/* * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers * Copyright (c) 1991-1995 by Xerox Corporation. All rights reserved. * Copyright 1996-1999 by Silicon Graphics. All rights reserved. * Copyright 1999 by Hewlett-Packard Company. All rights reserved. * Copyright (C) 2007 Free Software Foundation, Inc * Copyright (c) 2000-2011 by Hewlett-Packard Development Company. * Copyright (c) 2009-2018 Ivan Maidanski * * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. * * Permission is hereby granted to use or copy this program * for any purpose, provided the above notices are retained on all copies. * Permission to modify the code and to distribute modified code is granted, * provided the above notices are retained, and a notice that the code was * modified is included with the above copyright notice. */ /* * Note that this defines a large number of tuning hooks, which can * safely be ignored in nearly all cases. For normal use it suffices * to call only GC_MALLOC and perhaps GC_REALLOC. * For better performance, also look at GC_MALLOC_ATOMIC, and * GC_enable_incremental. If you need an action to be performed * immediately before an object is collected, look at GC_register_finalizer. * Everything else is best ignored unless you encounter performance * problems. */ #ifndef GC_H #define GC_H /* Help debug mixed up preprocessor symbols. */ #if (defined(WIN64) && !defined(_WIN64)) && defined(_MSC_VER) #pragma message("Warning: Expecting _WIN64 for x64 targets! Notice the leading underscore!") #endif #include "gc_version.h" /* Define version numbers here to allow test on build machine */ /* for cross-builds. Note that this defines the header */ /* version number, which may or may not match that of the */ /* dynamic library. GC_get_version() can be used to obtain */ /* the latter. */ #include "gc_config_macros.h" #ifdef __cplusplus extern "C" { #endif typedef void * GC_PTR; /* preserved only for backward compatibility */ /* Define word and signed_word to be unsigned and signed types of the */ /* size as char * or void *. There seems to be no way to do this */ /* even semi-portably. The following is probably no better/worse */ /* than almost anything else. */ /* The ANSI standard suggests that size_t and ptrdiff_t might be */ /* better choices. But those had incorrect definitions on some older */ /* systems. Notably "typedef int size_t" is WRONG. */ #ifdef _WIN64 # if defined(__int64) && !defined(CPPCHECK) typedef unsigned __int64 GC_word; typedef __int64 GC_signed_word; # else typedef unsigned long long GC_word; typedef long long GC_signed_word; # endif #else typedef unsigned long GC_word; typedef long GC_signed_word; #endif /* Get the GC library version. The returned value is a constant in the */ /* form: ((version_major<<16) | (version_minor<<8) | version_micro). */ GC_API unsigned GC_CALL GC_get_version(void); /* Public read-only variables */ /* The supplied getter functions are preferred for new code. */ GC_API GC_ATTR_DEPRECATED GC_word GC_gc_no; /* Counter incremented per collection. */ /* Includes empty GCs at startup. */ GC_API GC_word GC_CALL GC_get_gc_no(void); /* GC_get_gc_no() is unsynchronized, so */ /* it requires GC_call_with_alloc_lock() to */ /* avoid data races on multiprocessors. */ #ifdef GC_THREADS /* GC is parallelized for performance on multiprocessors. Set to */ /* a non-zero value when client calls GC_start_mark_threads() */ /* directly or starts the first non-main thread, provided the */ /* collector is built with PARALLEL_MARK defined, and either */ /* GC_MARKERS (or GC_NPROCS) environment variable is set to a value */ /* bigger than 1, or multiple cores (processors) are available. */ /* If GC_parallel is on (non-zero), incremental collection is only */ /* partially functional, and may not be desirable. Starting from */ /* GC v7.3, after setting, GC_parallel value is equal to the number */ /* of marker threads minus one (i.e. the number of existing parallel */ /* marker threads excluding the initiating one). */ GC_API GC_ATTR_DEPRECATED int GC_parallel; /* Return value of GC_parallel. Does not acquire the GC lock. */ GC_API int GC_CALL GC_get_parallel(void); #endif /* Public R/W variables */ /* The supplied setter and getter functions are preferred for new code. */ typedef void * (GC_CALLBACK * GC_oom_func)(size_t /* bytes_requested */); GC_API GC_ATTR_DEPRECATED GC_oom_func GC_oom_fn; /* When there is insufficient memory to satisfy */ /* an allocation request, we return */ /* (*GC_oom_fn)(size). By default this just */ /* returns NULL. */ /* If it returns, it must return 0 or a valid */ /* pointer to a previously allocated heap */ /* object. GC_oom_fn must not be 0. */ /* Both the supplied setter and the getter */ /* acquire the GC lock (to avoid data races). */ GC_API void GC_CALL GC_set_oom_fn(GC_oom_func) GC_ATTR_NONNULL(1); GC_API GC_oom_func GC_CALL GC_get_oom_fn(void); typedef void (GC_CALLBACK * GC_on_heap_resize_proc)(GC_word /* new_size */); GC_API GC_ATTR_DEPRECATED GC_on_heap_resize_proc GC_on_heap_resize; /* Invoked when the heap grows or shrinks. */ /* Called with the world stopped (and the */ /* allocation lock held). May be 0. */ GC_API void GC_CALL GC_set_on_heap_resize(GC_on_heap_resize_proc); GC_API GC_on_heap_resize_proc GC_CALL GC_get_on_heap_resize(void); /* Both the supplied setter and the getter */ /* acquire the GC lock (to avoid data races). */ typedef enum { GC_EVENT_START /* COLLECTION */, GC_EVENT_MARK_START, GC_EVENT_MARK_END, GC_EVENT_RECLAIM_START, GC_EVENT_RECLAIM_END, GC_EVENT_END /* COLLECTION */, GC_EVENT_PRE_STOP_WORLD /* STOPWORLD_BEGIN */, GC_EVENT_POST_STOP_WORLD /* STOPWORLD_END */, GC_EVENT_PRE_START_WORLD /* STARTWORLD_BEGIN */, GC_EVENT_POST_START_WORLD /* STARTWORLD_END */, GC_EVENT_THREAD_SUSPENDED, GC_EVENT_THREAD_UNSUSPENDED } GC_EventType; typedef void (GC_CALLBACK * GC_on_collection_event_proc)(GC_EventType); /* Invoked to indicate progress through the */ /* collection process. Not used for thread */ /* suspend/resume notifications. Called with */ /* the GC lock held (or, even, the world */ /* stopped). May be 0 (means no notifier). */ GC_API void GC_CALL GC_set_on_collection_event(GC_on_collection_event_proc); GC_API GC_on_collection_event_proc GC_CALL GC_get_on_collection_event(void); /* Both the supplied setter and the getter */ /* acquire the GC lock (to avoid data races). */ #if defined(GC_THREADS) || (defined(GC_BUILD) && defined(NN_PLATFORM_CTR)) typedef void (GC_CALLBACK * GC_on_thread_event_proc)(GC_EventType, void * /* thread_id */); /* Invoked when a thread is suspended or */ /* resumed during collection. Called with the */ /* GC lock held (and the world stopped */ /* partially). May be 0 (means no notifier). */ GC_API void GC_CALL GC_set_on_thread_event(GC_on_thread_event_proc); GC_API GC_on_thread_event_proc GC_CALL GC_get_on_thread_event(void); /* Both the supplied setter and the getter */ /* acquire the GC lock (to avoid data races). */ #endif GC_API GC_ATTR_DEPRECATED int GC_find_leak; /* Set to true to turn on the leak-finding mode */ /* (do not actually garbage collect, but simply */ /* report inaccessible memory that was not */ /* deallocated with GC_FREE). Initial value */ /* is determined by FIND_LEAK macro. */ /* The value should not typically be modified */ /* after GC initialization (and, thus, it does */ /* not use or need synchronization). */ GC_API void GC_CALL GC_set_find_leak(int); GC_API int GC_CALL GC_get_find_leak(void); GC_API GC_ATTR_DEPRECATED int GC_all_interior_pointers; /* Arrange for pointers to object interiors to */ /* be recognized as valid. Typically should */ /* not be changed after GC initialization (in */ /* case of calling it after the GC is */ /* initialized, the setter acquires the GC lock */ /* (to avoid data races). The initial value */ /* depends on whether the GC is built with */ /* ALL_INTERIOR_POINTERS macro defined or not. */ /* Unless DONT_ADD_BYTE_AT_END is defined, this */ /* also affects whether sizes are increased by */ /* at least a byte to allow "off the end" */ /* pointer recognition. Must be only 0 or 1. */ GC_API void GC_CALL GC_set_all_interior_pointers(int); GC_API int GC_CALL GC_get_all_interior_pointers(void); GC_API GC_ATTR_DEPRECATED int GC_finalize_on_demand; /* If nonzero, finalizers will only be run in */ /* response to an explicit GC_invoke_finalizers */ /* call. The default is determined by whether */ /* the FINALIZE_ON_DEMAND macro is defined */ /* when the collector is built. */ /* The setter and getter are unsynchronized. */ GC_API void GC_CALL GC_set_finalize_on_demand(int); GC_API int GC_CALL GC_get_finalize_on_demand(void); GC_API GC_ATTR_DEPRECATED int GC_java_finalization; /* Mark objects reachable from finalizable */ /* objects in a separate post-pass. This makes */ /* it a bit safer to use non-topologically- */ /* ordered finalization. Default value is */ /* determined by JAVA_FINALIZATION macro. */ /* Enables register_finalizer_unreachable to */ /* work correctly. */ /* The setter and getter are unsynchronized. */ GC_API void GC_CALL GC_set_java_finalization(int); GC_API int GC_CALL GC_get_java_finalization(void); typedef void (GC_CALLBACK * GC_finalizer_notifier_proc)(void); GC_API GC_ATTR_DEPRECATED GC_finalizer_notifier_proc GC_finalizer_notifier; /* Invoked by the collector when there are */ /* objects to be finalized. Invoked at most */ /* once per GC cycle. Never invoked unless */ /* GC_finalize_on_demand is set. */ /* Typically this will notify a finalization */ /* thread, which will call GC_invoke_finalizers */ /* in response. May be 0 (means no notifier). */ /* Both the supplied setter and the getter */ /* acquire the GC lock (to avoid data races). */ GC_API void GC_CALL GC_set_finalizer_notifier(GC_finalizer_notifier_proc); GC_API GC_finalizer_notifier_proc GC_CALL GC_get_finalizer_notifier(void); GC_API # ifndef GC_DONT_GC GC_ATTR_DEPRECATED # endif int GC_dont_gc; /* != 0 ==> Don't collect. In versions 6.2a1+, */ /* this overrides explicit GC_gcollect() calls. */ /* Used as a counter, so that nested enabling */ /* and disabling work correctly. Should */ /* normally be updated with GC_enable() and */ /* GC_disable() calls. Direct assignment to */ /* GC_dont_gc is deprecated. To check whether */ /* GC is disabled, GC_is_disabled() is */ /* preferred for new code. */ GC_API GC_ATTR_DEPRECATED int GC_dont_expand; /* Do not expand the heap unless explicitly */ /* requested or forced to. The setter and */ /* getter are unsynchronized. */ GC_API void GC_CALL GC_set_dont_expand(int); GC_API int GC_CALL GC_get_dont_expand(void); GC_API GC_ATTR_DEPRECATED int GC_use_entire_heap; /* Causes the non-incremental collector to use the */ /* entire heap before collecting. This was the only */ /* option for GC versions < 5.0. This sometimes */ /* results in more large block fragmentation, since */ /* very large blocks will tend to get broken up */ /* during each GC cycle. It is likely to result in a */ /* larger working set, but lower collection */ /* frequencies, and hence fewer instructions executed */ /* in the collector. */ GC_API GC_ATTR_DEPRECATED int GC_full_freq; /* Number of partial collections between */ /* full collections. Matters only if */ /* GC_is_incremental_mode(). */ /* Full collections are also triggered if */ /* the collector detects a substantial */ /* increase in the number of in-use heap */ /* blocks. Values in the tens are now */ /* perfectly reasonable, unlike for */ /* earlier GC versions. */ /* The setter and getter are unsynchronized, so */ /* GC_call_with_alloc_lock() is required to */ /* avoid data races (if the value is modified */ /* after the GC is put to multi-threaded mode). */ GC_API void GC_CALL GC_set_full_freq(int); GC_API int GC_CALL GC_get_full_freq(void); GC_API GC_ATTR_DEPRECATED GC_word GC_non_gc_bytes; /* Bytes not considered candidates for */ /* collection. Used only to control scheduling */ /* of collections. Updated by */ /* GC_malloc_uncollectable and GC_free. */ /* Wizards only. */ /* The setter and getter are unsynchronized, so */ /* GC_call_with_alloc_lock() is required to */ /* avoid data races (if the value is modified */ /* after the GC is put to multi-threaded mode). */ GC_API void GC_CALL GC_set_non_gc_bytes(GC_word); GC_API GC_word GC_CALL GC_get_non_gc_bytes(void); GC_API GC_ATTR_DEPRECATED int GC_no_dls; /* Don't register dynamic library data segments. */ /* Wizards only. Should be used only if the */ /* application explicitly registers all roots. */ /* (In some environments like Microsoft Windows */ /* and Apple's Darwin, this may also prevent */ /* registration of the main data segment as part */ /* of the root set.) */ /* The setter and getter are unsynchronized. */ GC_API void GC_CALL GC_set_no_dls(int); GC_API int GC_CALL GC_get_no_dls(void); GC_API GC_ATTR_DEPRECATED GC_word GC_free_space_divisor; /* We try to make sure that we allocate at */ /* least N/GC_free_space_divisor bytes between */ /* collections, where N is twice the number */ /* of traced bytes, plus the number of untraced */ /* bytes (bytes in "atomic" objects), plus */ /* a rough estimate of the root set size. */ /* N approximates GC tracing work per GC. */ /* The initial value is GC_FREE_SPACE_DIVISOR. */ /* Increasing its value will use less space */ /* but more collection time. Decreasing it */ /* will appreciably decrease collection time */ /* at the expense of space. */ /* The setter and getter are unsynchronized, so */ /* GC_call_with_alloc_lock() is required to */ /* avoid data races (if the value is modified */ /* after the GC is put to multi-threaded mode). */ /* In version 7.1 (and before), the setter */ /* returned the old value. */ GC_API void GC_CALL GC_set_free_space_divisor(GC_word); GC_API GC_word GC_CALL GC_get_free_space_divisor(void); GC_API GC_ATTR_DEPRECATED GC_word GC_max_retries; /* The maximum number of GCs attempted before */ /* reporting out of memory after heap */ /* expansion fails. Initially 0. */ /* The setter and getter are unsynchronized, so */ /* GC_call_with_alloc_lock() is required to */ /* avoid data races (if the value is modified */ /* after the GC is put to multi-threaded mode). */ GC_API void GC_CALL GC_set_max_retries(GC_word); GC_API GC_word GC_CALL GC_get_max_retries(void); GC_API GC_ATTR_DEPRECATED char *GC_stackbottom; /* Cool end of user stack. */ /* May be set in the client prior to */ /* calling any GC_ routines. This */ /* avoids some overhead, and */ /* potentially some signals that can */ /* confuse debuggers. Otherwise the */ /* collector attempts to set it */ /* automatically. */ /* For multi-threaded code, this is the */ /* cold end of the stack for the */ /* primordial thread. Portable clients */ /* should use GC_get_stack_base(), */ /* GC_call_with_gc_active() and */ /* GC_register_my_thread() instead. */ GC_API GC_ATTR_DEPRECATED int GC_dont_precollect; /* Do not collect as part of GC */ /* initialization. Should be set only */ /* if the client wants a chance to */ /* manually initialize the root set */ /* before the first collection. */ /* Interferes with blacklisting. */ /* Wizards only. The setter and getter */ /* are unsynchronized (and no external */ /* locking is needed since the value is */ /* accessed at GC initialization only). */ GC_API void GC_CALL GC_set_dont_precollect(int); GC_API int GC_CALL GC_get_dont_precollect(void); GC_API GC_ATTR_DEPRECATED unsigned long GC_time_limit; /* If incremental collection is enabled, */ /* We try to terminate collections */ /* after this many milliseconds. Not a */ /* hard time bound. Setting this to */ /* GC_TIME_UNLIMITED will essentially */ /* disable incremental collection while */ /* leaving generational collection */ /* enabled. */ #define GC_TIME_UNLIMITED 999999 /* Setting GC_time_limit to this value */ /* will disable the "pause time exceeded"*/ /* tests. */ /* The setter and getter are unsynchronized, so */ /* GC_call_with_alloc_lock() is required to */ /* avoid data races (if the value is modified */ /* after the GC is put to multi-threaded mode). */ GC_API void GC_CALL GC_set_time_limit(unsigned long); GC_API unsigned long GC_CALL GC_get_time_limit(void); /* Public procedures */ /* Tell the collector to start various performance measurements. */ /* Only the total time taken by full collections is calculated, as */ /* of now. And, currently, there is no way to stop the measurements. */ /* The function does not use any synchronization. Defined only if the */ /* library has been compiled without NO_CLOCK. */ GC_API void GC_CALL GC_start_performance_measurement(void); /* Get the total time of all full collections since the start of the */ /* performance measurements. The measurement unit is one millisecond. */ /* Note that the returned value wraps around on overflow. */ /* The function does not use any synchronization. Defined only if the */ /* library has been compiled without NO_CLOCK. */ GC_API unsigned long GC_CALL GC_get_full_gc_total_time(void); /* Set whether the GC will allocate executable memory pages or not. */ /* A non-zero argument instructs the collector to allocate memory with */ /* the executable flag on. Must be called before the collector is */ /* initialized. May have no effect on some platforms. The default */ /* value is controlled by NO_EXECUTE_PERMISSION macro (if present then */ /* the flag is off). Portable clients should have */ /* GC_set_pages_executable(1) call (before GC_INIT) provided they are */ /* going to execute code on any of the GC-allocated memory objects. */ GC_API void GC_CALL GC_set_pages_executable(int); /* Returns non-zero value if the GC is set to the allocate-executable */ /* mode. The mode could be changed by GC_set_pages_executable (before */ /* GC_INIT) unless the former has no effect on the platform. Does not */ /* use or need synchronization (i.e. acquiring the allocator lock). */ GC_API int GC_CALL GC_get_pages_executable(void); /* The setter and getter of the minimum value returned by the internal */ /* min_bytes_allocd(). The value should not be zero; the default value */ /* is one. Not synchronized. */ GC_API void GC_CALL GC_set_min_bytes_allocd(size_t); GC_API size_t GC_CALL GC_get_min_bytes_allocd(void); /* Set/get the size in pages of units operated by GC_collect_a_little. */ /* The value should not be zero. Not synchronized. */ GC_API void GC_CALL GC_set_rate(int); GC_API int GC_CALL GC_get_rate(void); /* Set/get the maximum number of prior attempts at the world-stop */ /* marking. Not synchronized. */ GC_API void GC_CALL GC_set_max_prior_attempts(int); GC_API int GC_CALL GC_get_max_prior_attempts(void); /* Overrides the default handle-fork mode. Non-zero value means GC */ /* should install proper pthread_atfork handlers. Has effect only if */ /* called before GC_INIT. Clients should invoke GC_set_handle_fork */ /* with non-zero argument if going to use fork with GC functions called */ /* in the forked child. (Note that such client and atfork handlers */ /* activities are not fully POSIX-compliant.) GC_set_handle_fork */ /* instructs GC_init to setup GC fork handlers using pthread_atfork, */ /* the latter might fail (or, even, absent on some targets) causing */ /* abort at GC initialization. Starting from 7.3alpha3, problems with */ /* missing (or failed) pthread_atfork() could be avoided by invocation */ /* of GC_set_handle_fork(-1) at application start-up and surrounding */ /* each fork() with the relevant GC_atfork_prepare/parent/child calls. */ GC_API void GC_CALL GC_set_handle_fork(int); /* Routines to handle POSIX fork() manually (no-op if handled */ /* automatically). GC_atfork_prepare should be called immediately */ /* before fork(); GC_atfork_parent should be invoked just after fork in */ /* the branch that corresponds to parent process (i.e., fork result is */ /* non-zero); GC_atfork_child is to be called immediately in the child */ /* branch (i.e., fork result is 0). Note that GC_atfork_child() call */ /* should, of course, precede GC_start_mark_threads call (if any). */ GC_API void GC_CALL GC_atfork_prepare(void); GC_API void GC_CALL GC_atfork_parent(void); GC_API void GC_CALL GC_atfork_child(void); /* Initialize the collector. Portable clients should call GC_INIT() */ /* from the main program instead. */ GC_API void GC_CALL GC_init(void); /* Returns non-zero (TRUE) if and only if the collector is initialized */ /* (or, at least, the initialization is in progress). */ GC_API int GC_CALL GC_is_init_called(void); /* Perform the collector shutdown. (E.g. dispose critical sections on */ /* Win32 target.) A duplicate invocation is a no-op. GC_INIT should */ /* not be called after the shutdown. See also GC_win32_free_heap(). */ GC_API void GC_CALL GC_deinit(void); /* General purpose allocation routines, with roughly malloc calling */ /* conv. The atomic versions promise that no relevant pointers are */ /* contained in the object. The non-atomic versions guarantee that the */ /* new object is cleared. GC_malloc_uncollectable allocates */ /* an object that is scanned for pointers to collectible */ /* objects, but is not itself collectible. The object is scanned even */ /* if it does not appear to be reachable. GC_malloc_uncollectable and */ /* GC_free called on the resulting object implicitly update */ /* GC_non_gc_bytes appropriately. */ GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_malloc(size_t /* size_in_bytes */); GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_malloc_atomic(size_t /* size_in_bytes */); GC_API GC_ATTR_MALLOC char * GC_CALL GC_strdup(const char *); GC_API GC_ATTR_MALLOC char * GC_CALL GC_strndup(const char *, size_t) GC_ATTR_NONNULL(1); GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_malloc_uncollectable(size_t /* size_in_bytes */); GC_API GC_ATTR_DEPRECATED void * GC_CALL GC_malloc_stubborn(size_t); /* GC_memalign() is not well tested. */ GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(2) void * GC_CALL GC_memalign(size_t /* align */, size_t /* lb */); GC_API int GC_CALL GC_posix_memalign(void ** /* memptr */, size_t /* align */, size_t /* lb */) GC_ATTR_NONNULL(1); /* Explicitly deallocate an object. Dangerous if used incorrectly. */ /* Requires a pointer to the base of an object. */ /* An object should not be enabled for finalization (and it should not */ /* contain registered disappearing links of any kind) when it is */ /* explicitly deallocated. */ /* GC_free(0) is a no-op, as required by ANSI C for free. */ GC_API void GC_CALL GC_free(void *); /* The "stubborn" objects allocation is not supported anymore. Exists */ /* only for the backward compatibility. */ #define GC_MALLOC_STUBBORN(sz) GC_MALLOC(sz) #define GC_NEW_STUBBORN(t) GC_NEW(t) #define GC_CHANGE_STUBBORN(p) GC_change_stubborn(p) GC_API GC_ATTR_DEPRECATED void GC_CALL GC_change_stubborn(const void *); /* Inform the collector that the object has been changed. */ /* Only non-NULL pointer stores into the object are considered to be */ /* changes. Matters only if the incremental collection is enabled in */ /* the manual VDB mode (otherwise the function does nothing). */ /* Should be followed typically by GC_reachable_here called for each */ /* of the stored pointers. */ GC_API void GC_CALL GC_end_stubborn_change(const void *) GC_ATTR_NONNULL(1); /* Return a pointer to the base (lowest address) of an object given */ /* a pointer to a location within the object. */ /* I.e., map an interior pointer to the corresponding base pointer. */ /* Note that with debugging allocation, this returns a pointer to the */ /* actual base of the object, i.e. the debug information, not to */ /* the base of the user object. */ /* Return 0 if displaced_pointer doesn't point to within a valid */ /* object. */ /* Note that a deallocated object in the garbage collected heap */ /* may be considered valid, even if it has been deallocated with */ /* GC_free. */ GC_API void * GC_CALL GC_base(void * /* displaced_pointer */); /* Return non-zero (TRUE) if and only if the argument points to */ /* somewhere in GC heap. Primary use is as a fast alternative to */ /* GC_base to check whether the pointed object is allocated by GC */ /* or not. It is assumed that the collector is already initialized. */ GC_API int GC_CALL GC_is_heap_ptr(const void *); /* Given a pointer to the base of an object, return its size in bytes. */ /* The returned size may be slightly larger than what was originally */ /* requested. */ GC_API size_t GC_CALL GC_size(const void * /* obj_addr */) GC_ATTR_NONNULL(1); /* For compatibility with C library. This is occasionally faster than */ /* a malloc followed by a bcopy. But if you rely on that, either here */ /* or with the standard C library, your code is broken. In my */ /* opinion, it shouldn't have been invented, but now we're stuck. -HB */ /* The resulting object has the same kind as the original. */ /* It is an error to have changes enabled for the original object. */ /* It does not change the content of the object from its beginning to */ /* the minimum of old size and new_size_in_bytes; the content above in */ /* case of object size growth is initialized to zero (not guaranteed */ /* for atomic object type). The function follows ANSI conventions for */ /* NULL old_object (i.e., equivalent to GC_malloc regardless of new */ /* size). If new size is zero (and old_object is non-NULL) then the */ /* call is equivalent to GC_free (and NULL is returned). If old_object */ /* is non-NULL, it must have been returned by an earlier call to */ /* GC_malloc* or GC_realloc. In case of the allocation failure, the */ /* memory pointed by old_object is untouched (and not freed). */ /* If the returned pointer is not the same as old_object and both of */ /* them are non-NULL then old_object is freed. Returns either NULL (in */ /* case of the allocation failure or zero new size) or pointer to the */ /* allocated memory. */ GC_API void * GC_CALL GC_realloc(void * /* old_object */, size_t /* new_size_in_bytes */) /* 'realloc' attr */ GC_ATTR_ALLOC_SIZE(2); /* Explicitly increase the heap size. */ /* Returns 0 on failure, 1 on success. */ GC_API int GC_CALL GC_expand_hp(size_t /* number_of_bytes */); /* Limit the heap size to n bytes. Useful when you're debugging, */ /* especially on systems that don't handle running out of memory well. */ /* n == 0 ==> unbounded. This is the default. This setter function is */ /* unsynchronized (so it might require GC_call_with_alloc_lock to avoid */ /* data races). */ GC_API void GC_CALL GC_set_max_heap_size(GC_word /* n */); /* Inform the collector that a certain section of statically allocated */ /* memory contains no pointers to garbage collected memory. Thus it */ /* need not be scanned. This is sometimes important if the application */ /* maps large read/write files into the address space, which could be */ /* mistaken for dynamic library data segments on some systems. */ /* Both section start and end are not needed to be pointer-aligned. */ GC_API void GC_CALL GC_exclude_static_roots(void * /* low_address */, void * /* high_address_plus_1 */); /* Clear the set of root segments. Wizards only. */ GC_API void GC_CALL GC_clear_roots(void); /* Add a root segment. Wizards only. */ /* Both segment start and end are not needed to be pointer-aligned. */ /* low_address must not be greater than high_address_plus_1. */ GC_API void GC_CALL GC_add_roots(void * /* low_address */, void * /* high_address_plus_1 */); /* Remove a root segment. Wizards only. */ /* May be unimplemented on some platforms. */ GC_API void GC_CALL GC_remove_roots(void * /* low_address */, void * /* high_address_plus_1 */); /* Add a displacement to the set of those considered valid by the */ /* collector. GC_register_displacement(n) means that if p was returned */ /* by GC_malloc, then (char *)p + n will be considered to be a valid */ /* pointer to p. N must be small and less than the size of p. */ /* (All pointers to the interior of objects from the stack are */ /* considered valid in any case. This applies to heap objects and */ /* static data.) */ /* Preferably, this should be called before any other GC procedures. */ /* Calling it later adds to the probability of excess memory */ /* retention. */ /* This is a no-op if the collector has recognition of */ /* arbitrary interior pointers enabled, which is now the default. */ GC_API void GC_CALL GC_register_displacement(size_t /* n */); /* The following version should be used if any debugging allocation is */ /* being done. */ GC_API void GC_CALL GC_debug_register_displacement(size_t /* n */); /* Explicitly trigger a full, world-stop collection. */ GC_API void GC_CALL GC_gcollect(void); /* Same as above but ignores the default stop_func setting and tries to */ /* unmap as much memory as possible (regardless of the corresponding */ /* switch setting). The recommended usage: on receiving a system */ /* low-memory event; before retrying a system call failed because of */ /* the system is running out of resources. */ GC_API void GC_CALL GC_gcollect_and_unmap(void); /* Trigger a full world-stopped collection. Abort the collection if */ /* and when stop_func returns a nonzero value. Stop_func will be */ /* called frequently, and should be reasonably fast. (stop_func is */ /* called with the allocation lock held and the world might be stopped; */ /* it's not allowed for stop_func to manipulate pointers to the garbage */ /* collected heap or call most of GC functions.) This works even */ /* if virtual dirty bits, and hence incremental collection is not */ /* available for this architecture. Collections can be aborted faster */ /* than normal pause times for incremental collection. However, */ /* aborted collections do no useful work; the next collection needs */ /* to start from the beginning. stop_func must not be 0. */ /* GC_try_to_collect() returns 0 if the collection was aborted (or the */ /* collections are disabled), 1 if it succeeded. */ typedef int (GC_CALLBACK * GC_stop_func)(void); GC_API int GC_CALL GC_try_to_collect(GC_stop_func /* stop_func */) GC_ATTR_NONNULL(1); /* Set and get the default stop_func. The default stop_func is used by */ /* GC_gcollect() and by implicitly triggered collections (except for */ /* the case when handling out of memory). Must not be 0. */ /* Both the setter and getter acquire the GC lock to avoid data races. */ GC_API void GC_CALL GC_set_stop_func(GC_stop_func /* stop_func */) GC_ATTR_NONNULL(1); GC_API GC_stop_func GC_CALL GC_get_stop_func(void); /* Return the number of bytes in the heap. Excludes collector private */ /* data structures. Excludes the unmapped memory (returned to the OS). */ /* Includes empty blocks and fragmentation loss. Includes some pages */ /* that were allocated but never written. */ /* This is an unsynchronized getter, so it should be called typically */ /* with the GC lock held to avoid data races on multiprocessors (the */ /* alternative is to use GC_get_heap_usage_safe or GC_get_prof_stats */ /* API calls instead). */ /* This getter remains lock-free (unsynchronized) for compatibility */ /* reason since some existing clients call it from a GC callback */ /* holding the allocator lock. (This API function and the following */ /* four ones below were made thread-safe in GC v7.2alpha1 and */ /* reverted back in v7.2alpha7 for the reason described.) */ GC_API size_t GC_CALL GC_get_heap_size(void); /* Return a lower bound on the number of free bytes in the heap */ /* (excluding the unmapped memory space). This is an unsynchronized */ /* getter (see GC_get_heap_size comment regarding thread-safety). */ GC_API size_t GC_CALL GC_get_free_bytes(void); /* Return the size (in bytes) of the unmapped memory (which is returned */ /* to the OS but could be remapped back by the collector later unless */ /* the OS runs out of system/virtual memory). This is an unsynchronized */ /* getter (see GC_get_heap_size comment regarding thread-safety). */ GC_API size_t GC_CALL GC_get_unmapped_bytes(void); /* Return the number of bytes allocated since the last collection. */ /* This is an unsynchronized getter (see GC_get_heap_size comment */ /* regarding thread-safety). */ GC_API size_t GC_CALL GC_get_bytes_since_gc(void); /* Return the number of explicitly deallocated bytes of memory since */ /* the recent collection. This is an unsynchronized getter. */ GC_API size_t GC_CALL GC_get_expl_freed_bytes_since_gc(void); /* Return the total number of bytes allocated in this process. */ /* Never decreases, except due to wrapping. This is an unsynchronized */ /* getter (see GC_get_heap_size comment regarding thread-safety). */ GC_API size_t GC_CALL GC_get_total_bytes(void); /* Return the heap usage information. This is a thread-safe (atomic) */ /* alternative for the five above getters. (This function acquires */ /* the allocator lock thus preventing data racing and returning the */ /* consistent result.) Passing NULL pointer is allowed for any */ /* argument. Returned (filled in) values are of word type. */ /* (This API function was introduced in GC v7.2alpha7 at the same time */ /* when GC_get_heap_size and the friends were made lock-free again.) */ GC_API void GC_CALL GC_get_heap_usage_safe(GC_word * /* pheap_size */, GC_word * /* pfree_bytes */, GC_word * /* punmapped_bytes */, GC_word * /* pbytes_since_gc */, GC_word * /* ptotal_bytes */); /* Structure used to query GC statistics (profiling information). */ /* More fields could be added in the future. To preserve compatibility */ /* new fields should be added only to the end, and no deprecated fields */ /* should be removed from. */ struct GC_prof_stats_s { GC_word heapsize_full; /* Heap size in bytes (including the area unmapped to OS). */ /* Same as GC_get_heap_size() + GC_get_unmapped_bytes(). */ GC_word free_bytes_full; /* Total bytes contained in free and unmapped blocks. */ /* Same as GC_get_free_bytes() + GC_get_unmapped_bytes(). */ GC_word unmapped_bytes; /* Amount of memory unmapped to OS. Same as the value */ /* returned by GC_get_unmapped_bytes(). */ GC_word bytes_allocd_since_gc; /* Number of bytes allocated since the recent collection. */ /* Same as returned by GC_get_bytes_since_gc(). */ GC_word allocd_bytes_before_gc; /* Number of bytes allocated before the recent garbage */ /* collection. The value may wrap. Same as the result of */ /* GC_get_total_bytes() - GC_get_bytes_since_gc(). */ GC_word non_gc_bytes; /* Number of bytes not considered candidates for garbage */ /* collection. Same as returned by GC_get_non_gc_bytes(). */ GC_word gc_no; /* Garbage collection cycle number. The value may wrap */ /* (and could be -1). Same as returned by GC_get_gc_no(). */ GC_word markers_m1; /* Number of marker threads (excluding the initiating one). */ /* Same as returned by GC_get_parallel (or 0 if the */ /* collector is single-threaded). */ GC_word bytes_reclaimed_since_gc; /* Approximate number of reclaimed bytes after recent GC. */ GC_word reclaimed_bytes_before_gc; /* Approximate number of bytes reclaimed before the recent */ /* garbage collection. The value may wrap. */ GC_word expl_freed_bytes_since_gc; /* Number of bytes freed explicitly since the recent GC. */ /* Same as returned by GC_get_expl_freed_bytes_since_gc(). */ }; /* Atomically get GC statistics (various global counters). Clients */ /* should pass the size of the buffer (of GC_prof_stats_s type) to fill */ /* in the values - this is for interoperability between different GC */ /* versions, an old client could have fewer fields, and vice versa, */ /* client could use newer gc.h (with more entries declared in the */ /* structure) than that of the linked libgc binary; in the latter case, */ /* unsupported (unknown) fields are filled in with -1. Return the size */ /* (in bytes) of the filled in part of the structure (excluding all */ /* unknown fields, if any). */ GC_API size_t GC_CALL GC_get_prof_stats(struct GC_prof_stats_s *, size_t /* stats_sz */); #ifdef GC_THREADS /* Same as above but unsynchronized (i.e., not holding the allocation */ /* lock). Clients should call it using GC_call_with_alloc_lock to */ /* avoid data races on multiprocessors. */ GC_API size_t GC_CALL GC_get_prof_stats_unsafe(struct GC_prof_stats_s *, size_t /* stats_sz */); #endif /* Get the element value (converted to bytes) at a given index of */ /* size_map table which provides requested-to-actual allocation size */ /* mapping. Assumes the collector is initialized. Returns -1 if the */ /* index is out of size_map table bounds. Does not use synchronization, */ /* thus clients should call it using GC_call_with_alloc_lock typically */ /* to avoid data races on multiprocessors. */ GC_API size_t GC_CALL GC_get_size_map_at(int i); /* Count total memory use in bytes by all allocated blocks. Acquires */ /* the lock. */ GC_API size_t GC_CALL GC_get_memory_use(void); /* Disable garbage collection. Even GC_gcollect calls will be */ /* ineffective. */ GC_API void GC_CALL GC_disable(void); /* Return non-zero (TRUE) if and only if garbage collection is disabled */ /* (i.e., GC_dont_gc value is non-zero). Does not acquire the lock. */ GC_API int GC_CALL GC_is_disabled(void); /* Try to re-enable garbage collection. GC_disable() and GC_enable() */ /* calls nest. Garbage collection is enabled if the number of calls to */ /* both functions is equal. */ GC_API void GC_CALL GC_enable(void); /* Select whether to use the manual VDB mode for the incremental */ /* collection. Has no effect if called after enabling the incremental */ /* collection. The default value is off unless the collector is */ /* compiled with MANUAL_VDB defined. The manual VDB mode should be */ /* used only if the client has the appropriate GC_END_STUBBORN_CHANGE */ /* and GC_reachable_here (or, alternatively, GC_PTR_STORE_AND_DIRTY) */ /* calls (to ensure proper write barriers). Both the setter and getter */ /* are not synchronized, and are defined only if the library has been */ /* compiled without SMALL_CONFIG. */ GC_API void GC_CALL GC_set_manual_vdb_allowed(int); GC_API int GC_CALL GC_get_manual_vdb_allowed(void); /* Enable incremental/generational collection. Not advisable unless */ /* dirty bits are available or most heap objects are pointer-free */ /* (atomic) or immutable. Don't use in leak finding mode. Ignored if */ /* GC_dont_gc is non-zero. Only the generational piece of this is */ /* functional if GC_parallel is non-zero or if GC_time_limit is */ /* GC_TIME_UNLIMITED. Causes thread-local variant of GC_gcj_malloc() */ /* to revert to locked allocation. Must be called before any such */ /* GC_gcj_malloc() calls. For best performance, should be called as */ /* early as possible. On some platforms, calling it later may have */ /* adverse effects. */ /* Safe to call before GC_INIT(). Includes a GC_init() call. */ GC_API void GC_CALL GC_enable_incremental(void); /* Return non-zero (TRUE) if and only if the incremental mode is on. */ /* Does not acquire the lock. */ GC_API int GC_CALL GC_is_incremental_mode(void); /* Does incremental mode write-protect pages? Returns zero or */ /* more of the following, or'ed together: */ #define GC_PROTECTS_POINTER_HEAP 1 /* May protect non-atomic objects. */ #define GC_PROTECTS_PTRFREE_HEAP 2 #define GC_PROTECTS_STATIC_DATA 4 /* Currently never. */ #define GC_PROTECTS_STACK 8 /* Probably impractical. */ #define GC_PROTECTS_NONE 0 /* The collector is assumed to be initialized before this call. */ GC_API int GC_CALL GC_incremental_protection_needs(void); /* Perform some garbage collection work, if appropriate. */ /* Return 0 if there is no more work to be done (including the */ /* case when garbage collection is not appropriate). */ /* Typically performs an amount of work corresponding roughly */ /* to marking from one page. May do more work if further */ /* progress requires it, e.g. if incremental collection is */ /* disabled. It is reasonable to call this in a wait loop */ /* until it returns 0. */ GC_API int GC_CALL GC_collect_a_little(void); /* Allocate an object of size lb bytes. The client guarantees that */ /* as long as the object is live, it will be referenced by a pointer */ /* that points to somewhere within the first 256 bytes of the object. */ /* (This should normally be declared volatile to prevent the compiler */ /* from invalidating this assertion.) This routine is only useful */ /* if a large array is being allocated. It reduces the chance of */ /* accidentally retaining such an array as a result of scanning an */ /* integer that happens to be an address inside the array. (Actually, */ /* it reduces the chance of the allocator not finding space for such */ /* an array, since it will try hard to avoid introducing such a false */ /* reference.) On a SunOS 4.X or MS Windows system this is recommended */ /* for arrays likely to be larger than 100K or so. For other systems, */ /* or if the collector is not configured to recognize all interior */ /* pointers, the threshold is normally much higher. */ GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_malloc_ignore_off_page(size_t /* lb */); GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_malloc_atomic_ignore_off_page(size_t /* lb */); #ifdef GC_ADD_CALLER # define GC_EXTRAS GC_RETURN_ADDR, __FILE__, __LINE__ # define GC_EXTRA_PARAMS GC_word ra, const char * s, int i #else # define GC_EXTRAS __FILE__, __LINE__ # define GC_EXTRA_PARAMS const char * s, int i #endif /* The following is only defined if the library has been suitably */ /* compiled: */ GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_malloc_atomic_uncollectable(size_t /* size_in_bytes */); GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_debug_malloc_atomic_uncollectable(size_t, GC_EXTRA_PARAMS); /* Debugging (annotated) allocation. GC_gcollect will check */ /* objects allocated in this way for overwrites, etc. */ GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_debug_malloc(size_t /* size_in_bytes */, GC_EXTRA_PARAMS); GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_debug_malloc_atomic(size_t /* size_in_bytes */, GC_EXTRA_PARAMS); GC_API GC_ATTR_MALLOC char * GC_CALL GC_debug_strdup(const char *, GC_EXTRA_PARAMS); GC_API GC_ATTR_MALLOC char * GC_CALL GC_debug_strndup(const char *, size_t, GC_EXTRA_PARAMS) GC_ATTR_NONNULL(1); GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_debug_malloc_uncollectable(size_t /* size_in_bytes */, GC_EXTRA_PARAMS); GC_API GC_ATTR_DEPRECATED void * GC_CALL GC_debug_malloc_stubborn(size_t /* size_in_bytes */, GC_EXTRA_PARAMS); GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_debug_malloc_ignore_off_page(size_t /* size_in_bytes */, GC_EXTRA_PARAMS); GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_debug_malloc_atomic_ignore_off_page(size_t /* size_in_bytes */, GC_EXTRA_PARAMS); GC_API void GC_CALL GC_debug_free(void *); GC_API void * GC_CALL GC_debug_realloc(void * /* old_object */, size_t /* new_size_in_bytes */, GC_EXTRA_PARAMS) /* 'realloc' attr */ GC_ATTR_ALLOC_SIZE(2); GC_API #if !defined(CPPCHECK) GC_ATTR_DEPRECATED #endif void GC_CALL GC_debug_change_stubborn(const void *); GC_API void GC_CALL GC_debug_end_stubborn_change(const void *) GC_ATTR_NONNULL(1); /* Routines that allocate objects with debug information (like the */ /* above), but just fill in dummy file and line number information. */ /* Thus they can serve as drop-in malloc/realloc replacements. This */ /* can be useful for two reasons: */ /* 1) It allows the collector to be built with DBG_HDRS_ALL defined */ /* even if some allocation calls come from 3rd party libraries */ /* that can't be recompiled. */ /* 2) On some platforms, the file and line information is redundant, */ /* since it can be reconstructed from a stack trace. On such */ /* platforms it may be more convenient not to recompile, e.g. for */ /* leak detection. This can be accomplished by instructing the */ /* linker to replace malloc/realloc with these. */ GC_API GC_ATTR_MALLOC GC_ATTR_ALLOC_SIZE(1) void * GC_CALL GC_debug_malloc_replacement(size_t /* size_in_bytes */); GC_API /* 'realloc' attr */ GC_ATTR_ALLOC_SIZE(2) void * GC_CALL GC_debug_realloc_replacement(void * /* object_addr */, size_t /* size_in_bytes */); #ifdef GC_DEBUG_REPLACEMENT # define GC_MALLOC(sz) GC_debug_malloc_replacement(sz) # define GC_REALLOC(old, sz) GC_debug_realloc_replacement(old, sz) #elif defined(GC_DEBUG) # define GC_MALLOC(sz) GC_debug_malloc(sz, GC_EXTRAS) # define GC_REALLOC(old, sz) GC_debug_realloc(old, sz, GC_EXTRAS) #else # define GC_MALLOC(sz) GC_malloc(sz) # define GC_REALLOC(old, sz) GC_realloc(old, sz) #endif /* !GC_DEBUG_REPLACEMENT && !GC_DEBUG */ #ifdef GC_DEBUG # define GC_MALLOC_ATOMIC(sz) GC_debug_malloc_atomic(sz, GC_EXTRAS) # define GC_STRDUP(s) GC_debug_strdup(s, GC_EXTRAS) # define GC_STRNDUP(s, sz) GC_debug_strndup(s, sz, GC_EXTRAS) # define GC_MALLOC_ATOMIC_UNCOLLECTABLE(sz) \ GC_debug_malloc_atomic_uncollectable(sz, GC_EXTRAS) # define GC_MALLOC_UNCOLLECTABLE(sz) \ GC_debug_malloc_uncollectable(sz, GC_EXTRAS) # define GC_MALLOC_IGNORE_OFF_PAGE(sz) \ GC_debug_malloc_ignore_off_page(sz, GC_EXTRAS) # define GC_MALLOC_ATOMIC_IGNORE_OFF_PAGE(sz) \ GC_debug_malloc_atomic_ignore_off_page(sz, GC_EXTRAS) # define GC_FREE(p) GC_debug_free(p) # define GC_REGISTER_FINALIZER(p, f, d, of, od) \ GC_debug_register_finalizer(p, f, d, of, od) # define GC_REGISTER_FINALIZER_IGNORE_SELF(p, f, d, of, od) \ GC_debug_register_finalizer_ignore_self(p, f, d, of, od) # define GC_REGISTER_FINALIZER_NO_ORDER(p, f, d, of, od) \ GC_debug_register_finalizer_no_order(p, f, d, of, od) # define GC_REGISTER_FINALIZER_UNREACHABLE(p, f, d, of, od) \ GC_debug_register_finalizer_unreachable(p, f, d, of, od) # define GC_END_STUBBORN_CHANGE(p) GC_debug_end_stubborn_change(p) # define GC_PTR_STORE_AND_DIRTY(p, q) GC_debug_ptr_store_and_dirty(p, q) # define GC_GENERAL_REGISTER_DISAPPEARING_LINK(link, obj) \ GC_general_register_disappearing_link(link, \ GC_base((/* no const */ void *)(obj))) # define GC_REGISTER_LONG_LINK(link, obj) \ GC_register_long_link(link, GC_base((/* no const */ void *)(obj))) # define GC_REGISTER_DISPLACEMENT(n) GC_debug_register_displacement(n) #else # define GC_MALLOC_ATOMIC(sz) GC_malloc_atomic(sz) # define GC_STRDUP(s) GC_strdup(s) # define GC_STRNDUP(s, sz) GC_strndup(s, sz) # define GC_MALLOC_ATOMIC_UNCOLLECTABLE(sz) GC_malloc_atomic_uncollectable(sz) # define GC_MALLOC_UNCOLLECTABLE(sz) GC_malloc_uncollectable(sz) # define GC_MALLOC_IGNORE_OFF_PAGE(sz) \ GC_malloc_ignore_off_page(sz) # define GC_MALLOC_ATOMIC_IGNORE_OFF_PAGE(sz) \ GC_malloc_atomic_ignore_off_page(sz) # define GC_FREE(p) GC_free(p) # define GC_REGISTER_FINALIZER(p, f, d, of, od) \ GC_register_finalizer(p, f, d, of, od) # define GC_REGISTER_FINALIZER_IGNORE_SELF(p, f, d, of, od) \ GC_register_finalizer_ignore_self(p, f, d, of, od) # define GC_REGISTER_FINALIZER_NO_ORDER(p, f, d, of, od) \ GC_register_finalizer_no_order(p, f, d, of, od) # define GC_REGISTER_FINALIZER_UNREACHABLE(p, f, d, of, od) \ GC_register_finalizer_unreachable(p, f, d, of, od) # define GC_END_STUBBORN_CHANGE(p) GC_end_stubborn_change(p) # define GC_PTR_STORE_AND_DIRTY(p, q) GC_ptr_store_and_dirty(p, q) # define GC_GENERAL_REGISTER_DISAPPEARING_LINK(link, obj) \ GC_general_register_disappearing_link(link, obj) # define GC_REGISTER_LONG_LINK(link, obj) \ GC_register_long_link(link, obj) # define GC_REGISTER_DISPLACEMENT(n) GC_register_displacement(n) #endif /* !GC_DEBUG */ /* The following are included because they are often convenient, and */ /* reduce the chance for a misspecified size argument. But calls may */ /* expand to something syntactically incorrect if t is a complicated */ /* type expression. Note that, unlike C++ new operator, these ones */ /* may return NULL (if out of memory). */ #define GC_NEW(t) ((t*)GC_MALLOC(sizeof(t))) #define GC_NEW_ATOMIC(t) ((t*)GC_MALLOC_ATOMIC(sizeof(t))) #define GC_NEW_UNCOLLECTABLE(t) ((t*)GC_MALLOC_UNCOLLECTABLE(sizeof(t))) #ifdef GC_REQUIRE_WCSDUP /* This might be unavailable on some targets (or not needed). */ /* wchar_t should be defined in stddef.h */ GC_API GC_ATTR_MALLOC wchar_t * GC_CALL GC_wcsdup(const wchar_t *) GC_ATTR_NONNULL(1); GC_API GC_ATTR_MALLOC wchar_t * GC_CALL GC_debug_wcsdup(const wchar_t *, GC_EXTRA_PARAMS) GC_ATTR_NONNULL(1); # ifdef GC_DEBUG # define GC_WCSDUP(s) GC_debug_wcsdup(s, GC_EXTRAS) # else # define GC_WCSDUP(s) GC_wcsdup(s) # endif #endif /* GC_REQUIRE_WCSDUP */ /* Finalization. Some of these primitives are grossly unsafe. */ /* The idea is to make them both cheap, and sufficient to build */ /* a safer layer, closer to Modula-3, Java, or PCedar finalization. */ /* The interface represents my conclusions from a long discussion */ /* with Alan Demers, Dan Greene, Carl Hauser, Barry Hayes, */ /* Christian Jacobi, and Russ Atkinson. It's not perfect, and */ /* probably nobody else agrees with it. Hans-J. Boehm 3/13/92 */ typedef void (GC_CALLBACK * GC_finalization_proc)(void * /* obj */, void * /* client_data */); GC_API void GC_CALL GC_register_finalizer(void * /* obj */, GC_finalization_proc /* fn */, void * /* cd */, GC_finalization_proc * /* ofn */, void ** /* ocd */) GC_ATTR_NONNULL(1); GC_API void GC_CALL GC_debug_register_finalizer(void * /* obj */, GC_finalization_proc /* fn */, void * /* cd */, GC_finalization_proc * /* ofn */, void ** /* ocd */) GC_ATTR_NONNULL(1); /* When obj is no longer accessible, invoke */ /* (*fn)(obj, cd). If a and b are inaccessible, and */ /* a points to b (after disappearing links have been */ /* made to disappear), then only a will be */ /* finalized. (If this does not create any new */ /* pointers to b, then b will be finalized after the */ /* next collection.) Any finalizable object that */ /* is reachable from itself by following one or more */ /* pointers will not be finalized (or collected). */ /* Thus cycles involving finalizable objects should */ /* be avoided, or broken by disappearing links. */ /* All but the last finalizer registered for an object */ /* is ignored. */ /* No-op in the leak-finding mode. */ /* Finalization may be removed by passing 0 as fn. */ /* Finalizers are implicitly unregistered when they are */ /* enqueued for finalization (i.e. become ready to be */ /* finalized). */ /* The old finalizer and client data are stored in */ /* *ofn and *ocd. (ofn and/or ocd may be NULL. */ /* The allocation lock is held while *ofn and *ocd are */ /* updated. In case of error (no memory to register */ /* new finalizer), *ofn and *ocd remain unchanged.) */ /* Fn is never invoked on an accessible object, */ /* provided hidden pointers are converted to real */ /* pointers only if the allocation lock is held, and */ /* such conversions are not performed by finalization */ /* routines. */ /* If GC_register_finalizer is aborted as a result of */ /* a signal, the object may be left with no */ /* finalization, even if neither the old nor new */ /* finalizer were NULL. */ /* Obj should be the starting address of an object */ /* allocated by GC_malloc or friends. Obj may also be */ /* NULL or point to something outside GC heap (in this */ /* case, fn is ignored, *ofn and *ocd are set to NULL). */ /* Note that any garbage collectible object referenced */ /* by cd will be considered accessible until the */ /* finalizer is invoked. */ /* Another versions of the above follow. It ignores */ /* self-cycles, i.e. pointers from a finalizable object to */ /* itself. There is a stylistic argument that this is wrong, */ /* but it's unavoidable for C++, since the compiler may */ /* silently introduce these. It's also benign in that specific */ /* case. And it helps if finalizable objects are split to */ /* avoid cycles. */ /* Note that cd will still be viewed as accessible, even if it */ /* refers to the object itself. */ GC_API void GC_CALL GC_register_finalizer_ignore_self(void * /* obj */, GC_finalization_proc /* fn */, void * /* cd */, GC_finalization_proc * /* ofn */, void ** /* ocd */) GC_ATTR_NONNULL(1); GC_API void GC_CALL GC_debug_register_finalizer_ignore_self(void * /* obj */, GC_finalization_proc /* fn */, void * /* cd */, GC_finalization_proc * /* ofn */, void ** /* ocd */) GC_ATTR_NONNULL(1); /* Another version of the above. It ignores all cycles. */ /* It should probably only be used by Java implementations. */ /* Note that cd will still be viewed as accessible, even if it */ /* refers to the object itself. */ GC_API void GC_CALL GC_register_finalizer_no_order(void * /* obj */, GC_finalization_proc /* fn */, void * /* cd */, GC_finalization_proc * /* ofn */, void ** /* ocd */) GC_ATTR_NONNULL(1); GC_API void GC_CALL GC_debug_register_finalizer_no_order(void * /* obj */, GC_finalization_proc /* fn */, void * /* cd */, GC_finalization_proc * /* ofn */, void ** /* ocd */) GC_ATTR_NONNULL(1); /* This is a special finalizer that is useful when an object's */ /* finalizer must be run when the object is known to be no */ /* longer reachable, not even from other finalizable objects. */ /* It behaves like "normal" finalization, except that the */ /* finalizer is not run while the object is reachable from */ /* other objects specifying unordered finalization. */ /* Effectively it allows an object referenced, possibly */ /* indirectly, from an unordered finalizable object to override */ /* the unordered finalization request. */ /* This can be used in combination with finalizer_no_order so */ /* as to release resources that must not be released while an */ /* object can still be brought back to life by other */ /* finalizers. */ /* Only works if GC_java_finalization is set. Probably only */ /* of interest when implementing a language that requires */ /* unordered finalization (e.g. Java, C#). */ GC_API void GC_CALL GC_register_finalizer_unreachable(void * /* obj */, GC_finalization_proc /* fn */, void * /* cd */, GC_finalization_proc * /* ofn */, void ** /* ocd */) GC_ATTR_NONNULL(1); GC_API void GC_CALL GC_debug_register_finalizer_unreachable(void * /* obj */, GC_finalization_proc /* fn */, void * /* cd */, GC_finalization_proc * /* ofn */, void ** /* ocd */) GC_ATTR_NONNULL(1); #define GC_NO_MEMORY 2 /* Failure due to lack of memory. */ /* The following routine may be used to break cycles between */ /* finalizable objects, thus causing cyclic finalizable */ /* objects to be finalized in the correct order. Standard */ /* use involves calling GC_register_disappearing_link(&p), */ /* where p is a pointer that is not followed by finalization */ /* code, and should not be considered in determining */ /* finalization order. */ GC_API int GC_CALL GC_register_disappearing_link(void ** /* link */) GC_ATTR_NONNULL(1); /* Link should point to a field of a heap allocated */ /* object obj. *link will be cleared when obj is */ /* found to be inaccessible. This happens BEFORE any */ /* finalization code is invoked, and BEFORE any */ /* decisions about finalization order are made. */ /* This is useful in telling the finalizer that */ /* some pointers are not essential for proper */ /* finalization. This may avoid finalization cycles. */ /* Note that obj may be resurrected by another */ /* finalizer, and thus the clearing of *link may */ /* be visible to non-finalization code. */ /* There's an argument that an arbitrary action should */ /* be allowed here, instead of just clearing a pointer. */ /* But this causes problems if that action alters, or */ /* examines connectivity. Returns GC_DUPLICATE if link */ /* was already registered, GC_SUCCESS if registration */ /* succeeded, GC_NO_MEMORY if it failed for lack of */ /* memory, and GC_oom_fn did not handle the problem. */ /* Only exists for backward compatibility. See below: */ GC_API int GC_CALL GC_general_register_disappearing_link(void ** /* link */, const void * /* obj */) GC_ATTR_NONNULL(1) GC_ATTR_NONNULL(2); /* A slight generalization of the above. *link is */ /* cleared when obj first becomes inaccessible. This */ /* can be used to implement weak pointers easily and */ /* safely. Typically link will point to a location */ /* holding a disguised pointer to obj. (A pointer */ /* inside an "atomic" object is effectively disguised.) */ /* In this way, weak pointers are broken before any */ /* object reachable from them gets finalized. */ /* Each link may be registered only with one obj value, */ /* i.e. all objects but the last one (link registered */ /* with) are ignored. This was added after a long */ /* email discussion with John Ellis. */ /* link must be non-NULL (and be properly aligned). */ /* obj must be a pointer to the first word of an object */ /* allocated by GC_malloc or friends. A link */ /* disappears when it is unregistered manually, or when */ /* (*link) is cleared, or when the object containing */ /* this link is garbage collected. It is unsafe to */ /* explicitly deallocate the object containing link. */ /* Explicit deallocation of obj may or may not cause */ /* link to eventually be cleared. */ /* No-op in the leak-finding mode. */ /* This function can be used to implement certain types */ /* of weak pointers. Note, however, this generally */ /* requires that the allocation lock is held (see */ /* GC_call_with_alloc_lock() below) when the disguised */ /* pointer is accessed. Otherwise a strong pointer */ /* could be recreated between the time the collector */ /* decides to reclaim the object and the link is */ /* cleared. Returns GC_SUCCESS if registration */ /* succeeded (a new link is registered), GC_DUPLICATE */ /* if link was already registered (with some object), */ /* GC_NO_MEMORY if registration failed for lack of */ /* memory (and GC_oom_fn did not handle the problem), */ /* GC_UNIMPLEMENTED if GC_find_leak is true. */ GC_API int GC_CALL GC_move_disappearing_link(void ** /* link */, void ** /* new_link */) GC_ATTR_NONNULL(2); /* Moves a link previously registered via */ /* GC_general_register_disappearing_link (or */ /* GC_register_disappearing_link). Does not change the */ /* target object of the weak reference. Does not */ /* change (*new_link) content. May be called with */ /* new_link equal to link (to check whether link has */ /* been registered). Returns GC_SUCCESS on success, */ /* GC_DUPLICATE if there is already another */ /* disappearing link at the new location (never */ /* returned if new_link is equal to link), GC_NOT_FOUND */ /* if no link is registered at the original location. */ GC_API int GC_CALL GC_unregister_disappearing_link(void ** /* link */); /* Undoes a registration by either of the above two */ /* routines. Returns 0 if link was not actually */ /* registered (otherwise returns 1). */ GC_API int GC_CALL GC_register_long_link(void ** /* link */, const void * /* obj */) GC_ATTR_NONNULL(1) GC_ATTR_NONNULL(2); /* Similar to GC_general_register_disappearing_link but */ /* *link only gets cleared when obj becomes truly */ /* inaccessible. An object becomes truly inaccessible */ /* when it can no longer be resurrected from its */ /* finalizer (e.g. by assigning itself to a pointer */ /* traceable from root). This can be used to implement */ /* long weak pointers easily and safely. */ GC_API int GC_CALL GC_move_long_link(void ** /* link */, void ** /* new_link */) GC_ATTR_NONNULL(2); /* Similar to GC_move_disappearing_link but for a link */ /* previously registered via GC_register_long_link. */ GC_API int GC_CALL GC_unregister_long_link(void ** /* link */); /* Similar to GC_unregister_disappearing_link but for a */ /* registration by either of the above two routines. */ /* Support of toggle-ref style of external memory management */ /* without hooking up to the host retain/release machinery. */ /* The idea of toggle-ref is that an external reference to */ /* an object is kept and it can be either a strong or weak */ /* reference; a weak reference is used when the external peer */ /* has no interest in the object, and a strong otherwise. */ typedef enum { GC_TOGGLE_REF_DROP, GC_TOGGLE_REF_STRONG, GC_TOGGLE_REF_WEAK } GC_ToggleRefStatus; /* The callback is to decide (return) the new state of a given */ /* object. Invoked by the collector for all objects registered */ /* for toggle-ref processing. Invoked with the allocation lock */ /* held (but the "world" is running). */ typedef GC_ToggleRefStatus (GC_CALLBACK *GC_toggleref_func)(void * /* obj */); /* Set (register) a callback that decides the state of a given */ /* object (by, probably, inspecting its native state). */ /* The argument may be 0 (means no callback). Both the setter */ /* and the getter acquire the allocation lock (to avoid data */ /* races). */ GC_API void GC_CALL GC_set_toggleref_func(GC_toggleref_func); GC_API GC_toggleref_func GC_CALL GC_get_toggleref_func(void); /* Register a given object for toggle-ref processing. It will */ /* be stored internally and the toggle-ref callback will be */ /* invoked on the object until the callback returns */ /* GC_TOGGLE_REF_DROP or the object is collected. If is_strong */ /* is true then the object is registered with a strong ref, */ /* a weak one otherwise. Returns GC_SUCCESS if registration */ /* succeeded (or no callback registered yet), GC_NO_MEMORY if */ /* it failed for lack of memory. */ GC_API int GC_CALL GC_toggleref_add(void * /* obj */, int /* is_strong */) GC_ATTR_NONNULL(1); /* Finalizer callback support. Invoked by the collector (with */ /* the allocation lock held) for each unreachable object */ /* enqueued for finalization. */ typedef void (GC_CALLBACK * GC_await_finalize_proc)(void * /* obj */); GC_API void GC_CALL GC_set_await_finalize_proc(GC_await_finalize_proc); GC_API GC_await_finalize_proc GC_CALL GC_get_await_finalize_proc(void); /* Zero means no callback. The setter */ /* and getter acquire the lock too. */ /* Returns !=0 if GC_invoke_finalizers has something to do. */ /* Does not use any synchronization. */ GC_API int GC_CALL GC_should_invoke_finalizers(void); GC_API int GC_CALL GC_invoke_finalizers(void); /* Run finalizers for all objects that are ready to */ /* be finalized. Return the number of finalizers */ /* that were run. Normally this is also called */ /* implicitly during some allocations. If */ /* GC_finalize_on_demand is nonzero, it must be called */ /* explicitly. */ /* Explicitly tell the collector that an object is reachable */ /* at a particular program point. This prevents the argument */ /* pointer from being optimized away, even it is otherwise no */ /* longer needed. It should have no visible effect in the */ /* absence of finalizers or disappearing links. But it may be */ /* needed to prevent finalizers from running while the */ /* associated external resource is still in use. */ /* The function is sometimes called keep_alive in other */ /* settings. */ #if defined(__GNUC__) && !defined(__INTEL_COMPILER) # define GC_reachable_here(ptr) \ __asm__ __volatile__(" " : : "X"(ptr) : "memory") #else GC_API void GC_CALL GC_noop1(GC_word); # ifdef LINT2 # define GC_reachable_here(ptr) GC_noop1(~(GC_word)(ptr)^(~(GC_word)0)) /* The expression matches the one of COVERT_DATAFLOW(). */ # else # define GC_reachable_here(ptr) GC_noop1((GC_word)(ptr)) # endif #endif /* GC_set_warn_proc can be used to redirect or filter warning messages. */ /* p may not be a NULL pointer. msg is printf format string (arg must */ /* match the format). Both the setter and the getter acquire the GC */ /* lock (to avoid data races). In version 7.1 (and before), the setter */ /* returned the old warn_proc value. */ typedef void (GC_CALLBACK * GC_warn_proc)(char * /* msg */, GC_word /* arg */); GC_API void GC_CALL GC_set_warn_proc(GC_warn_proc /* p */) GC_ATTR_NONNULL(1); /* GC_get_warn_proc returns the current warn_proc. */ GC_API GC_warn_proc GC_CALL GC_get_warn_proc(void); /* GC_ignore_warn_proc may be used as an argument for GC_set_warn_proc */ /* to suppress all warnings (unless statistics printing is turned on). */ GC_API void GC_CALLBACK GC_ignore_warn_proc(char *, GC_word); /* Change file descriptor of GC log. Unavailable on some targets. */ GC_API void GC_CALL GC_set_log_fd(int); /* abort_func is invoked on GC fatal aborts (just before OS-dependent */ /* abort or exit(1) is called). Must be non-NULL. The default one */ /* outputs msg to stderr provided msg is non-NULL. msg is NULL if */ /* invoked before exit(1) otherwise msg is non-NULL (i.e., if invoked */ /* before abort). Both the setter and getter acquire the GC lock. */ /* Both the setter and getter are defined only if the library has been */ /* compiled without SMALL_CONFIG. */ typedef void (GC_CALLBACK * GC_abort_func)(const char * /* msg */); GC_API void GC_CALL GC_set_abort_func(GC_abort_func) GC_ATTR_NONNULL(1); GC_API GC_abort_func GC_CALL GC_get_abort_func(void); /* A portable way to abort the application because of not enough memory.*/ GC_API void GC_CALL GC_abort_on_oom(void); /* The following is intended to be used by a higher level */ /* (e.g. Java-like) finalization facility. It is expected */ /* that finalization code will arrange for hidden pointers to */ /* disappear. Otherwise objects can be accessed after they */ /* have been collected. */ /* Should not be used in the leak-finding mode. */ /* Note that putting pointers in atomic objects or in */ /* non-pointer slots of "typed" objects is equivalent to */ /* disguising them in this way, and may have other advantages. */ typedef GC_word GC_hidden_pointer; #define GC_HIDE_POINTER(p) (~(GC_hidden_pointer)(p)) /* Converting a hidden pointer to a real pointer requires verifying */ /* that the object still exists. This involves acquiring the */ /* allocator lock to avoid a race with the collector. */ #define GC_REVEAL_POINTER(p) ((void *)GC_HIDE_POINTER(p)) #if defined(I_HIDE_POINTERS) || defined(GC_I_HIDE_POINTERS) /* This exists only for compatibility (the GC-prefixed symbols are */ /* preferred for new code). */ # define HIDE_POINTER(p) GC_HIDE_POINTER(p) # define REVEAL_POINTER(p) GC_REVEAL_POINTER(p) #endif typedef void * (GC_CALLBACK * GC_fn_type)(void * /* client_data */); GC_API void * GC_CALL GC_call_with_alloc_lock(GC_fn_type /* fn */, void * /* client_data */) GC_ATTR_NONNULL(1); /* These routines are intended to explicitly notify the collector */ /* of new threads. Often this is unnecessary because thread creation */ /* is implicitly intercepted by the collector, using header-file */ /* defines, or linker-based interception. In the long run the intent */ /* is to always make redundant registration safe. In the short run, */ /* this is being implemented a platform at a time. */ /* The interface is complicated by the fact that we probably will not */ /* ever be able to automatically determine the stack base for thread */ /* stacks on all platforms. */ /* Structure representing the base of a thread stack. On most */ /* platforms this contains just a single address. */ struct GC_stack_base { void * mem_base; /* Base of memory stack. */ # if defined(__ia64) || defined(__ia64__) || defined(_M_IA64) void * reg_base; /* Base of separate register stack. */ # endif }; typedef void * (GC_CALLBACK * GC_stack_base_func)( struct GC_stack_base * /* sb */, void * /* arg */); /* Call a function with a stack base structure corresponding to */ /* somewhere in the GC_call_with_stack_base frame. This often can */ /* be used to provide a sufficiently accurate stack base. And we */ /* implement it everywhere. */ GC_API void * GC_CALL GC_call_with_stack_base(GC_stack_base_func /* fn */, void * /* arg */) GC_ATTR_NONNULL(1); #define GC_SUCCESS 0 #define GC_DUPLICATE 1 /* Was already registered. */ #define GC_NO_THREADS 2 /* No thread support in GC. */ /* GC_NO_THREADS is not returned by any GC function anymore. */ #define GC_UNIMPLEMENTED 3 /* Not yet implemented on this platform. */ #define GC_NOT_FOUND 4 /* Requested link not found (returned */ /* by GC_move_disappearing_link). */ #if defined(GC_DARWIN_THREADS) || defined(GC_WIN32_THREADS) /* Use implicit thread registration and processing (via Win32 DllMain */ /* or Darwin task_threads). Deprecated. Must be called before */ /* GC_INIT() and other GC routines. Should be avoided if */ /* GC_pthread_create, GC_beginthreadex (or GC_CreateThread) could be */ /* called instead. Disables parallelized GC on Win32. */ GC_API void GC_CALL GC_use_threads_discovery(void); #endif #ifdef GC_THREADS /* Suggest the GC to use the specific signal to suspend threads. */ /* Has no effect after GC_init and on non-POSIX systems. */ GC_API void GC_CALL GC_set_suspend_signal(int); /* Suggest the GC to use the specific signal to resume threads. */ /* Has no effect after GC_init and on non-POSIX systems. */ GC_API void GC_CALL GC_set_thr_restart_signal(int); /* Return the signal number (constant after initialization) used by */ /* the GC to suspend threads on POSIX systems. Return -1 otherwise. */ GC_API int GC_CALL GC_get_suspend_signal(void); /* Return the signal number (constant after initialization) used by */ /* the garbage collector to restart (resume) threads on POSIX */ /* systems. Return -1 otherwise. */ GC_API int GC_CALL GC_get_thr_restart_signal(void); /* Start the parallel marker threads, if available. Useful, e.g., */ /* after POSIX fork in a child process (provided not followed by */ /* exec) or in single-threaded clients (provided it is OK for the */ /* client to perform marking in parallel). Acquires the GC lock to */ /* avoid a data race. */ GC_API void GC_CALL GC_start_mark_threads(void); /* Explicitly enable GC_register_my_thread() invocation. */ /* Done implicitly if a GC thread-creation function is called (or */ /* implicit thread registration is activated, or the collector is */ /* compiled with GC_ALWAYS_MULTITHREADED defined). Otherwise, it */ /* must be called from the main (or any previously registered) thread */ /* between the collector initialization and the first explicit */ /* registering of a thread (it should be called as late as possible). */ /* Includes a GC_start_mark_threads() call. */ GC_API void GC_CALL GC_allow_register_threads(void); /* Register the current thread, with the indicated stack base, as */ /* a new thread whose stack(s) should be traced by the GC. If it */ /* is not implicitly called by the GC, this must be called before a */ /* thread can allocate garbage collected memory, or assign pointers */ /* to the garbage collected heap. Once registered, a thread will be */ /* stopped during garbage collections. */ /* This call must be previously enabled (see above). */ /* This should never be called from the main thread, where it is */ /* always done implicitly. This is normally done implicitly if GC_ */ /* functions are called to create the thread, e.g. by including gc.h */ /* (which redefines some system functions) before calling the system */ /* thread creation function. Nonetheless, thread cleanup routines */ /* (e.g., pthread key destructor) typically require manual thread */ /* registering (and unregistering) if pointers to GC-allocated */ /* objects are manipulated inside. */ /* It is also always done implicitly on some platforms if */ /* GC_use_threads_discovery() is called at start-up. Except for the */ /* latter case, the explicit call is normally required for threads */ /* created by third-party libraries. */ /* A manually registered thread requires manual unregistering. */ /* Returns GC_SUCCESS on success, GC_DUPLICATE if already registered. */ GC_API int GC_CALL GC_register_my_thread(const struct GC_stack_base *) GC_ATTR_NONNULL(1); /* Return non-zero (TRUE) if and only if the calling thread is */ /* registered with the garbage collector. */ GC_API int GC_CALL GC_thread_is_registered(void); /* Notify the collector about the stack and the alt-stack of the */ /* current thread. stack_start/size is used to determine the stack */ /* boundaries when a thread is suspended while it is on an alt-stack. */ GC_API void GC_CALL GC_register_altstack(void * /* stack_start */, GC_word /* stack_size */, void * /* altstack_base */, GC_word /* altstack_size */); /* Unregister the current thread. Only an explicitly registered */ /* thread (i.e. for which GC_register_my_thread() returns GC_SUCCESS) */ /* is allowed (and required) to call this function. (As a special */ /* exception, it is also allowed to once unregister the main thread.) */ /* The thread may no longer allocate garbage collected memory or */ /* manipulate pointers to the garbage collected heap after making */ /* this call. Specifically, if it wants to return or otherwise */ /* communicate a pointer to the garbage-collected heap to another */ /* thread, it must do this before calling GC_unregister_my_thread, */ /* most probably by saving it in a global data structure. Must not */ /* be called inside a GC callback function (except for */ /* GC_call_with_stack_base() one). */ GC_API int GC_CALL GC_unregister_my_thread(void); /* Stop/start the world explicitly. Not recommended for general use. */ GC_API void GC_CALL GC_stop_world_external(void); GC_API void GC_CALL GC_start_world_external(void); #endif /* GC_THREADS */ /* Wrapper for functions that are likely to block (or, at least, do not */ /* allocate garbage collected memory and/or manipulate pointers to the */ /* garbage collected heap) for an appreciable length of time. While fn */ /* is running, the collector is said to be in the "inactive" state for */ /* the current thread (this means that the thread is not suspended and */ /* the thread's stack frames "belonging" to the functions in the */ /* "inactive" state are not scanned during garbage collections). It is */ /* assumed that the collector is already initialized and the current */ /* thread is registered. It is allowed for fn to call */ /* GC_call_with_gc_active() (even recursively), thus temporarily */ /* toggling the collector's state back to "active". The latter */ /* technique might be used to make stack scanning more precise (i.e. */ /* scan only stack frames of functions that allocate garbage collected */ /* memory and/or manipulate pointers to the garbage collected heap). */ GC_API void * GC_CALL GC_do_blocking(GC_fn_type /* fn */, void * /* client_data */) GC_ATTR_NONNULL(1); /* Call a function switching to the "active" state of the collector for */ /* the current thread (i.e. the user function is allowed to call any */ /* GC function and/or manipulate pointers to the garbage collected */ /* heap). GC_call_with_gc_active() has the functionality opposite to */ /* GC_do_blocking() one. It is assumed that the collector is already */ /* initialized and the current thread is registered. fn may toggle */ /* the collector thread's state temporarily to "inactive" one by using */ /* GC_do_blocking. GC_call_with_gc_active() often can be used to */ /* provide a sufficiently accurate stack base. */ GC_API void * GC_CALL GC_call_with_gc_active(GC_fn_type /* fn */, void * /* client_data */) GC_ATTR_NONNULL(1); /* Attempt to fill in the GC_stack_base structure with the stack base */ /* for this thread. This appears to be required to implement anything */ /* like the JNI AttachCurrentThread in an environment in which new */ /* threads are not automatically registered with the collector. */ /* It is also unfortunately hard to implement well on many platforms. */ /* Returns GC_SUCCESS or GC_UNIMPLEMENTED. This function acquires the */ /* GC lock on some platforms. */ GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *) GC_ATTR_NONNULL(1); /* The following routines are primarily intended for use with a */ /* preprocessor which inserts calls to check C pointer arithmetic. */ /* They indicate failure by invoking the corresponding _print_proc. */ /* Check that p and q point to the same object. */ /* Fail conspicuously if they don't. */ /* Returns the first argument. */ /* Succeeds if neither p nor q points to the heap. */ /* May succeed if both p and q point to between heap objects. */ GC_API void * GC_CALL GC_same_obj(void * /* p */, void * /* q */); /* Checked pointer pre- and post- increment operations. Note that */ /* the second argument is in units of bytes, not multiples of the */ /* object size. This should either be invoked from a macro, or the */ /* call should be automatically generated. */ GC_API void * GC_CALL GC_pre_incr(void **, ptrdiff_t /* how_much */) GC_ATTR_NONNULL(1); GC_API void * GC_CALL GC_post_incr(void **, ptrdiff_t /* how_much */) GC_ATTR_NONNULL(1); /* Check that p is visible */ /* to the collector as a possibly pointer containing location. */ /* If it isn't fail conspicuously. */ /* Returns the argument in all cases. May erroneously succeed */ /* in hard cases. (This is intended for debugging use with */ /* untyped allocations. The idea is that it should be possible, though */ /* slow, to add such a call to all indirect pointer stores.) */ /* Currently useless for multi-threaded worlds. */ GC_API void * GC_CALL GC_is_visible(void * /* p */); /* Check that if p is a pointer to a heap page, then it points to */ /* a valid displacement within a heap object. */ /* Fail conspicuously if this property does not hold. */ /* Uninteresting with GC_all_interior_pointers. */ /* Always returns its argument. */ GC_API void * GC_CALL GC_is_valid_displacement(void * /* p */); /* Explicitly dump the GC state. This is most often called from the */ /* debugger, or by setting the GC_DUMP_REGULARLY environment variable, */ /* but it may be useful to call it from client code during debugging. */ /* The current collection number is printed in the header of the dump. */ /* Acquires the GC lock to avoid data races. */ /* Defined only if the library has been compiled without NO_DEBUGGING. */ GC_API void GC_CALL GC_dump(void); /* The same as GC_dump but allows to specify the name of dump and does */ /* not acquire the lock. If name is non-NULL, it is printed to help */ /* identifying individual dumps. Otherwise the current collection */ /* number is used as the name. */ /* Defined only if the library has been compiled without NO_DEBUGGING. */ GC_API void GC_CALL GC_dump_named(const char * /* name */); /* Dump information about each block of every GC memory section. */ /* Defined only if the library has been compiled without NO_DEBUGGING. */ GC_API void GC_CALL GC_dump_regions(void); /* Dump information about every registered disappearing link and */ /* finalizable object. */ /* Defined only if the library has been compiled without NO_DEBUGGING. */ GC_API void GC_CALL GC_dump_finalization(void); /* Safer, but slow, pointer addition. Probably useful mainly with */ /* a preprocessor. Useful only for heap pointers. */ /* Only the macros without trailing digits are meant to be used */ /* by clients. These are designed to model the available C pointer */ /* arithmetic expressions. */ /* Even then, these are probably more useful as */ /* documentation than as part of the API. */ /* Note that GC_PTR_ADD evaluates the first argument more than once. */ #if defined(GC_DEBUG) && defined(__GNUC__) # define GC_PTR_ADD3(x, n, type_of_result) \ ((type_of_result)GC_same_obj((x)+(n), (x))) # define GC_PRE_INCR3(x, n, type_of_result) \ ((type_of_result)GC_pre_incr((void **)(&(x)), (n)*sizeof(*x))) # define GC_POST_INCR3(x, n, type_of_result) \ ((type_of_result)GC_post_incr((void **)(&(x)), (n)*sizeof(*x))) # define GC_PTR_ADD(x, n) GC_PTR_ADD3(x, n, __typeof__(x)) # define GC_PRE_INCR(x, n) GC_PRE_INCR3(x, n, __typeof__(x)) # define GC_POST_INCR(x) GC_POST_INCR3(x, 1, __typeof__(x)) # define GC_POST_DECR(x) GC_POST_INCR3(x, -1, __typeof__(x)) #else /* !GC_DEBUG || !__GNUC__ */ /* We can't do this right without typeof, which ANSI decided was not */ /* sufficiently useful. Without it we resort to the non-debug version. */ /* TODO: This should eventually support C++0x decltype. */ # define GC_PTR_ADD(x, n) ((x)+(n)) # define GC_PRE_INCR(x, n) ((x) += (n)) # define GC_POST_INCR(x) ((x)++) # define GC_POST_DECR(x) ((x)--) #endif /* !GC_DEBUG || !__GNUC__ */ /* Safer assignment of a pointer to a non-stack location. */ #ifdef GC_DEBUG # define GC_PTR_STORE(p, q) \ (*(void **)GC_is_visible((void *)(p)) = \ GC_is_valid_displacement((void *)(q))) #else # define GC_PTR_STORE(p, q) (*(void **)(p) = (void *)(q)) #endif /* GC_PTR_STORE_AND_DIRTY(p,q) is equivalent to GC_PTR_STORE(p,q) */ /* followed by GC_END_STUBBORN_CHANGE(p) and GC_reachable_here(q) */ /* (assuming p and q do not have side effects). */ GC_API void GC_CALL GC_ptr_store_and_dirty(void * /* p */, const void * /* q */); GC_API void GC_CALL GC_debug_ptr_store_and_dirty(void * /* p */, const void * /* q */); /* Functions called to report pointer checking errors */ GC_API void (GC_CALLBACK * GC_same_obj_print_proc)(void * /* p */, void * /* q */); GC_API void (GC_CALLBACK * GC_is_valid_displacement_print_proc)(void *); GC_API void (GC_CALLBACK * GC_is_visible_print_proc)(void *); #ifdef GC_PTHREADS /* For pthread support, we generally need to intercept a number of */ /* thread library calls. We do that here by macro defining them. */ # ifdef __cplusplus } /* extern "C" */ # endif # include "gc_pthread_redirects.h" # ifdef __cplusplus extern "C" { # endif #endif /* This returns a list of objects, linked through their first word. */ /* Its use can greatly reduce lock contention problems, since the */ /* allocation lock can be acquired and released many fewer times. */ GC_API GC_ATTR_MALLOC void * GC_CALL GC_malloc_many(size_t /* lb */); #define GC_NEXT(p) (*(void * *)(p)) /* Retrieve the next element */ /* in returned list. */ /* A filter function to control the scanning of dynamic libraries. */ /* If implemented, called by GC before registering a dynamic library */ /* (discovered by GC) section as a static data root (called only as */ /* a last reason not to register). The filename of the library, the */ /* address and the length of the memory region (section) are passed. */ /* This routine should return nonzero if that region should be scanned. */ /* Always called with the allocation lock held. Depending on the */ /* platform, might be called with the "world" stopped. */ typedef int (GC_CALLBACK * GC_has_static_roots_func)( const char * /* dlpi_name */, void * /* section_start */, size_t /* section_size */); /* Register a new callback (a user-supplied filter) to control the */ /* scanning of dynamic libraries. Replaces any previously registered */ /* callback. May be 0 (means no filtering). May be unused on some */ /* platforms (if the filtering is unimplemented or inappropriate). */ GC_API void GC_CALL GC_register_has_static_roots_callback( GC_has_static_roots_func); #if !defined(CPPCHECK) && !defined(GC_WINDOWS_H_INCLUDED) && defined(WINAPI) /* windows.h is included before gc.h */ # define GC_WINDOWS_H_INCLUDED #endif #if defined(GC_WIN32_THREADS) \ && (!defined(GC_PTHREADS) || defined(GC_BUILD) \ || defined(GC_WINDOWS_H_INCLUDED)) /* Note: for Cygwin and pthreads-win32, this is skipped */ /* unless windows.h is included before gc.h. */ # if (!defined(GC_NO_THREAD_DECLS) || defined(GC_BUILD)) \ && !defined(GC_DONT_INCL_WINDOWS_H) # ifdef __cplusplus } /* Including windows.h in an extern "C" context no longer works. */ # endif # if !defined(_WIN32_WCE) && !defined(__CEGCC__) # include /* For _beginthreadex, _endthreadex */ # endif # if defined(GC_BUILD) || !defined(GC_DONT_INCLUDE_WINDOWS_H) # include # define GC_WINDOWS_H_INCLUDED # endif # ifdef __cplusplus extern "C" { # endif # ifdef GC_UNDERSCORE_STDCALL /* Explicitly prefix exported/imported WINAPI (__stdcall) symbols */ /* with '_' (underscore). Might be useful if MinGW/x86 is used. */ # define GC_CreateThread _GC_CreateThread # define GC_ExitThread _GC_ExitThread # endif # ifndef DECLSPEC_NORETURN /* Typically defined in winnt.h. */ # ifdef GC_WINDOWS_H_INCLUDED # define DECLSPEC_NORETURN /* empty */ # else # define DECLSPEC_NORETURN __declspec(noreturn) # endif # endif # if !defined(_UINTPTR_T) && !defined(_UINTPTR_T_DEFINED) \ && !defined(UINTPTR_MAX) typedef GC_word GC_uintptr_t; # else typedef uintptr_t GC_uintptr_t; # endif # ifdef _WIN64 # define GC_WIN32_SIZE_T GC_uintptr_t # elif defined(GC_WINDOWS_H_INCLUDED) # define GC_WIN32_SIZE_T DWORD # else # define GC_WIN32_SIZE_T unsigned long # endif # ifdef GC_INSIDE_DLL /* Export GC DllMain to be invoked from client DllMain. */ # ifdef GC_UNDERSCORE_STDCALL # define GC_DllMain _GC_DllMain # endif # ifdef GC_WINDOWS_H_INCLUDED GC_API BOOL WINAPI GC_DllMain(HINSTANCE /* inst */, ULONG /* reason */, LPVOID /* reserved */); # else GC_API int __stdcall GC_DllMain(void *, unsigned long, void *); # endif # endif /* GC_INSIDE_DLL */ /* All threads must be created using GC_CreateThread or */ /* GC_beginthreadex, or must explicitly call GC_register_my_thread */ /* (and call GC_unregister_my_thread before thread termination), so */ /* that they will be recorded in the thread table. For backward */ /* compatibility, it is possible to build the GC with GC_DLL */ /* defined, and to call GC_use_threads_discovery. This implicitly */ /* registers all created threads, but appears to be less robust. */ /* Currently the collector expects all threads to fall through and */ /* terminate normally, or call GC_endthreadex() or GC_ExitThread, */ /* so that the thread is properly unregistered. */ # ifdef GC_WINDOWS_H_INCLUDED GC_API HANDLE WINAPI GC_CreateThread( LPSECURITY_ATTRIBUTES /* lpThreadAttributes */, GC_WIN32_SIZE_T /* dwStackSize */, LPTHREAD_START_ROUTINE /* lpStartAddress */, LPVOID /* lpParameter */, DWORD /* dwCreationFlags */, LPDWORD /* lpThreadId */); GC_API DECLSPEC_NORETURN void WINAPI GC_ExitThread( DWORD /* dwExitCode */); # else struct _SECURITY_ATTRIBUTES; GC_API void *__stdcall GC_CreateThread(struct _SECURITY_ATTRIBUTES *, GC_WIN32_SIZE_T, unsigned long (__stdcall *)(void *), void *, unsigned long, unsigned long *); GC_API DECLSPEC_NORETURN void __stdcall GC_ExitThread(unsigned long); # endif # if !defined(_WIN32_WCE) && !defined(__CEGCC__) GC_API GC_uintptr_t GC_CALL GC_beginthreadex( void * /* security */, unsigned /* stack_size */, unsigned (__stdcall *)(void *), void * /* arglist */, unsigned /* initflag */, unsigned * /* thrdaddr */); /* Note: _endthreadex() is not currently marked as no-return in */ /* VC++ and MinGW headers, so we don't mark it neither. */ GC_API void GC_CALL GC_endthreadex(unsigned /* retval */); # endif /* !_WIN32_WCE */ # endif /* !GC_NO_THREAD_DECLS */ # ifdef GC_WINMAIN_REDIRECT /* win32_threads.c implements the real WinMain(), which will start */ /* a new thread to call GC_WinMain() after initializing the garbage */ /* collector. */ # define WinMain GC_WinMain # endif /* For compatibility only. */ # define GC_use_DllMain GC_use_threads_discovery # ifndef GC_NO_THREAD_REDIRECTS # define CreateThread GC_CreateThread # define ExitThread GC_ExitThread # undef _beginthreadex # define _beginthreadex GC_beginthreadex # undef _endthreadex # define _endthreadex GC_endthreadex /* #define _beginthread { > "Please use _beginthreadex instead of _beginthread" < } */ # endif /* !GC_NO_THREAD_REDIRECTS */ #endif /* GC_WIN32_THREADS */ /* Public setter and getter for switching "unmap as much as possible" */ /* mode on(1) and off(0). Has no effect unless unmapping is turned on. */ /* Has no effect on implicitly-initiated garbage collections. Initial */ /* value is controlled by GC_FORCE_UNMAP_ON_GCOLLECT. The setter and */ /* getter are unsynchronized. */ GC_API void GC_CALL GC_set_force_unmap_on_gcollect(int); GC_API int GC_CALL GC_get_force_unmap_on_gcollect(void); /* Fully portable code should call GC_INIT() from the main program */ /* before making any other GC_ calls. On most platforms this is a */ /* no-op and the collector self-initializes. But a number of */ /* platforms make that too hard. */ /* A GC_INIT call is required if the collector is built with */ /* THREAD_LOCAL_ALLOC defined and the initial allocation call is not */ /* to GC_malloc() or GC_malloc_atomic(). */ #if defined(__CYGWIN32__) || defined(__CYGWIN__) /* Similarly gnu-win32 DLLs need explicit initialization from the */ /* main program, as does AIX. */ # ifdef __x86_64__ /* Cygwin/x64 does not add leading underscore to symbols anymore. */ extern int __data_start__[], __data_end__[]; extern int __bss_start__[], __bss_end__[]; # define GC_DATASTART ((GC_word)__data_start__ < (GC_word)__bss_start__ \ ? (void *)__data_start__ : (void *)__bss_start__) # define GC_DATAEND ((GC_word)__data_end__ > (GC_word)__bss_end__ \ ? (void *)__data_end__ : (void *)__bss_end__) # else extern int _data_start__[], _data_end__[], _bss_start__[], _bss_end__[]; # define GC_DATASTART ((GC_word)_data_start__ < (GC_word)_bss_start__ \ ? (void *)_data_start__ : (void *)_bss_start__) # define GC_DATAEND ((GC_word)_data_end__ > (GC_word)_bss_end__ \ ? (void *)_data_end__ : (void *)_bss_end__) # endif /* !__x86_64__ */ # define GC_INIT_CONF_ROOTS GC_add_roots(GC_DATASTART, GC_DATAEND); \ GC_gcollect() /* For blacklisting. */ /* Required at least if GC is in a DLL. And doesn't hurt. */ #elif defined(_AIX) extern int _data[], _end[]; # define GC_DATASTART ((void *)_data) # define GC_DATAEND ((void *)_end) # define GC_INIT_CONF_ROOTS GC_add_roots(GC_DATASTART, GC_DATAEND) #elif (defined(HOST_ANDROID) || defined(__ANDROID__)) \ && defined(IGNORE_DYNAMIC_LOADING) /* This is ugly but seems the only way to register data roots of the */ /* client shared library if the GC dynamic loading support is off. */ # pragma weak __dso_handle extern int __dso_handle[]; GC_API void * GC_CALL GC_find_limit(void * /* start */, int /* up */); # define GC_INIT_CONF_ROOTS (void)(__dso_handle != 0 \ ? (GC_add_roots(__dso_handle, \ GC_find_limit(__dso_handle, \ 1 /*up*/)), 0) : 0) #else # define GC_INIT_CONF_ROOTS /* empty */ #endif #ifdef GC_DONT_EXPAND /* Set GC_dont_expand to TRUE at start-up */ # define GC_INIT_CONF_DONT_EXPAND GC_set_dont_expand(1) #else # define GC_INIT_CONF_DONT_EXPAND /* empty */ #endif #ifdef GC_FORCE_UNMAP_ON_GCOLLECT /* Turn on "unmap as much as possible on explicit GC" mode at start-up */ # define GC_INIT_CONF_FORCE_UNMAP_ON_GCOLLECT \ GC_set_force_unmap_on_gcollect(1) #else # define GC_INIT_CONF_FORCE_UNMAP_ON_GCOLLECT /* empty */ #endif #ifdef GC_DONT_GC /* This is for debugging only (useful if environment variables are */ /* unsupported); cannot call GC_disable as goes before GC_init. */ # define GC_INIT_CONF_MAX_RETRIES (void)(GC_dont_gc = 1) #elif defined(GC_MAX_RETRIES) && !defined(CPPCHECK) /* Set GC_max_retries to the desired value at start-up */ # define GC_INIT_CONF_MAX_RETRIES GC_set_max_retries(GC_MAX_RETRIES) #else # define GC_INIT_CONF_MAX_RETRIES /* empty */ #endif #if defined(GC_FREE_SPACE_DIVISOR) && !defined(CPPCHECK) /* Set GC_free_space_divisor to the desired value at start-up */ # define GC_INIT_CONF_FREE_SPACE_DIVISOR \ GC_set_free_space_divisor(GC_FREE_SPACE_DIVISOR) #else # define GC_INIT_CONF_FREE_SPACE_DIVISOR /* empty */ #endif #if defined(GC_FULL_FREQ) && !defined(CPPCHECK) /* Set GC_full_freq to the desired value at start-up */ # define GC_INIT_CONF_FULL_FREQ GC_set_full_freq(GC_FULL_FREQ) #else # define GC_INIT_CONF_FULL_FREQ /* empty */ #endif #if defined(GC_TIME_LIMIT) && !defined(CPPCHECK) /* Set GC_time_limit to the desired value at start-up */ # define GC_INIT_CONF_TIME_LIMIT GC_set_time_limit(GC_TIME_LIMIT) #else # define GC_INIT_CONF_TIME_LIMIT /* empty */ #endif #if defined(GC_SIG_SUSPEND) && defined(GC_THREADS) && !defined(CPPCHECK) # define GC_INIT_CONF_SUSPEND_SIGNAL GC_set_suspend_signal(GC_SIG_SUSPEND) #else # define GC_INIT_CONF_SUSPEND_SIGNAL /* empty */ #endif #if defined(GC_SIG_THR_RESTART) && defined(GC_THREADS) && !defined(CPPCHECK) # define GC_INIT_CONF_THR_RESTART_SIGNAL \ GC_set_thr_restart_signal(GC_SIG_THR_RESTART) #else # define GC_INIT_CONF_THR_RESTART_SIGNAL /* empty */ #endif #if defined(GC_MAXIMUM_HEAP_SIZE) && !defined(CPPCHECK) /* Limit the heap size to the desired value (useful for debugging). */ /* The limit could be overridden either at the program start-up by */ /* the similar environment variable or anytime later by the */ /* corresponding API function call. */ # define GC_INIT_CONF_MAXIMUM_HEAP_SIZE \ GC_set_max_heap_size(GC_MAXIMUM_HEAP_SIZE) #else # define GC_INIT_CONF_MAXIMUM_HEAP_SIZE /* empty */ #endif #ifdef GC_IGNORE_WARN /* Turn off all warnings at start-up (after GC initialization) */ # define GC_INIT_CONF_IGNORE_WARN GC_set_warn_proc(GC_ignore_warn_proc) #else # define GC_INIT_CONF_IGNORE_WARN /* empty */ #endif #if defined(GC_INITIAL_HEAP_SIZE) && !defined(CPPCHECK) /* Set heap size to the desired value at start-up */ # define GC_INIT_CONF_INITIAL_HEAP_SIZE \ { size_t heap_size = GC_get_heap_size(); \ if (heap_size < (GC_INITIAL_HEAP_SIZE)) \ (void)GC_expand_hp((GC_INITIAL_HEAP_SIZE) - heap_size); } #else # define GC_INIT_CONF_INITIAL_HEAP_SIZE /* empty */ #endif /* Portable clients should call this at the program start-up. More */ /* over, some platforms require this call to be done strictly from the */ /* primordial thread. Multiple invocations are harmless. */ #define GC_INIT() { GC_INIT_CONF_DONT_EXPAND; /* pre-init */ \ GC_INIT_CONF_FORCE_UNMAP_ON_GCOLLECT; \ GC_INIT_CONF_MAX_RETRIES; \ GC_INIT_CONF_FREE_SPACE_DIVISOR; \ GC_INIT_CONF_FULL_FREQ; \ GC_INIT_CONF_TIME_LIMIT; \ GC_INIT_CONF_SUSPEND_SIGNAL; \ GC_INIT_CONF_THR_RESTART_SIGNAL; \ GC_INIT_CONF_MAXIMUM_HEAP_SIZE; \ GC_init(); /* real GC initialization */ \ GC_INIT_CONF_ROOTS; /* post-init */ \ GC_INIT_CONF_IGNORE_WARN; \ GC_INIT_CONF_INITIAL_HEAP_SIZE; } /* win32S may not free all resources on process exit. */ /* This explicitly deallocates the heap. */ GC_API void GC_CALL GC_win32_free_heap(void); #if defined(__SYMBIAN32__) void GC_init_global_static_roots(void); #endif #if defined(_AMIGA) && !defined(GC_AMIGA_MAKINGLIB) /* Allocation really goes through GC_amiga_allocwrapper_do. */ void *GC_amiga_realloc(void *, size_t); # define GC_realloc(a,b) GC_amiga_realloc(a,b) void GC_amiga_set_toany(void (*)(void)); extern int GC_amiga_free_space_divisor_inc; extern void *(*GC_amiga_allocwrapper_do)(size_t, void *(GC_CALL *)(size_t)); # define GC_malloc(a) \ (*GC_amiga_allocwrapper_do)(a,GC_malloc) # define GC_malloc_atomic(a) \ (*GC_amiga_allocwrapper_do)(a,GC_malloc_atomic) # define GC_malloc_uncollectable(a) \ (*GC_amiga_allocwrapper_do)(a,GC_malloc_uncollectable) # define GC_malloc_atomic_uncollectable(a) \ (*GC_amiga_allocwrapper_do)(a,GC_malloc_atomic_uncollectable) # define GC_malloc_ignore_off_page(a) \ (*GC_amiga_allocwrapper_do)(a,GC_malloc_ignore_off_page) # define GC_malloc_atomic_ignore_off_page(a) \ (*GC_amiga_allocwrapper_do)(a,GC_malloc_atomic_ignore_off_page) #endif /* _AMIGA && !GC_AMIGA_MAKINGLIB */ #ifdef __cplusplus } /* extern "C" */ #endif #endif /* GC_H */