diff options
Diffstat (limited to 'gc.h')
| -rw-r--r-- | gc.h | 372 |
1 files changed, 253 insertions, 119 deletions
@@ -11,12 +11,36 @@ * provided the above notices are retained, and a notice that the code was * modified is included with the above copyright notice. */ -/* Boehm, May 19, 1994 2:13 pm PDT */ +/* Boehm, October 9, 1995 1:14 pm PDT */ + +/* + * 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. + * If you are using Solaris threads, look at the end of this file. + * Everything else is best ignored unless you encounter performance + * problems. + */ #ifndef _GC_H # define _GC_H +# if defined(__STDC__) || defined(__cplusplus) +# define GC_PROTO(args) args + typedef void * GC_PTR; +# else +# define GC_PROTO(args) () + typedef char * GC_PTR; +# endif + +# ifdef __cplusplus + extern "C" { +# endif + # include <stddef.h> /* Define word and signed_word to be unsigned and signed types of the */ @@ -70,7 +94,7 @@ extern GC_word GC_free_space_divisor; /* at the expense of space. */ /* GC_free_space_divisor = 1 will effectively */ /* disable collections. */ - + /* Public procedures */ /* @@ -84,17 +108,10 @@ extern GC_word GC_free_space_divisor; * collectable. GC_malloc_uncollectable and GC_free called on the resulting * object implicitly update GC_non_gc_bytes appropriately. */ -#if defined(__STDC__) || defined(__cplusplus) - extern void * GC_malloc(size_t size_in_bytes); - extern void * GC_malloc_atomic(size_t size_in_bytes); - extern void * GC_malloc_uncollectable(size_t size_in_bytes); - extern void * GC_malloc_stubborn(size_t size_in_bytes); -# else - extern char * GC_malloc(/* size_in_bytes */); - extern char * GC_malloc_atomic(/* size_in_bytes */); - extern char * GC_malloc_uncollectable(/* size_in_bytes */); - extern char * GC_malloc_stubborn(/* size_in_bytes */); -# endif +extern GC_PTR GC_malloc GC_PROTO((size_t size_in_bytes)); +extern GC_PTR GC_malloc_atomic GC_PROTO((size_t size_in_bytes)); +extern GC_PTR GC_malloc_uncollectable GC_PROTO((size_t size_in_bytes)); +extern GC_PTR GC_malloc_stubborn GC_PROTO((size_t size_in_bytes)); /* Explicitly deallocate an object. Dangerous if used incorrectly. */ /* Requires a pointer to the base of an object. */ @@ -102,11 +119,7 @@ extern GC_word GC_free_space_divisor; /* An object should not be enable for finalization when it is */ /* explicitly deallocated. */ /* GC_free(0) is a no-op, as required by ANSI C for free. */ -#if defined(__STDC__) || defined(__cplusplus) - extern void GC_free(void * object_addr); -# else - extern void GC_free(/* object_addr */); -# endif +extern void GC_free GC_PROTO((GC_PTR object_addr)); /* * Stubborn objects may be changed only if the collector is explicitly informed. @@ -123,27 +136,19 @@ extern GC_word GC_free_space_divisor; * do so. The same applies to dropping stubborn objects that are still * changeable. */ -void GC_change_stubborn(/* p */); -void GC_end_stubborn_change(/* p */); +extern void GC_change_stubborn GC_PROTO((GC_PTR)); +extern void GC_end_stubborn_change GC_PROTO((GC_PTR)); /* Return a pointer to the base (lowest address) of an object given */ /* a pointer to a location within the object. */ /* Return 0 if displaced_pointer doesn't point to within a valid */ /* object. */ -# if defined(__STDC__) || defined(__cplusplus) - void * GC_base(void * displaced_pointer); -# else - char * GC_base(/* char * displaced_pointer */); -# endif +extern GC_PTR GC_base GC_PROTO((GC_PTR displaced_pointer)); /* 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. */ -# if defined(__STDC__) || defined(__cplusplus) - size_t GC_size(void * object_addr); -# else - size_t GC_size(/* char * object_addr */); -# endif +extern size_t GC_size GC_PROTO((GC_PTR object_addr)); /* For compatibility with C library. This is occasionally faster than */ /* a malloc followed by a bcopy. But if you rely on that, either here */ @@ -153,22 +158,24 @@ void GC_end_stubborn_change(/* p */); /* If the argument is stubborn, the result will have changes enabled. */ /* It is an error to have changes enabled for the original object. */ /* Follows ANSI comventions for NULL old_object. */ -# if defined(__STDC__) || defined(__cplusplus) - extern void * GC_realloc(void * old_object, size_t new_size_in_bytes); -# else - extern char * GC_realloc(/* old_object, new_size_in_bytes */); -# endif - - +extern GC_PTR GC_realloc GC_PROTO((GC_PTR old_object, + size_t new_size_in_bytes)); + /* Explicitly increase the heap size. */ /* Returns 0 on failure, 1 on success. */ -extern int GC_expand_hp(/* number_of_bytes */); +extern int GC_expand_hp GC_PROTO((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. */ +extern void GC_set_max_heap_size GC_PROTO((GC_word n)); -/* Clear the set of root segments */ -extern void GC_clear_roots(); +/* Clear the set of root segments. Wizards only. */ +extern void GC_clear_roots GC_PROTO((void)); -/* Add a root segment */ -extern void GC_add_roots(/* low_address, high_address_plus_1 */); +/* Add a root segment. Wizards only. */ +extern void GC_add_roots GC_PROTO((char * low_address, + char * 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 */ @@ -182,15 +189,33 @@ extern void GC_add_roots(/* low_address, high_address_plus_1 */); /* retention. */ /* This is a no-op if the collector was compiled with recognition of */ /* arbitrary interior pointers enabled, which is now the default. */ -void GC_register_displacement(/* n */); - -/* Explicitly trigger a collection. */ -void GC_gcollect(); +void GC_register_displacement GC_PROTO((GC_word n)); + +/* The following version should be used if any debugging allocation is */ +/* being done. */ +void GC_debug_register_displacement GC_PROTO((GC_word n)); + +/* Explicitly trigger a full, world-stop collection. */ +void GC_gcollect GC_PROTO((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. 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. */ +typedef int (* GC_stop_func) GC_PROTO((void)); +int GC_try_to_collect GC_PROTO((GC_stop_func stop_func)); /* Return the number of bytes in the heap. Excludes collector private */ /* data structures. Includes empty blocks and fragmentation loss. */ /* Includes some pages that were allocated but never written. */ -size_t GC_get_heap_size(); +size_t GC_get_heap_size GC_PROTO((void)); + +/* Return the number of bytes allocated since the last collection. */ +size_t GC_get_bytes_since_gc GC_PROTO((void)); /* Enable incremental/generational collection. */ /* Not advisable unless dirty bits are */ @@ -198,7 +223,16 @@ size_t GC_get_heap_size(); /* pointerfree(atomic) or immutable. */ /* Don't use in leak finding mode. */ /* Ignored if GC_dont_gc is true. */ -void GC_enable_incremental(); +void GC_enable_incremental GC_PROTO((void)); + +/* Perform some garbage collection work, if appropriate. */ +/* Return 0 if there is no more work to be done. */ +/* 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. */ +int GC_collect_a_little GC_PROTO((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 */ @@ -214,41 +248,26 @@ void GC_enable_incremental(); /* 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. */ -# if defined(__STDC__) || defined(__cplusplus) - void * GC_malloc_ignore_off_page(size_t lb); -# else - char * GC_malloc_ignore_off_page(/* size_t lb */); -# endif +extern GC_PTR GC_malloc_ignore_off_page GC_PROTO((size_t lb)); +extern GC_PTR GC_malloc_atomic_ignore_off_page GC_PROTO((size_t lb)); /* Debugging (annotated) allocation. GC_gcollect will check */ /* objects allocated in this way for overwrites, etc. */ -# if defined(__STDC__) || defined(__cplusplus) - extern void * GC_debug_malloc(size_t size_in_bytes, - char * descr_string, int descr_int); - extern void * GC_debug_malloc_atomic(size_t size_in_bytes, - char * descr_string, int descr_int); - extern void * GC_debug_malloc_uncollectable(size_t size_in_bytes, - char * descr_string, int descr_int); - extern void * GC_debug_malloc_stubborn(size_t size_in_bytes, - char * descr_string, int descr_int); - extern void GC_debug_free(void * object_addr); - extern void * GC_debug_realloc(void * old_object, - size_t new_size_in_bytes, - char * descr_string, int descr_int); -# else - extern char * GC_debug_malloc(/* size_in_bytes, descr_string, descr_int */); - extern char * GC_debug_malloc_atomic(/* size_in_bytes, descr_string, - descr_int */); - extern char * GC_debug_malloc_uncollectable(/* size_in_bytes, descr_string, - descr_int */); - extern char * GC_debug_malloc_stubborn(/* size_in_bytes, descr_string, - descr_int */); - extern void GC_debug_free(/* object_addr */); - extern char * GC_debug_realloc(/* old_object, new_size_in_bytes, - descr_string, descr_int */); -# endif -void GC_debug_change_stubborn(/* p */); -void GC_debug_end_stubborn_change(/* p */); +extern GC_PTR GC_debug_malloc + GC_PROTO((size_t size_in_bytes, char * descr_string, int descr_int)); +extern GC_PTR GC_debug_malloc_atomic + GC_PROTO((size_t size_in_bytes, char * descr_string, int descr_int)); +extern GC_PTR GC_debug_malloc_uncollectable + GC_PROTO((size_t size_in_bytes, char * descr_string, int descr_int)); +extern GC_PTR GC_debug_malloc_stubborn + GC_PROTO((size_t size_in_bytes, char * descr_string, int descr_int)); +extern void GC_debug_free GC_PROTO((GC_PTR object_addr)); +extern GC_PTR GC_debug_realloc + GC_PROTO((GC_PTR old_object, size_t new_size_in_bytes, + char * descr_string, int descr_int)); + +void GC_debug_change_stubborn GC_PROTO((GC_PTR)); +void GC_debug_end_stubborn_change GC_PROTO((GC_PTR)); # ifdef GC_DEBUG # define GC_MALLOC(sz) GC_debug_malloc(sz, __FILE__, __LINE__) # define GC_MALLOC_ATOMIC(sz) GC_debug_malloc_atomic(sz, __FILE__, __LINE__) @@ -260,10 +279,17 @@ void GC_debug_end_stubborn_change(/* p */); # define GC_REGISTER_FINALIZER(p, f, d, of, od) \ GC_register_finalizer(GC_base(p), GC_debug_invoke_finalizer, \ GC_make_closure(f,d), of, od) +# define GC_REGISTER_FINALIZER_IGNORE_SELF(p, f, d, of, od) \ + GC_register_finalizer_ignore_self( \ + GC_base(p), GC_debug_invoke_finalizer, \ + GC_make_closure(f,d), of, od) # define GC_MALLOC_STUBBORN(sz) GC_debug_malloc_stubborn(sz, __FILE__, \ __LINE__) # define GC_CHANGE_STUBBORN(p) GC_debug_change_stubborn(p) # define GC_END_STUBBORN_CHANGE(p) GC_debug_end_stubborn_change(p) +# define GC_GENERAL_REGISTER_DISAPPEARING_LINK(link, obj) \ + GC_general_register_disappearing_link(link, GC_base(obj)) +# define GC_REGISTER_DISPLACEMENT(n) GC_debug_register_displacement(n) # else # define GC_MALLOC(sz) GC_malloc(sz) # define GC_MALLOC_ATOMIC(sz) GC_malloc_atomic(sz) @@ -272,9 +298,14 @@ void GC_debug_end_stubborn_change(/* p */); # 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_MALLOC_STUBBORN(sz) GC_malloc_stubborn(sz) # define GC_CHANGE_STUBBORN(p) GC_change_stubborn(p) # define GC_END_STUBBORN_CHANGE(p) GC_end_stubborn_change(p) +# define GC_GENERAL_REGISTER_DISAPPEARING_LINK(link, obj) \ + GC_general_register_disappearing_link(link, obj) +# define GC_REGISTER_DISPLACEMENT(n) GC_register_displacement(n) # endif /* The following are included because they are often convenient, and */ /* reduce the chance for a misspecifed size argument. But calls may */ @@ -292,15 +323,12 @@ void GC_debug_end_stubborn_change(/* p */); /* 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 */ -# if defined(__STDC__) || defined(__cplusplus) - typedef void (*GC_finalization_proc)(void * obj, void * client_data); -# else - typedef void (*GC_finalization_proc)(/* void * obj, void * client_data */); -# endif - -void GC_register_finalizer(/* void * obj, - GC_finalization_proc fn, void * cd, - GC_finalization_proc *ofn, void ** ocd */); +typedef void (*GC_finalization_proc) + GC_PROTO((GC_PTR obj, GC_PTR client_data)); + +extern void GC_register_finalizer + GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd, + GC_finalization_proc *ofn, GC_PTR *ocd)); /* 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 */ @@ -329,7 +357,20 @@ void GC_register_finalizer(/* void * obj, /* finalization, even if neither the old nor new */ /* finalizer were NULL. */ /* Obj should be the nonNULL starting address of an */ - /* object allocated by GC_malloc or friends. */ + /* object allocated by GC_malloc or friends. */ + /* Note that any garbage collectable 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. */ +extern void GC_register_finalizer_ignore_self + GC_PROTO((GC_PTR obj, GC_finalization_proc fn, GC_PTR cd, + GC_finalization_proc *ofn, GC_PTR *ocd)); /* The following routine may be used to break cycles between */ /* finalizable objects, thus causing cyclic finalizable */ @@ -337,8 +378,8 @@ void GC_register_finalizer(/* void * obj, /* 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. */ -int GC_register_disappearing_link(/* void ** link */); +/* finalization order. */ +extern int GC_register_disappearing_link GC_PROTO((GC_PTR * /* link */)); /* 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 */ @@ -357,13 +398,17 @@ int GC_register_disappearing_link(/* void ** link */); /* Returns 1 if link was already registered, 0 */ /* otherwise. */ /* Only exists for backward compatibility. See below: */ -int GC_general_register_disappearing_link(/* void ** link, void * obj */); + +extern int GC_general_register_disappearing_link + GC_PROTO((GC_PTR * /* link */, GC_PTR obj)); /* 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. In this way */ - /* soft pointers are broken before any object */ + /* holding a disguised pointer to obj. (A pointer */ + /* inside an "atomic" object is effectively */ + /* disguised.) In this way soft */ + /* pointers are broken before any object */ /* reachable from them are finalized. Each link */ /* May be registered only once, i.e. with one obj */ /* value. This was added after a long email discussion */ @@ -373,47 +418,118 @@ int GC_general_register_disappearing_link(/* void ** link, void * obj */); /* the object containing link. Explicitly deallocating */ /* obj may or may not cause link to eventually be */ /* cleared. */ -int GC_unregister_disappearing_link(/* void ** link */); +extern int GC_unregister_disappearing_link GC_PROTO((GC_PTR * /* link */)); /* Returns 0 if link was not actually registered. */ /* Undoes a registration by either of the above two */ /* routines. */ /* Auxiliary fns to make finalization work correctly with displaced */ /* pointers introduced by the debugging allocators. */ -# if defined(__STDC__) || defined(__cplusplus) - void * GC_make_closure(GC_finalization_proc fn, void * data); - void GC_debug_invoke_finalizer(void * obj, void * data); -# else - char * GC_make_closure(/* GC_finalization_proc fn, char * data */); - void GC_debug_invoke_finalizer(/* void * obj, void * data */); -# endif +extern GC_PTR GC_make_closure GC_PROTO((GC_finalization_proc fn, GC_PTR data)); +extern void GC_debug_invoke_finalizer GC_PROTO((GC_PTR obj, GC_PTR data)); +/* GC_set_warn_proc can be used to redirect or filter warning messages. */ +typedef void (*GC_warn_proc) GC_PROTO((char *msg, GC_word arg)); +extern GC_warn_proc GC_set_warn_proc GC_PROTO((GC_warn_proc p)); + /* Returns old warning procedure. */ /* The following is intended to be used by a higher level */ /* (e.g. cedar-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. */ -# ifdef I_HIDE_POINTERS -# if defined(__STDC__) || defined(__cplusplus) -# define HIDE_POINTER(p) (~(size_t)(p)) -# define REVEAL_POINTER(p) ((void *)(HIDE_POINTER(p))) -# else -# define HIDE_POINTER(p) (~(unsigned long)(p)) -# define REVEAL_POINTER(p) ((char *)(HIDE_POINTER(p))) -# endif +/* Note that putting pointers in atomic objects or in */ +/* nonpointer slots of "typed" objects is equivalent to */ +/* disguising them in this way, and may have other advantages. */ +# if defined(I_HIDE_POINTERS) || defined(GC_I_HIDE_POINTERS) + typedef GC_word GC_hidden_pointer; +# define HIDE_POINTER(p) (~(GC_hidden_pointer)(p)) +# define REVEAL_POINTER(p) ((GC_PTR)(HIDE_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. */ - -# if defined(__STDC__) || defined(__cplusplus) - typedef void * (*GC_fn_type)(); - void * GC_call_with_alloc_lock(GC_fn_type fn, void * client_data); +# endif /* I_HIDE_POINTERS */ + +typedef GC_PTR (*GC_fn_type) GC_PROTO((GC_PTR client_data)); +extern GC_PTR GC_call_with_alloc_lock + GC_PROTO((GC_fn_type fn, GC_PTR client_data)); + +/* 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. */ +extern GC_PTR GC_same_obj GC_PROTO((GC_PTR p, GC_PTR 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. */ +extern GC_PTR GC_pre_incr GC_PROTO((GC_PTR *p, size_t how_much)); +extern GC_PTR GC_post_incr GC_PROTO((GC_PTR *p, size_t how_much)); + +/* 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 multithreaded worlds. */ +extern GC_PTR GC_is_visible GC_PROTO((GC_PTR 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 ALL_INTERIOR_POINTERS. */ +/* Always returns its argument. */ +extern GC_PTR GC_is_valid_displacement GC_PROTO((GC_PTR p)); + +/* Safer, but slow, pointer addition. Probably useful mainly with */ +/* a preprocessor. Useful only for heap pointers. */ +#ifdef GC_DEBUG +# 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(&(x), (n)*sizeof(*x)) +# define GC_POST_INCR2(x, type_of_result) \ + ((type_of_result)GC_post_incr(&(x), sizeof(*x)) +# ifdef __GNUC__ +# 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, n) \ + GC_POST_INCR3(x, typeof(x)) # else - typedef char * (*GC_fn_type)(); - char * GC_call_with_alloc_lock(/* GC_fn_type fn, char * client_data */); + /* We can't do this right without typeof, which ANSI */ + /* decided was not sufficiently useful. Repeatedly */ + /* mentioning the arguments seems too dangerous to be */ + /* useful. So does not casting the result. */ +# define GC_PTR_ADD(x, n) ((x)+(n)) # endif +#else /* !GC_DEBUG */ +# define GC_PTR_ADD3(x, n, type_of_result) ((x)+(n)) +# define GC_PTR_ADD(x, n) ((x)+(n)) +# define GC_PRE_INCR3(x, n, type_of_result) ((x) += (n)) +# define GC_PRE_INCR(x, n) ((x) += (n)) +# define GC_POST_INCR2(x, n, type_of_result) ((x)++) +# define GC_POST_INCR(x, n) ((x)++) +#endif + +/* Safer assignment of a pointer to a nonstack location. */ +#ifdef GC_DEBUG +# ifdef __STDC__ +# define GC_PTR_STORE(p, q) \ + (*(void **)GC_is_visible(p) = GC_is_valid_displacement(q)) +# else +# define GC_PTR_STORE(p, q) \ + (*(char **)GC_is_visible(p) = GC_is_valid_displacement(q)) # endif +#else /* !GC_DEBUG */ +# define GC_PTR_STORE(p, q) *((p) = (q)) +#endif + #ifdef SOLARIS_THREADS /* We need to intercept calls to many of the threads primitives, so */ @@ -423,6 +539,7 @@ int GC_unregister_disappearing_link(/* void ** link */); /* uncollectable objects, which are deallocated using the destructor */ /* facility in thr_keycreate. */ # include <thread.h> +# include <signal.h> int GC_thr_create(void *stack_base, size_t stack_size, void *(*start_routine)(void *), void *arg, long flags, thread_t *new_thread); @@ -440,10 +557,27 @@ int GC_unregister_disappearing_link(/* void ** link */); /* 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. */ -void * GC_malloc_many(size_t lb); -#define GC_NEXT(p) (*(void **)(p)) /* Retrieve the next element */ +GC_PTR GC_malloc_many(size_t lb); +#define GC_NEXT(p) (*(GC_PTR *)(p)) /* Retrieve the next element */ /* in returned list. */ #endif /* SOLARIS_THREADS */ +/* + * If you are planning on putting + * the collector in a SunOS 5 dynamic library, you need to call GC_INIT() + * from the statically loaded program section. + * This circumvents a Solaris 2.X (X<=4) linker bug. + */ +#if defined(sparc) || defined(__sparc) +# define GC_INIT() { extern end, etext; \ + GC_noop(&end, &etext); } +#else +# define GC_INIT() +#endif + +#ifdef __cplusplus + } /* end of extern "C" */ +#endif + #endif /* _GC_H */ |