2007-09-13 Doug Kwan <dougkwan@google.com>

        * gcc/gthr-posix.h (__gthread_cond_broadcast, __gthread_cond_wait,
        __gthread_cond_wait_recursive): Add to extend interface for POSIX
        conditional variables. (__GTHREAD_HAS_COND): Macro defined to signify
        support of conditional variables.
        * gcc/gthr-posix95.h (__gthread_cond_broadcast, __gthread_cond_wait,
        __gthread_cond_wait_recursive): Add to extend interface for POSIX
        conditional variables. (__GTHREAD_HAS_COND): Macro defined to signify
        support of conditional variables.
        * gcc/gthr-single.h (__gthread_cond_broadcast, __gthread_cond_wait,
        __gthread_cond_wait_recursive): Add to extend interface for POSIX
        conditional variables.
        * gcc/gthr.h: Update comments to document new interface.
        * libstdc++-v3/include/ext/concurrent.h (class __mutex,
        class __recursive_mutex): Add new method gthread_mutex to access
        inner gthread mutex.
        [__GTHREAD_HAS_COND] (class __concurrence_broadcast_error,
        class __concurrence_wait_error, class __cond): Add.
        * guard.cc (recursive_push, recursive_pop): Delete.
        (init_in_progress_flag, set_init_in_progress_flag): Add to
        replace recursive_push and recursive_pop.
        (throw_recursive_init_exception): Add.
        (acquire, __cxa_guard_acquire, __cxa_guard_abort and
        __cxa_guard_release): [__GTHREAD_HAS_COND] Use a conditional
        for synchronization of static variable initialization.
        The global mutex is only held briefly when guards are
        accessed. [!__GTHREAD_HAS_COND] Fall back to the old code,
        which deadlocks.
        * testsuite/thread/guard.cc: Add new test. It deadlocks with the
        old locking code in libstdc++-v3/libsup++/guard.cc.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@129030 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 27 insertions, 2 deletions

diff --git a/gcc/gthr-posix95.h b/gcc/gthr-posix95.h
index f0d1553193e..df250d2bf41 100644
--- a/gcc/gthr-posix95.h
+++ b/gcc/gthr-posix95.h
@@ -45,6 +45,11 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
 typedef pthread_key_t __gthread_key_t;
 typedef pthread_once_t __gthread_once_t;
 typedef pthread_mutex_t __gthread_mutex_t;
+typedef pthread_cond_t __gthread_cond_t;
+
+/* POSIX like conditional variables are supported.  Please look at comments
+   in gthr.h for details. */
+#define __GTHREAD_HAS_COND	1
 
 typedef struct {
   long depth;
@@ -55,6 +60,7 @@ typedef struct {
 #define __GTHREAD_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
 #define __GTHREAD_ONCE_INIT PTHREAD_ONCE_INIT
 #define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
+#define __GTHREAD_COND_INIT PTHREAD_COND_INITIALIZER
 
 #if SUPPORTS_WEAK && GTHREAD_USE_WEAK
 # define __gthrw(name) \
@@ -81,14 +87,14 @@ __gthrw(pthread_mutexattr_init)
 __gthrw(pthread_mutexattr_destroy)
 
 __gthrw(pthread_mutex_init)
+__gthrw(pthread_cond_broadcast)
+__gthrw(pthread_cond_wait)
 
 #if defined(_LIBOBJC) || defined(_LIBOBJC_WEAK)
 /* Objective-C.  */
-__gthrw(pthread_cond_broadcast)
 __gthrw(pthread_cond_destroy)
 __gthrw(pthread_cond_init)
 __gthrw(pthread_cond_signal)
-__gthrw(pthread_cond_wait)
 __gthrw(pthread_exit)
 __gthrw(pthread_mutex_destroy)
 #ifdef _POSIX_PRIORITY_SCHEDULING
@@ -719,6 +725,25 @@ __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
   return 0;
 }
 
+static inline int
+__gthread_cond_broadcast (__gthread_cond_t *cond)
+{
+  return __gthrw_(pthread_cond_broadcast) (cond);
+}
+
+static inline int
+__gthread_cond_wait (__gthread_cond_t *cond, __gthread_mutex_t *mutex)
+{
+  return __gthrw_(pthread_cond_wait) (cond, mutex);
+}
+
+static inline int
+__gthread_cond_wait_recursive (__gthread_cond_t *cond,
+			       __gthread_recursive_mutex_t *mutex)
+{
+  return __gthrw_(pthread_cond_wait) (cond, mutex->actual);
+}
+
 #endif /* _LIBOBJC */
 
 #endif /* ! GCC_GTHR_POSIX_H */