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authorUlrich Drepper <drepper@redhat.com>2003-01-03 21:15:43 +0000
committerUlrich Drepper <drepper@redhat.com>2003-01-03 21:15:43 +0000
commit733f25e6d34d8ced182ffd6366d7914d56e71d98 (patch)
tree18b3f08bbfa7cf6c37e254df3824bb24be4c5d35 /nptl/old_pthread_cond_broadcast.c
parent686b7223d5e87538d8bc7eaf9581f4ad11d666f1 (diff)
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Update.
2003-01-03 Jakub Jelinek <jakub@redhat.com> * sysdeps/generic/ldsodefs.h (_dl_allocate_tls, _dl_deallocate_tls): Add rtld_hidden_proto. * sysdeps/generic/dl-tls.c (_dl_deallocate_tls): Add rtld_hidden_def. (_dl_allocate_tls): Likewise. Remove INTDEF.
Diffstat (limited to 'nptl/old_pthread_cond_broadcast.c')
-rw-r--r--nptl/old_pthread_cond_broadcast.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/nptl/old_pthread_cond_broadcast.c b/nptl/old_pthread_cond_broadcast.c
index a9713f5e1b..05f24bb52b 100644
--- a/nptl/old_pthread_cond_broadcast.c
+++ b/nptl/old_pthread_cond_broadcast.c
@@ -20,7 +20,7 @@
#include <errno.h>
#include <stdlib.h>
#include "pthreadP.h"
-#include <lowlevellock.h>
+#include <atomic.h>
#include <shlib-compat.h>
@@ -31,18 +31,19 @@ __pthread_cond_broadcast_2_0 (cond)
{
if (cond->cond == NULL)
{
- lll_mutex_lock (cond->lock);
+ pthread_cond_t *newcond;
- /* Check whether the condvar is still not allocated. */
- if (cond->cond == NULL)
- cond->cond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
+ newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
+ if (newcond == NULL)
+ return ENOMEM;
- lll_mutex_unlock (cond->lock);
+ *newcond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
- if (cond->cond == NULL)
- return ENOMEM;
+ atomic_write_barrier ();
- *cond->cond = (struct pthread_cond_t) PTHREAD_COND_INITIALIZER;
+ if (atomic_compare_and_exchange_acq (&cond->cond, newcond, NULL) != 0)
+ /* Somebody else just initialized the condvar. */
+ free (newcond);
}
return __pthread_cond_broadcast (cond->cond);