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author | Ulrich Drepper <drepper@redhat.com> | 2003-01-03 21:15:43 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2003-01-03 21:15:43 +0000 |
commit | 733f25e6d34d8ced182ffd6366d7914d56e71d98 (patch) | |
tree | 18b3f08bbfa7cf6c37e254df3824bb24be4c5d35 /nptl/old_pthread_cond_signal.c | |
parent | 686b7223d5e87538d8bc7eaf9581f4ad11d666f1 (diff) | |
download | glibc-733f25e6d34d8ced182ffd6366d7914d56e71d98.zip glibc-733f25e6d34d8ced182ffd6366d7914d56e71d98.tar.gz glibc-733f25e6d34d8ced182ffd6366d7914d56e71d98.tar.bz2 |
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_signal.c')
-rw-r--r-- | nptl/old_pthread_cond_signal.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/nptl/old_pthread_cond_signal.c b/nptl/old_pthread_cond_signal.c index 952ee6d..717a339 100644 --- a/nptl/old_pthread_cond_signal.c +++ b/nptl/old_pthread_cond_signal.c @@ -20,6 +20,7 @@ #include <errno.h> #include <stdlib.h> #include "pthreadP.h" +#include <atomic.h> #include <shlib-compat.h> @@ -30,18 +31,19 @@ __pthread_cond_signal_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_signal (cond->cond); |