diff options
Diffstat (limited to 'nptl/pthread_cond_destroy.c')
| -rw-r--r-- | nptl/pthread_cond_destroy.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/nptl/pthread_cond_destroy.c b/nptl/pthread_cond_destroy.c index 5ade3e63db..0208d18ce4 100644 --- a/nptl/pthread_cond_destroy.c +++ b/nptl/pthread_cond_destroy.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -17,6 +17,7 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ +#include <errno.h> #include <shlib-compat.h> #include "pthreadP.h" @@ -25,6 +26,35 @@ int __pthread_cond_destroy (cond) pthread_cond_t *cond; { + /* Make sure we are alone. */ + lll_mutex_lock (cond->__data.__lock); + + if (cond->__data.__total_seq > cond->__data.__wakeup_seq) + { + /* If there are still some waiters which have not been + woken up, this is an application bug. */ + lll_mutex_unlock (cond->__data.__lock); + return EBUSY; + } + + /* Tell pthread_cond_*wait that this condvar is being destroyed. */ + cond->__data.__total_seq = -1ULL; + + /* If there are waiters which have been already signalled or + broadcasted, but still are using the pthread_cond_t structure, + pthread_cond_destroy needs to wait for them. */ + unsigned int nwaiters = cond->__data.__nwaiters; + while (nwaiters >= (1 << COND_CLOCK_BITS)) + { + lll_mutex_unlock (cond->__data.__lock); + + lll_futex_wait (&cond->__data.__nwaiters, nwaiters); + + lll_mutex_lock (cond->__data.__lock); + + nwaiters = cond->__data.__nwaiters; + } + return 0; } versioned_symbol (libpthread, __pthread_cond_destroy, |