| /* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <errno.h> |
| #include <stdlib.h> |
| #include "pthreadP.h" |
| #include <atomic.h> |
| #include <shlib-compat.h> |
| |
| |
| #if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_3_2) |
| int |
| __pthread_cond_wait_2_0 (cond, mutex) |
| pthread_cond_2_0_t *cond; |
| pthread_mutex_t *mutex; |
| { |
| if (cond->cond == NULL) |
| { |
| pthread_cond_t *newcond; |
| |
| #if LLL_LOCK_INITIALIZER == 0 |
| newcond = (pthread_cond_t *) calloc (sizeof (pthread_cond_t), 1); |
| if (newcond == NULL) |
| return ENOMEM; |
| #else |
| newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t)); |
| if (newcond == NULL) |
| return ENOMEM; |
| |
| /* Initialize the condvar. */ |
| (void) pthread_cond_init (newcond, NULL); |
| #endif |
| |
| if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL)) |
| /* Somebody else just initialized the condvar. */ |
| free (newcond); |
| } |
| |
| return __pthread_cond_wait (cond->cond, mutex); |
| } |
| compat_symbol (libpthread, __pthread_cond_wait_2_0, pthread_cond_wait, |
| GLIBC_2_0); |
| #endif |