1: /* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc.
    2:    This file is part of the GNU C Library.
    3:    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
    4: 
    5:    The GNU C Library is free software; you can redistribute it and/or
    6:    modify it under the terms of the GNU Lesser General Public
    7:    License as published by the Free Software Foundation; either
    8:    version 2.1 of the License, or (at your option) any later version.
    9: 
   10:    The GNU C Library is distributed in the hope that it will be useful,
   11:    but WITHOUT ANY WARRANTY; without even the implied warranty of
   12:    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   13:    Lesser General Public License for more details.
   14: 
   15:    You should have received a copy of the GNU Lesser General Public
   16:    License along with the GNU C Library; if not, write to the Free
   17:    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   18:    02111-1307 USA.  */
   19: 
   20: #include <errno.h>
   21: #include <stdlib.h>
   22: #include "pthreadP.h"
   23: #include <atomic.h>
   24: #include <shlib-compat.h>
   25: 
   26: 
   27: #if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_3_2)
   28: int
   29: __pthread_cond_timedwait_2_0 (cond, mutex, abstime)
   30:      pthread_cond_2_0_t *cond;
   31:      pthread_mutex_t *mutex;
   32:      const struct timespec *abstime;
   33: {
   34:   if (cond->cond == NULL)
   35:     {
   36:       pthread_cond_t *newcond;
   37: 
   38: #if LLL_LOCK_INITIALIZER == 0
   39:       newcond = (pthread_cond_t *) calloc (sizeof (pthread_cond_t), 1);
   40:       if (newcond == NULL)
   41:         return ENOMEM;
   42: #else
   43:       newcond = (pthread_cond_t *) malloc (sizeof (pthread_cond_t));
   44:       if (newcond == NULL)
   45:         return ENOMEM;
   46: 
   47:       /* Initialize the condvar.  */
   48:       (void) pthread_cond_init (newcond, NULL);
   49: #endif
   50: 
   51:       if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL))
   52:         /* Somebody else just initialized the condvar.  */
   53:         free (newcond);
   54:     }
   55: 
   56:   return __pthread_cond_timedwait (cond->cond, mutex, abstime);
   57: }
   58: compat_symbol (libpthread, __pthread_cond_timedwait_2_0,
   59:                pthread_cond_timedwait, GLIBC_2_0);
   60: #endif