nptl/pthread_cond_init.c

   1 /* Copyright (C) 2002-2015 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, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <shlib-compat.h>
  20 #include "pthreadP.h"
  21 #include <stap-probe.h>
  22
  23
  24 int
  25 __pthread_cond_init (pthread_cond_t *cond, const pthread_condattr_t *cond_attr)
  26 {
  27   struct pthread_condattr *icond_attr = (struct pthread_condattr *) cond_attr;
  28
  29   cond->__data.__lock = LLL_LOCK_INITIALIZER;
  30   cond->__data.__futex = 0;
  31   cond->__data.__nwaiters = (icond_attr != NULL
  32                              ? ((icond_attr->value >> 1)
  33                                 & ((1 << COND_NWAITERS_SHIFT) - 1))
  34                              : CLOCK_REALTIME);
  35   cond->__data.__total_seq = 0;
  36   cond->__data.__wakeup_seq = 0;
  37   cond->__data.__woken_seq = 0;
  38   cond->__data.__mutex = (icond_attr == NULL || (icond_attr->value & 1) == 0
  39                           ? NULL : (void *) ~0l);
  40   cond->__data.__broadcast_seq = 0;
  41
  42   LIBC_PROBE (cond_init, 2, cond, cond_attr);
  43
  44   return 0;
  45 }
  46 versioned_symbol (libpthread, __pthread_cond_init,
  47                   pthread_cond_init, GLIBC_2_3_2);