1 /* 2 * pthread_barrier_init.c 3 * 4 * Description: 5 * This translation unit implements barrier primitives. 6 * 7 * -------------------------------------------------------------------------- 8 * 9 * Pthreads-win32 - POSIX Threads Library for Win32 10 * Copyright(C) 1998 John E. Bossom 11 * Copyright(C) 1999,2005 Pthreads-win32 contributors 12 * 13 * Contact Email: rpj (at) callisto.canberra.edu.au 14 * 15 * The current list of contributors is contained 16 * in the file CONTRIBUTORS included with the source 17 * code distribution. The list can also be seen at the 18 * following World Wide Web location: 19 * http://sources.redhat.com/pthreads-win32/contributors.html 20 * 21 * This library is free software; you can redistribute it and/or 22 * modify it under the terms of the GNU Lesser General Public 23 * License as published by the Free Software Foundation; either 24 * version 2 of the License, or (at your option) any later version. 25 * 26 * This library is distributed in the hope that it will be useful, 27 * but WITHOUT ANY WARRANTY; without even the implied warranty of 28 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 29 * Lesser General Public License for more details. 30 * 31 * You should have received a copy of the GNU Lesser General Public 32 * License along with this library in the file COPYING.LIB; 33 * if not, write to the Free Software Foundation, Inc., 34 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 35 */ 36 37 #include "pthread.h" 38 #include "implement.h" 39 40 41 int 42 pthread_barrier_init (pthread_barrier_t * barrier, 43 const pthread_barrierattr_t * attr, unsigned int count) 44 { 45 pthread_barrier_t b; 46 47 if (barrier == NULL || count == 0) 48 { 49 return EINVAL; 50 } 51 52 if (NULL != (b = (pthread_barrier_t) calloc (1, sizeof (*b)))) 53 { 54 b->pshared = (attr != NULL && *attr != NULL 55 ? (*attr)->pshared : PTHREAD_PROCESS_PRIVATE); 56 57 b->nCurrentBarrierHeight = b->nInitialBarrierHeight = count; 58 b->lock = 0; 59 60 if (0 == sem_init (&(b->semBarrierBreeched), b->pshared, 0)) 61 { 62 *barrier = b; 63 return 0; 64 } 65 (void) free (b); 66 } 67 68 return ENOMEM; 69 } 70
