diff options
author | rpj <rpj> | 2002-02-18 03:16:52 +0000 |
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committer | rpj <rpj> | 2002-02-18 03:16:52 +0000 |
commit | a416ab17ecf9f2cb0f1e3f7bd645a8d1ce690ca2 (patch) | |
tree | 72f776cd64e48824a5578ff7a523bc69097143b4 /barrier_init.c | |
parent | e6f1797e9e9925ae7f9dda54806ef8f52ae3ed07 (diff) |
Major reorganisation of source code; new routine and tests added.
Diffstat (limited to 'barrier_init.c')
-rw-r--r-- | barrier_init.c | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/barrier_init.c b/barrier_init.c deleted file mode 100644 index 865a82a..0000000 --- a/barrier_init.c +++ /dev/null @@ -1,84 +0,0 @@ -/* - * barrier_init.c - * - * Description: - * This translation unit implements barrier primitives. - * - * -------------------------------------------------------------------------- - * - * Pthreads-win32 - POSIX Threads Library for Win32 - * Copyright(C) 1998 John E. Bossom - * Copyright(C) 1999,2002 Pthreads-win32 contributors - * - * Contact Email: rpj@ise.canberra.edu.au - * - * The current list of contributors is contained - * in the file CONTRIBUTORS included with the source - * code distribution. The list can also be seen at the - * following World Wide Web location: - * http://sources.redhat.com/pthreads-win32/contributors.html - * - * This 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 of the License, or (at your option) any later version. - * - * This 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 this library in the file COPYING.LIB; - * if not, write to the Free Software Foundation, Inc., - * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA - */ - -#include "pthread.h" -#include "implement.h" - - -int -pthread_barrier_init(pthread_barrier_t * barrier, - const pthread_barrierattr_t * attr, - unsigned int count) -{ - pthread_barrier_t b; - - if (barrier == NULL || count == 0) - { - return EINVAL; - } - - if (NULL != (b = (pthread_barrier_t) calloc(1, sizeof(*b)))) - { - b->pshared = (attr != NULL && *attr != NULL - ? (*attr)->pshared - : PTHREAD_PROCESS_PRIVATE); - - b->nCurrentBarrierHeight = b->nInitialBarrierHeight = count; - b->iStep = 0; - - /* - * Two semaphores are used in the same way as two stepping - * stones might be used in crossing a stream. Once all - * threads are safely on one stone, the other stone can - * be moved ahead, and the threads can start moving to it. - * If some threads decide to eat their lunch before moving - * then the other threads have to wait. - */ - if (0 == sem_init(&(b->semBarrierBreeched[0]), b->pshared, 0)) - { - if (0 == sem_init(&(b->semBarrierBreeched[1]), b->pshared, 0)) - { - *barrier = b; - return 0; - } - (void) sem_destroy(&(b->semBarrierBreeched[0])); - } - (void) free(b); - } - - return ENOMEM; -} - |