diff options
Diffstat (limited to 'pthreads/pthread_rwlock_init.c')
| -rw-r--r-- | pthreads/pthread_rwlock_init.c | 219 |
1 files changed, 109 insertions, 110 deletions
diff --git a/pthreads/pthread_rwlock_init.c b/pthreads/pthread_rwlock_init.c index 3e3f448c0..c1d703d4d 100644 --- a/pthreads/pthread_rwlock_init.c +++ b/pthreads/pthread_rwlock_init.c @@ -1,110 +1,109 @@ -/* - * pthread_rwlock_init.c - * - * Description: - * This translation unit implements read/write lock primitives. - * - * -------------------------------------------------------------------------- - * - * Pthreads-win32 - POSIX Threads Library for Win32 - * Copyright(C) 1998 John E. Bossom - * Copyright(C) 1999,2005 Pthreads-win32 contributors - * - * Contact Email: rpj@callisto.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 <errno.h> -#include <limits.h> - -#include "pthread.h" -#include "implement.h" - -int -pthread_rwlock_init (pthread_rwlock_t * rwlock, - const pthread_rwlockattr_t * attr) -{ - int result; - pthread_rwlock_t rwl = 0; - - if (rwlock == NULL) - { - return EINVAL; - } - - if (attr != NULL && *attr != NULL) - { - result = EINVAL; /* Not supported */ - goto DONE; - } - - rwl = (pthread_rwlock_t) calloc (1, sizeof (*rwl)); - - if (rwl == NULL) - { - result = ENOMEM; - goto DONE; - } - - rwl->nSharedAccessCount = 0; - rwl->nExclusiveAccessCount = 0; - rwl->nCompletedSharedAccessCount = 0; - - result = pthread_mutex_init (&rwl->mtxExclusiveAccess, NULL); - if (result != 0) - { - goto FAIL0; - } - - result = pthread_mutex_init (&rwl->mtxSharedAccessCompleted, NULL); - if (result != 0) - { - goto FAIL1; - } - - result = pthread_cond_init (&rwl->cndSharedAccessCompleted, NULL); - if (result != 0) - { - goto FAIL2; - } - - rwl->nMagic = PTW32_RWLOCK_MAGIC; - - result = 0; - goto DONE; - -FAIL2: - (void) pthread_mutex_destroy (&(rwl->mtxSharedAccessCompleted)); - -FAIL1: - (void) pthread_mutex_destroy (&(rwl->mtxExclusiveAccess)); - -FAIL0: - (void) free (rwl); - rwl = NULL; - -DONE: - *rwlock = rwl; - - return result; -} +/*
+ * pthread_rwlock_init.c
+ *
+ * Description:
+ * This translation unit implements read/write lock primitives.
+ *
+ * --------------------------------------------------------------------------
+ *
+ * Pthreads-win32 - POSIX Threads Library for Win32
+ * Copyright(C) 1998 John E. Bossom
+ * Copyright(C) 1999,2005 Pthreads-win32 contributors
+ *
+ * Contact Email: rpj@callisto.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 <limits.h>
+
+#include "pthread.h"
+#include "implement.h"
+
+int
+pthread_rwlock_init (pthread_rwlock_t * rwlock,
+ const pthread_rwlockattr_t * attr)
+{
+ int result;
+ pthread_rwlock_t rwl = 0;
+
+ if (rwlock == NULL)
+ {
+ return EINVAL;
+ }
+
+ if (attr != NULL && *attr != NULL)
+ {
+ result = EINVAL; /* Not supported */
+ goto DONE;
+ }
+
+ rwl = (pthread_rwlock_t) calloc (1, sizeof (*rwl));
+
+ if (rwl == NULL)
+ {
+ result = ENOMEM;
+ goto DONE;
+ }
+
+ rwl->nSharedAccessCount = 0;
+ rwl->nExclusiveAccessCount = 0;
+ rwl->nCompletedSharedAccessCount = 0;
+
+ result = pthread_mutex_init (&rwl->mtxExclusiveAccess, NULL);
+ if (result != 0)
+ {
+ goto FAIL0;
+ }
+
+ result = pthread_mutex_init (&rwl->mtxSharedAccessCompleted, NULL);
+ if (result != 0)
+ {
+ goto FAIL1;
+ }
+
+ result = pthread_cond_init (&rwl->cndSharedAccessCompleted, NULL);
+ if (result != 0)
+ {
+ goto FAIL2;
+ }
+
+ rwl->nMagic = PTW32_RWLOCK_MAGIC;
+
+ result = 0;
+ goto DONE;
+
+FAIL2:
+ (void) pthread_mutex_destroy (&(rwl->mtxSharedAccessCompleted));
+
+FAIL1:
+ (void) pthread_mutex_destroy (&(rwl->mtxExclusiveAccess));
+
+FAIL0:
+ (void) free (rwl);
+ rwl = NULL;
+
+DONE:
+ *rwlock = rwl;
+
+ return result;
+}
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