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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
commit3562e78743202e43aec8727005182a2558117eca (patch)
tree8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /pthreads/pthread_rwlock_init.c
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Diffstat (limited to 'pthreads/pthread_rwlock_init.c')
-rw-r--r--pthreads/pthread_rwlock_init.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/pthreads/pthread_rwlock_init.c b/pthreads/pthread_rwlock_init.c
new file mode 100644
index 000000000..3e3f448c0
--- /dev/null
+++ b/pthreads/pthread_rwlock_init.c
@@ -0,0 +1,110 @@
+/*
+ * 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;
+}