From 2ab3d99967d68c79351fe2a3df22c445447e3010 Mon Sep 17 00:00:00 2001
From: Michał Cichoń <michcic@gmail.com>
Date: Tue, 15 Nov 2011 22:28:48 +0100
Subject: Initial import.

---
 pthreads/src/pthread_rwlock_init.c | 109 +++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 pthreads/src/pthread_rwlock_init.c

(limited to 'pthreads/src/pthread_rwlock_init.c')

diff --git a/pthreads/src/pthread_rwlock_init.c b/pthreads/src/pthread_rwlock_init.c
new file mode 100644
index 0000000..597c1ff
--- /dev/null
+++ b/pthreads/src/pthread_rwlock_init.c
@@ -0,0 +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 <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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