Major reorganisation of source code; new routine and tests added.

1 files changed, 109 insertions, 0 deletions

diff --git a/pthread_rwlock_init.c b/pthread_rwlock_init.c
new file mode 100644
index 0000000..6affbce
--- /dev/null
+++ b/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) 1999,2002 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 <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;
+}