cvs update pthreads

1 files changed, 122 insertions, 123 deletions

diff --git a/pthreads/pthread_rwlock_trywrlock.c b/pthreads/pthread_rwlock_trywrlock.c
index 8ba8b5dad..3c6fccaa1 100644
--- a/pthreads/pthread_rwlock_trywrlock.c
+++ b/pthreads/pthread_rwlock_trywrlock.c
@@ -1,123 +1,122 @@
-/*
- * pthread_rwlock_trywrlock.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_trywrlock (pthread_rwlock_t * rwlock)
-{
-  int result, result1;
-  pthread_rwlock_t rwl;
-
-  if (rwlock == NULL || *rwlock == NULL)
-    {
-      return EINVAL;
-    }
-
-  /*
-   * We do a quick check to see if we need to do more work
-   * to initialise a static rwlock. We check
-   * again inside the guarded section of ptw32_rwlock_check_need_init()
-   * to avoid race conditions.
-   */
-  if (*rwlock == PTHREAD_RWLOCK_INITIALIZER)
-    {
-      result = ptw32_rwlock_check_need_init (rwlock);
-
-      if (result != 0 && result != EBUSY)
-	{
-	  return result;
-	}
-    }
-
-  rwl = *rwlock;
-
-  if (rwl->nMagic != PTW32_RWLOCK_MAGIC)
-    {
-      return EINVAL;
-    }
-
-  if ((result = pthread_mutex_trylock (&(rwl->mtxExclusiveAccess))) != 0)
-    {
-      return result;
-    }
-
-  if ((result =
-       pthread_mutex_trylock (&(rwl->mtxSharedAccessCompleted))) != 0)
-    {
-      result1 = pthread_mutex_unlock (&(rwl->mtxExclusiveAccess));
-      return ((result1 != 0) ? result1 : result);
-    }
-
-  if (rwl->nExclusiveAccessCount == 0)
-    {
-      if (rwl->nCompletedSharedAccessCount > 0)
-	{
-	  rwl->nSharedAccessCount -= rwl->nCompletedSharedAccessCount;
-	  rwl->nCompletedSharedAccessCount = 0;
-	}
-
-      if (rwl->nSharedAccessCount > 0)
-	{
-	  if ((result =
-	       pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted))) != 0)
-	    {
-	      (void) pthread_mutex_unlock (&(rwl->mtxExclusiveAccess));
-	      return result;
-	    }
-
-	  if ((result =
-	       pthread_mutex_unlock (&(rwl->mtxExclusiveAccess))) == 0)
-	    {
-	      result = EBUSY;
-	    }
-	}
-      else
-	{
-	  rwl->nExclusiveAccessCount = 1;
-	}
-    }
-  else
-    {
-      result = EBUSY;
-    }
-
-  return result;
-}
+/*

+ * pthread_rwlock_trywrlock.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_trywrlock (pthread_rwlock_t * rwlock)

+{

+  int result, result1;

+  pthread_rwlock_t rwl;

+

+  if (rwlock == NULL || *rwlock == NULL)

+    {

+      return EINVAL;

+    }

+

+  /*

+   * We do a quick check to see if we need to do more work

+   * to initialise a static rwlock. We check

+   * again inside the guarded section of ptw32_rwlock_check_need_init()

+   * to avoid race conditions.

+   */

+  if (*rwlock == PTHREAD_RWLOCK_INITIALIZER)

+    {

+      result = ptw32_rwlock_check_need_init (rwlock);

+

+      if (result != 0 && result != EBUSY)

+	{

+	  return result;

+	}

+    }

+

+  rwl = *rwlock;

+

+  if (rwl->nMagic != PTW32_RWLOCK_MAGIC)

+    {

+      return EINVAL;

+    }

+

+  if ((result = pthread_mutex_trylock (&(rwl->mtxExclusiveAccess))) != 0)

+    {

+      return result;

+    }

+

+  if ((result =

+       pthread_mutex_trylock (&(rwl->mtxSharedAccessCompleted))) != 0)

+    {

+      result1 = pthread_mutex_unlock (&(rwl->mtxExclusiveAccess));

+      return ((result1 != 0) ? result1 : result);

+    }

+

+  if (rwl->nExclusiveAccessCount == 0)

+    {

+      if (rwl->nCompletedSharedAccessCount > 0)

+	{

+	  rwl->nSharedAccessCount -= rwl->nCompletedSharedAccessCount;

+	  rwl->nCompletedSharedAccessCount = 0;

+	}

+

+      if (rwl->nSharedAccessCount > 0)

+	{

+	  if ((result =

+	       pthread_mutex_unlock (&(rwl->mtxSharedAccessCompleted))) != 0)

+	    {

+	      (void) pthread_mutex_unlock (&(rwl->mtxExclusiveAccess));

+	      return result;

+	    }

+

+	  if ((result =

+	       pthread_mutex_unlock (&(rwl->mtxExclusiveAccess))) == 0)

+	    {

+	      result = EBUSY;

+	    }

+	}

+      else

+	{

+	  rwl->nExclusiveAccessCount = 1;

+	}

+    }

+  else

+    {

+      result = EBUSY;

+    }

+

+  return result;

+}