Merge tag 'upstream/libpthread/20090404' into upstream-merged

1 files changed, 59 insertions, 0 deletions

diff --git a/libpthread/sysdeps/generic/pt-mutex-transfer-np.c b/libpthread/sysdeps/generic/pt-mutex-transfer-np.c
new file mode 100644
index 00000000..7796ac4f
--- /dev/null
+++ b/libpthread/sysdeps/generic/pt-mutex-transfer-np.c
@@ -0,0 +1,59 @@
+/* Transfer ownership of a mutex.  Generic version.
+   Copyright (C) 2008 Free Software Foundation, Inc.
+   Written by Neal H. Walfield <neal@gnu.org>.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd 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 3 of
+   the License, or (at your option) any later version.
+
+   The GNU Hurd 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 program.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <pthread.h>
+#include <assert.h>
+
+#include <pt-internal.h>
+
+int
+__pthread_mutex_transfer_np (struct __pthread_mutex *mutex, pthread_t tid)
+{
+  assert (mutex->owner == _pthread_self ());
+
+  struct __pthread *thread = __pthread_getid (tid);
+  if (! thread)
+    return ESRCH;
+
+  if (thread == _pthread_self ())
+    return 0;
+
+  if (mutex->attr && mutex->attr->mutex_type == PTHREAD_MUTEX_ERRORCHECK)
+    {
+
+      if (mutex->owner != _pthread_self ())
+	return EPERM;
+
+      mutex->owner = thread;
+    }
+
+#ifndef NDEBUG
+# if !defined(ALWAYS_TRACK_MUTEX_OWNER)
+  if (mutex->attr && mutex->attr->mutex_type != PTHREAD_MUTEX_NORMAL)
+# endif
+    {
+      mutex->owner = thread;
+    }
+#endif
+
+  return 0;
+}
+
+strong_alias (__pthread_mutex_transfer_np, pthread_mutex_transfer_np)