1 files changed, 55 insertions, 0 deletions
diff --git a/nptl/pthread_mutex_setprioceiling.c b/nptl/pthread_mutex_setprioceiling.c
new file mode 100644
index 0000000000..999b635ac1
--- /dev/null
+++ b/nptl/pthread_mutex_setprioceiling.c
@@ -0,0 +1,55 @@
+/* Set current priority ceiling of pthread_mutex_t.
+   Copyright (C) 2006 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
+
+   The GNU C 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 2.1 of the License, or (at your option) any later version.
+
+   The GNU C 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 the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <pthreadP.h>
+
+
+int
+pthread_mutex_setprioceiling (mutex, prioceiling, old_ceiling)
+     pthread_mutex_t *mutex;
+     int prioceiling;
+     int *old_ceiling;
+{
+  /* The low bits of __kind aren't ever changed after pthread_mutex_init,
+     so we don't need a lock yet.  */
+  if ((mutex->__data.__kind & PTHREAD_MUTEX_PRIO_PROTECT_PRIVATE_NP) == 0)
+    return EINVAL;
+
+  if (prioceiling < 0 || __builtin_expect (prioceiling > 255, 0))
+    return EINVAL;
+
+  /* XXX This needs to lock with TID, but shouldn't obey priority protect
+     protocol.  */
+  /* lll_xxx_mutex_lock (mutex->__data.__lock); */
+
+  if (old_ceiling != NULL)
+    *old_ceiling = (mutex->__data.__kind & PTHREAD_MUTEX_PRIO_CEILING_MASK)
+		   >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT;
+
+  int newkind = (mutex->__data.__kind & ~PTHREAD_MUTEX_PRIO_CEILING_MASK);
+  mutex->__data.__kind = newkind
+			 | (prioceiling << PTHREAD_MUTEX_PRIO_CEILING_SHIFT);
+
+  /* XXX This needs to unlock the above special kind of lock.  */
+  /* lll_xxx_mutex_unlock (mutex->__data.__lock); */
+
+  return 0;
+}