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authorUlrich Drepper <drepper@redhat.com>2004-11-24 22:52:48 +0000
committerUlrich Drepper <drepper@redhat.com>2004-11-24 22:52:48 +0000
commit09594e7ad11ce42ae8ae0b35055ae0b4ec1c3eba (patch)
treedb95826ebd16fa3b28c6b03a289dbd7c8612a8fc
parent6f50c607232b05e5bc2b0e91708302413d222e42 (diff)
Implementation of pthread_setschedprio.
-rw-r--r--nptl/pthread_setschedprio.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/nptl/pthread_setschedprio.c b/nptl/pthread_setschedprio.c
new file mode 100644
index 0000000000..063f5232f5
--- /dev/null
+++ b/nptl/pthread_setschedprio.c
@@ -0,0 +1,66 @@
+/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ 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 <sched.h>
+#include <string.h>
+#include <sched.h>
+#include "pthreadP.h"
+#include <lowlevellock.h>
+
+
+int
+pthread_setschedprio (threadid, prio)
+ pthread_t threadid;
+ int prio;
+{
+ struct pthread *pd = (struct pthread *) threadid;
+
+ /* Make sure the descriptor is valid. */
+ if (INVALID_TD_P (pd))
+ /* Not a valid thread handle. */
+ return ESRCH;
+
+ int result = 0;
+ struct sched_param param;
+ param.sched_priority = prio;
+
+ /* We have to handle cancellation in the following code since we are
+ locking another threads desriptor. */
+ pthread_cleanup_push ((void (*) (void *)) lll_unlock_wake_cb, &pd->lock);
+
+ lll_lock (pd->lock);
+
+ /* Try to set the scheduler information. */
+ if (__builtin_expect (sched_setparam (pd->tid, &param) == -1, 0))
+ result = errno;
+ else
+ {
+ /* We succeeded changing the kernel information. Reflect this
+ change in the thread descriptor. */
+ memcpy (&pd->schedparam, &param, sizeof (struct sched_param));
+ pd->flags |= ATTR_FLAG_SCHED_SET;
+ }
+
+ lll_unlock (pd->lock);
+
+ pthread_cleanup_pop (0);
+
+ return result;
+}