Add pthread_mutex_{get,set}prioceiling()

1 files changed, 55 insertions, 0 deletions

diff --git a/lib/librthread/rthread_mutex_prio.c b/lib/librthread/rthread_mutex_prio.c
new file mode 100644
index 00000000000..5dca967e33f
--- /dev/null
+++ b/lib/librthread/rthread_mutex_prio.c
@@ -0,0 +1,55 @@
+/*	$OpenBSD: rthread_mutex_prio.c,v 1.1 2011/12/22 00:42:07 guenther Exp $ */
+/*
+ * Copyright (c) 2011 Philip Guenther <guenther@openbsd.org>
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+
+#include <errno.h>
+
+#include <pthread.h>
+#include "rthread.h"
+
+int
+pthread_mutex_getprioceiling(pthread_mutex_t *mutexp, int *prioceiling)
+{
+	pthread_mutex_t mutex = *mutexp;
+
+	if (mutex->prioceiling == -1)
+		return (EINVAL);
+	*prioceiling = mutex->prioceiling;
+
+	return (0);
+}
+
+int
+pthread_mutex_setprioceiling(pthread_mutex_t *mutexp, int prioceiling,
+    int *old_ceiling)
+{
+	pthread_mutex_t mutex = *mutexp;
+	int ret;
+
+	if (mutex->prioceiling == -1 ||
+	    prioceiling < PTHREAD_MIN_PRIORITY ||
+	    prioceiling > PTHREAD_MAX_PRIORITY) {
+		ret = EINVAL;
+	} else if ((ret = pthread_mutex_lock(mutexp)) == 0) {
+		*old_ceiling = mutex->prioceiling;
+		mutex->prioceiling = prioceiling;
+		pthread_mutex_unlock(mutexp);
+	}
+
+	return (ret);
+}