1 files changed, 116 insertions, 0 deletions
diff --git a/lib/libthr/thread/thr_mutex_prioceiling.c b/lib/libthr/thread/thr_mutex_prioceiling.c
new file mode 100644
index 0000000..edea124
--- /dev/null
+++ b/lib/libthr/thread/thr_mutex_prioceiling.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 1998 Daniel Eischen <eischen@vigrid.com>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Daniel Eischen.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY DANIEL EISCHEN AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <pthread.h>
+#include "thr_private.h"
+
+__weak_reference(_pthread_mutexattr_getprioceiling, pthread_mutexattr_getprioceiling);
+__weak_reference(_pthread_mutexattr_setprioceiling, pthread_mutexattr_setprioceiling);
+__weak_reference(_pthread_mutex_getprioceiling, pthread_mutex_getprioceiling);
+__weak_reference(_pthread_mutex_setprioceiling, pthread_mutex_setprioceiling);
+
+int
+_pthread_mutexattr_getprioceiling(pthread_mutexattr_t *mattr, int *prioceiling)
+{
+	int ret = 0;
+
+	if ((mattr == NULL) || (*mattr == NULL))
+		ret = EINVAL;
+	else if ((*mattr)->m_protocol != PTHREAD_PRIO_PROTECT)
+		ret = EINVAL;
+	else
+		*prioceiling = (*mattr)->m_ceiling;
+
+	return(ret);
+}
+
+int
+_pthread_mutexattr_setprioceiling(pthread_mutexattr_t *mattr, int prioceiling)
+{
+	int ret = 0;
+
+	if ((mattr == NULL) || (*mattr == NULL))
+		ret = EINVAL;
+	else if ((*mattr)->m_protocol != PTHREAD_PRIO_PROTECT)
+		ret = EINVAL;
+	else
+		(*mattr)->m_ceiling = prioceiling;
+
+	return(ret);
+}
+
+int
+_pthread_mutex_getprioceiling(pthread_mutex_t *mutex,
+			      int *prioceiling)
+{
+	int ret;
+
+	if ((mutex == NULL) || (*mutex == NULL))
+		ret = EINVAL;
+	else if ((*mutex)->m_protocol != PTHREAD_PRIO_PROTECT)
+		ret = EINVAL;
+	else
+		ret = (*mutex)->m_prio;
+
+	return(ret);
+}
+
+int
+_pthread_mutex_setprioceiling(pthread_mutex_t *mutex,
+			      int prioceiling, int *old_ceiling)
+{
+	int ret = 0;
+	int tmp;
+
+	if ((mutex == NULL) || (*mutex == NULL))
+		ret = EINVAL;
+	else if ((*mutex)->m_protocol != PTHREAD_PRIO_PROTECT)
+		ret = EINVAL;
+	/* Lock the mutex: */
+	else if ((ret = pthread_mutex_lock(mutex)) == 0) {
+		tmp = (*mutex)->m_prio;
+		/* Set the new ceiling: */
+		(*mutex)->m_prio = prioceiling;
+
+		/* Unlock the mutex: */
+		ret = pthread_mutex_unlock(mutex);
+
+		/* Return the old ceiling: */
+		*old_ceiling = tmp;
+	}
+	return(ret);
+}