- Add libthr but don't hook it up to the regular build yet. This is an

   adaptation of libc_r for the thr system call interface.  This is beta
   quality code.

1 files changed, 115 insertions, 0 deletions

diff --git a/lib/libthr/thread/thr_setschedparam.c b/lib/libthr/thread/thr_setschedparam.c
new file mode 100644
index 0000000..f9551e0
--- /dev/null
+++ b/lib/libthr/thread/thr_setschedparam.c
@@ -0,0 +1,115 @@
+/*
+ * 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 <errno.h>
+#include <sys/param.h>
+#include <pthread.h>
+#include "thr_private.h"
+
+__weak_reference(_pthread_setschedparam, pthread_setschedparam);
+
+int
+_pthread_setschedparam(pthread_t pthread, int policy, 
+	const struct sched_param *param)
+{
+#if 0	/* XXXTHR */
+	int old_prio, in_readyq = 0, ret = 0;
+#endif
+
+	if ((param == NULL) || (policy < SCHED_FIFO) || (policy > SCHED_RR))
+		return (EINVAL);
+
+	if ((param->sched_priority < PTHREAD_MIN_PRIORITY) ||
+	    (param->sched_priority > PTHREAD_MAX_PRIORITY))
+		return (ENOTSUP);
+
+	return (0);
+#if 0	/* XXXTHR */
+	/* Find the thread in the list of active threads: */
+	if ((ret = _find_thread(pthread)) == 0) {
+		GIANT_LOCK();
+
+		if (param->sched_priority !=
+		    PTHREAD_BASE_PRIORITY(pthread->base_priority)) {
+			/*
+			 * Remove the thread from its current priority
+			 * queue before any adjustments are made to its
+			 * active priority:
+			 */
+			old_prio = pthread->active_priority;
+			if ((pthread->flags & PTHREAD_FLAGS_IN_PRIOQ) != 0) {
+				in_readyq = 1;
+				PTHREAD_PRIOQ_REMOVE(pthread);
+			}
+
+			/* Set the thread base priority: */
+			pthread->base_priority &=
+			    (PTHREAD_SIGNAL_PRIORITY | PTHREAD_RT_PRIORITY);
+			pthread->base_priority = param->sched_priority;
+
+			/* Recalculate the active priority: */
+			pthread->active_priority = MAX(pthread->base_priority,
+			    pthread->inherited_priority);
+
+			if (in_readyq) {
+				if ((pthread->priority_mutex_count > 0) &&
+				    (old_prio > pthread->active_priority)) {
+					/*
+					 * POSIX states that if the priority is
+					 * being lowered, the thread must be
+					 * inserted at the head of the queue for
+					 * its priority if it owns any priority
+					 * protection or inheritence mutexes.
+					 */
+					PTHREAD_PRIOQ_INSERT_HEAD(pthread);
+				}
+				else
+					PTHREAD_PRIOQ_INSERT_TAIL(pthread);
+			}
+
+			/*
+			 * Check for any mutex priority adjustments.  This
+			 * includes checking for a priority mutex on which
+			 * this thread is waiting.
+			 */
+			_mutex_notify_priochange(pthread);
+		}
+
+		/* Set the scheduling policy: */
+		pthread->attr.sched_policy = policy;
+
+		GIANT_UNLOCK();
+	}
+	return(ret);
+#endif
+}