1 files changed, 80 insertions, 0 deletions
diff --git a/lib/libthr/thread/thr_setschedparam.c b/lib/libthr/thread/thr_setschedparam.c
new file mode 100644
index 0000000000000..cf2c1f919e124
--- /dev/null
+++ b/lib/libthr/thread/thr_setschedparam.c
@@ -0,0 +1,80 @@
+/*-
+ * SPDX-License-Identifier: BSD-4-Clause
+ *
+ * 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include "namespace.h"
+#include <sys/param.h>
+#include <errno.h>
+#include <pthread.h>
+#include "un-namespace.h"
+
+#include "thr_private.h"
+
+__weak_reference(_pthread_setschedparam, pthread_setschedparam);
+
+/*
+ * Set a thread's scheduling parameters, this should be done
+ * in kernel, doing it in userland is no-op.
+ */
+int
+_pthread_setschedparam(pthread_t pthread, int policy, 
+	const struct sched_param *param)
+{
+	struct pthread	*curthread = _get_curthread();
+	int	ret;
+
+	if (pthread == curthread)
+		THR_LOCK(curthread);
+	else if ((ret = _thr_find_thread(curthread, pthread,
+		 /*include dead*/0)) != 0)
+		return (ret);
+	if (pthread->attr.sched_policy == policy &&
+	    (policy == SCHED_OTHER ||
+	     pthread->attr.prio == param->sched_priority)) {
+		pthread->attr.prio = param->sched_priority;
+		THR_THREAD_UNLOCK(curthread, pthread);
+		return (0);
+	}
+	ret = _thr_setscheduler(pthread->tid, policy, param);
+	if (ret == -1)
+		ret = errno;
+	else {
+		pthread->attr.sched_policy = policy;
+		pthread->attr.prio = param->sched_priority;
+	}
+	THR_THREAD_UNLOCK(curthread, pthread);
+	return (ret);
+}