From 4690e8b0159c8972521618c7f2f0f56fb9aa3725 Mon Sep 17 00:00:00 2001
From: Erik van der Kouwe <erik@minix3.org>
Date: Thu, 1 Jul 2010 08:38:15 +0000
Subject: [PATCH] Opps, forgot to svn add these files

---
 include/minix/sched.h    | 14 +++++++
 lib/libsys/sched_start.c | 81 ++++++++++++++++++++++++++++++++++++++++
 lib/libsys/sched_stop.c  | 27 ++++++++++++++
 3 files changed, 122 insertions(+)
 create mode 100644 include/minix/sched.h
 create mode 100644 lib/libsys/sched_start.c
 create mode 100644 lib/libsys/sched_stop.c

diff --git a/include/minix/sched.h b/include/minix/sched.h
new file mode 100644
index 000000000..6134f8a0c
--- /dev/null
+++ b/include/minix/sched.h
@@ -0,0 +1,14 @@
+#ifndef _MINIX_SCHED_H
+#define _MINIX_SCHED_H
+
+#include <minix/ipc.h>
+
+_PROTOTYPE(int sched_stop, (endpoint_t scheduler_e, endpoint_t schedulee_e));
+_PROTOTYPE(int sched_start, (endpoint_t scheduler_e, endpoint_t schedulee_e, 
+	endpoint_t parent_e, unsigned maxprio, unsigned quantum,
+	endpoint_t *newscheduler_e));
+_PROTOTYPE(int sched_inherit, (endpoint_t scheduler_e, 
+	endpoint_t schedulee_e, endpoint_t parent_e, unsigned maxprio, 
+	endpoint_t *newscheduler_e));
+
+#endif /* _MINIX_SCHED_H */
diff --git a/lib/libsys/sched_start.c b/lib/libsys/sched_start.c
new file mode 100644
index 000000000..a617d350a
--- /dev/null
+++ b/lib/libsys/sched_start.c
@@ -0,0 +1,81 @@
+#include "syslib.h"
+#include <assert.h>
+#include <machine/archtypes.h>
+#include <timers.h>
+
+#include "kernel/config.h"
+#include "kernel/const.h"
+#include "kernel/type.h"
+#include "kernel/proc.h"
+
+/*===========================================================================*
+ *				sched_inherit				     *
+ *===========================================================================*/
+PUBLIC int sched_inherit(endpoint_t scheduler_e, 
+	endpoint_t schedulee_e, endpoint_t parent_e, unsigned maxprio, 
+	endpoint_t *newscheduler_e)
+{
+	int rv;
+	message m;
+
+	assert(_ENDPOINT_P(scheduler_e) >= 0);
+	assert(_ENDPOINT_P(schedulee_e) >= 0);
+	assert(_ENDPOINT_P(parent_e) >= 0);
+	assert(maxprio >= 0);
+	assert(maxprio < NR_SCHED_QUEUES);
+	assert(newscheduler_e);
+	
+	m.SCHEDULING_ENDPOINT	= schedulee_e;
+	m.SCHEDULING_PARENT	= parent_e;
+	m.SCHEDULING_MAXPRIO	= (int) maxprio;
+
+	/* Send the request to the scheduler */
+	if ((rv = _taskcall(scheduler_e, SCHEDULING_INHERIT, &m))) {
+		return rv;
+	}
+
+	/* Store the process' scheduler. Note that this might not be the
+	 * scheduler we sent the SCHEDULING_INHERIT message to. That scheduler
+	 * might have forwarded the scheduling message on to another scheduler
+	 * before returning the message.
+	 */
+	*newscheduler_e = m.SCHEDULING_SCHEDULER;
+	return (OK);
+}
+
+/*===========================================================================*
+ *				sched_start				     *
+ *===========================================================================*/
+PUBLIC int sched_start(endpoint_t scheduler_e, endpoint_t schedulee_e, 
+	endpoint_t parent_e, unsigned maxprio, unsigned quantum,
+	endpoint_t *newscheduler_e)
+{
+	int rv;
+	message m;
+
+	assert(_ENDPOINT_P(scheduler_e) >= 0);
+	assert(_ENDPOINT_P(schedulee_e) >= 0);
+	assert(_ENDPOINT_P(parent_e) >= 0);
+	assert(maxprio >= 0);
+	assert(maxprio < NR_SCHED_QUEUES);
+	assert(quantum > 0);
+	assert(newscheduler_e);
+	
+	m.SCHEDULING_ENDPOINT	= schedulee_e;
+	m.SCHEDULING_PARENT	= parent_e;
+	m.SCHEDULING_MAXPRIO	= (int) maxprio;
+	m.SCHEDULING_QUANTUM	= (int) quantum;
+
+	/* Send the request to the scheduler */
+	if ((rv = _taskcall(scheduler_e, SCHEDULING_START, &m))) {
+		return rv;
+	}
+
+	/* Store the process' scheduler. Note that this might not be the
+	 * scheduler we sent the SCHEDULING_START message to. That scheduler
+	 * might have forwarded the scheduling message on to another scheduler
+	 * before returning the message.
+	 */
+	*newscheduler_e = m.SCHEDULING_SCHEDULER;
+	return (OK);
+}
diff --git a/lib/libsys/sched_stop.c b/lib/libsys/sched_stop.c
new file mode 100644
index 000000000..d31b28dff
--- /dev/null
+++ b/lib/libsys/sched_stop.c
@@ -0,0 +1,27 @@
+#include "syslib.h"
+#include <assert.h>
+
+/*===========================================================================*
+ *				sched_stop				     *
+ *===========================================================================*/
+PUBLIC int sched_stop(endpoint_t scheduler_e, endpoint_t schedulee_e)
+{
+	int rv;
+	message m;
+	
+	/* If the kernel is the scheduler, it will implicitly stop scheduling
+	 * once another process takes over or the process terminates */
+	if (scheduler_e == KERNEL || scheduler_e == NONE)
+		return(OK);
+
+	/* User-scheduled, perform the call */
+	assert(_ENDPOINT_P(scheduler_e) >= 0);
+	assert(_ENDPOINT_P(schedulee_e) >= 0);
+
+	m.SCHEDULING_ENDPOINT	= schedulee_e;
+	if ((rv = _taskcall(scheduler_e, SCHEDULING_STOP, &m))) {
+		return rv;
+	}
+
+	return (OK);
+}
-- 
2.44.0