X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/378393581903b274cb7a4d18e0d978071a6b592d..6d2010ae8f7a6078e10b361c6962983bab233e0f:/osfmk/kern/mk_sp.c

diff --git a/osfmk/kern/mk_sp.c b/osfmk/kern/mk_sp.c
index 565681e39..d8e86124b 100644
--- a/osfmk/kern/mk_sp.c
+++ b/osfmk/kern/mk_sp.c
@@ -1,23 +1,29 @@
 /*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
@@ -70,33 +76,40 @@ thread_policy_common(
 			invalid_policy(policy)		)
 		return(KERN_INVALID_ARGUMENT);
 
+	if (thread->static_param)
+		return (KERN_SUCCESS);
+
+	if ((policy == POLICY_TIMESHARE)
+		&& !SCHED(supports_timeshare_mode)())
+		policy = TH_MODE_FIXED;
+
 	s = splsched();
 	thread_lock(thread);
 
-	if (	!(thread->sched_mode & TH_MODE_REALTIME)	&&
-			!(thread->safe_mode & TH_MODE_REALTIME)			) {
-		if (!(thread->sched_mode & TH_MODE_FAILSAFE)) {
-			integer_t	oldmode = (thread->sched_mode & TH_MODE_TIMESHARE);
+	if (	(thread->sched_mode != TH_MODE_REALTIME)	&&
+			(thread->saved_mode != TH_MODE_REALTIME)		) {
+		if (!(thread->sched_flags & TH_SFLAG_DEMOTED_MASK)) {
+			boolean_t	oldmode = thread->sched_mode == TH_MODE_TIMESHARE;
 
 			if (policy == POLICY_TIMESHARE && !oldmode) {
-				thread->sched_mode |= TH_MODE_TIMESHARE;
+				thread->sched_mode = TH_MODE_TIMESHARE;
 
-				if (thread->state & TH_RUN)
-					pset_share_incr(thread->processor_set);
+				if ((thread->state & (TH_RUN|TH_IDLE)) == TH_RUN)
+					sched_share_incr();
 			}
 			else
 			if (policy != POLICY_TIMESHARE && oldmode) {
-				thread->sched_mode &= ~TH_MODE_TIMESHARE;
+				thread->sched_mode = TH_MODE_FIXED;
 
-				if (thread->state & TH_RUN)
-					pset_share_decr(thread->processor_set);
+				if ((thread->state & (TH_RUN|TH_IDLE)) == TH_RUN)
+					sched_share_decr();
 			}
 		}
 		else {
 			if (policy == POLICY_TIMESHARE)
-				thread->safe_mode |= TH_MODE_TIMESHARE;
+				thread->saved_mode = TH_MODE_TIMESHARE;
 			else
-				thread->safe_mode &= ~TH_MODE_TIMESHARE;
+				thread->saved_mode = TH_MODE_FIXED;
 		}
 
 		if (priority >= thread->max_priority)
@@ -120,6 +133,12 @@ thread_policy_common(
 
 		thread->importance = priority - thread->task_priority;
 
+#if CONFIG_EMBEDDED
+		/* No one can have a base priority less than MAXPRI_THROTTLE */
+		if (priority < MAXPRI_THROTTLE) 
+			priority = MAXPRI_THROTTLE;
+#endif /* CONFIG_EMBEDDED */
+
 		set_priority(thread, priority);
 	}
 
@@ -150,17 +169,11 @@ thread_set_policy(
 	kern_return_t			result = KERN_SUCCESS;
 
 	if (	thread == THREAD_NULL			||
-			pset == PROCESSOR_SET_NULL		)
+			pset == PROCESSOR_SET_NULL || pset != &pset0)
 		return (KERN_INVALID_ARGUMENT);
 
 	thread_mtx_lock(thread);
 
-	if (pset != thread->processor_set) {
-		thread_mtx_unlock(thread);
-
-		return (KERN_FAILURE);
-	}
-
 	switch (policy) {
 
 	case POLICY_RR:
@@ -261,9 +274,9 @@ thread_policy(
 	boolean_t				set_limit)
 {
 	kern_return_t			result = KERN_SUCCESS;
-	processor_set_t			pset;
-	policy_limit_t			limit;
-	int						limcount;
+	processor_set_t			pset = &pset0;
+	policy_limit_t			limit = NULL;
+	int						limcount = 0;
 	policy_rr_limit_data_t			rr_limit;
 	policy_fifo_limit_data_t		fifo_limit;
 	policy_timeshare_limit_data_t	ts_limit;
@@ -273,13 +286,6 @@ thread_policy(
 
 	thread_mtx_lock(thread);
 
-	pset = thread->processor_set;
-	if (pset == PROCESSOR_SET_NULL) {
-		thread_mtx_unlock(thread);
-
-		return (KERN_INVALID_ARGUMENT);
-	}
-
 	if (	invalid_policy(policy)											||
 			((POLICY_TIMESHARE | POLICY_RR | POLICY_FIFO) & policy) == 0	) {
 		thread_mtx_unlock(thread);