/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2004 Apple Computer, 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@
- */
-/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * HISTORY
- *
- * 15 October 2000 (debo)
- * Created.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#include <mach/mach_types.h>
+#include <mach/task_server.h>
+
+#include <kern/sched.h>
+#include <kern/task.h>
+
+static void
+task_priority(
+ task_t task,
+ integer_t priority,
+ integer_t max_priority);
kern_return_t
task_policy_set(
task_policy_t policy_info,
mach_msg_type_number_t count)
{
- if (task == TASK_NULL)
+ kern_return_t result = KERN_SUCCESS;
+
+ if (task == TASK_NULL || task == kernel_task)
return (KERN_INVALID_ARGUMENT);
switch (flavor) {
if (count < TASK_CATEGORY_POLICY_COUNT)
return (KERN_INVALID_ARGUMENT);
- switch (info->role) {
-
- case TASK_UNSPECIFIED:
- case TASK_FOREGROUND_APPLICATION:
- case TASK_BACKGROUND_APPLICATION:
- case TASK_CONTROL_APPLICATION:
- case TASK_GRAPHICS_SERVER:
- return (KERN_SUCCESS);
-
- default:
- return (KERN_INVALID_ARGUMENT);
+ task_lock(task);
+
+ if ( info->role == TASK_FOREGROUND_APPLICATION ||
+ info->role == TASK_BACKGROUND_APPLICATION ) {
+ switch (task->role) {
+
+ case TASK_FOREGROUND_APPLICATION:
+ case TASK_BACKGROUND_APPLICATION:
+ case TASK_UNSPECIFIED:
+ task_priority(task,
+ ((info->role == TASK_FOREGROUND_APPLICATION)?
+ BASEPRI_FOREGROUND: BASEPRI_BACKGROUND),
+ task->max_priority);
+ task->role = info->role;
+ break;
+
+ case TASK_CONTROL_APPLICATION:
+ case TASK_RENICED:
+ /* fail silently */
+ break;
+
+ default:
+ result = KERN_INVALID_ARGUMENT;
+ break;
+ }
}
+ else
+ if (info->role == TASK_CONTROL_APPLICATION) {
+ if ( task != current_task() ||
+ task->sec_token.val[0] != 0 )
+ result = KERN_INVALID_ARGUMENT;
+ else {
+ task_priority(task, BASEPRI_CONTROL, task->max_priority);
+ task->role = info->role;
+ }
+ }
+ else
+ if (info->role == TASK_GRAPHICS_SERVER) {
+ if ( task != current_task() ||
+ task->sec_token.val[0] != 0 )
+ result = KERN_INVALID_ARGUMENT;
+ else {
+ task_priority(task, MAXPRI_RESERVED - 3, MAXPRI_RESERVED);
+ task->role = info->role;
+ }
+ }
+ else
+ result = KERN_INVALID_ARGUMENT;
+
+ task_unlock(task);
break;
}
default:
+ result = KERN_INVALID_ARGUMENT;
+ break;
+ }
+
+ return (result);
+}
+
+static void
+task_priority(
+ task_t task,
+ integer_t priority,
+ integer_t max_priority)
+{
+ thread_t thread;
+
+ task->max_priority = max_priority;
+
+ if (priority > task->max_priority)
+ priority = task->max_priority;
+ else
+ if (priority < MINPRI)
+ priority = MINPRI;
+
+ task->priority = priority;
+
+ queue_iterate(&task->threads, thread, thread_t, task_threads) {
+ thread_mtx_lock(thread);
+
+ if (thread->active)
+ thread_task_priority(thread, priority, max_priority);
+
+ thread_mtx_unlock(thread);
+ }
+}
+
+kern_return_t
+task_importance(
+ task_t task,
+ integer_t importance)
+{
+ if (task == TASK_NULL || task == kernel_task)
+ return (KERN_INVALID_ARGUMENT);
+
+ task_lock(task);
+
+ if (!task->active) {
+ task_unlock(task);
+
+ return (KERN_TERMINATED);
+ }
+
+ if (task->role >= TASK_CONTROL_APPLICATION) {
+ task_unlock(task);
+
return (KERN_INVALID_ARGUMENT);
}
+ task_priority(task, importance + BASEPRI_DEFAULT, task->max_priority);
+ task->role = TASK_RENICED;
+
+ task_unlock(task);
+
return (KERN_SUCCESS);
}
-
+
kern_return_t
task_policy_get(
task_t task,
mach_msg_type_number_t *count,
boolean_t *get_default)
{
- if (task == TASK_NULL)
+ if (task == TASK_NULL || task == kernel_task)
return (KERN_INVALID_ARGUMENT);
switch (flavor) {
if (*count < TASK_CATEGORY_POLICY_COUNT)
return (KERN_INVALID_ARGUMENT);
- info->role = TASK_UNSPECIFIED;
+ if (*get_default)
+ info->role = TASK_UNSPECIFIED;
+ else {
+ task_lock(task);
+ info->role = task->role;
+ task_unlock(task);
+ }
break;
}
projects / apple / xnu.git / blobdiff