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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __CUTILS_SCHED_POLICY_H
#define __CUTILS_SCHED_POLICY_H
#ifdef __cplusplus
extern "C" {
#endif
/* Keep in sync with THREAD_GROUP_* in frameworks/base/core/java/android/os/Process.java */
typedef enum {
SP_DEFAULT = -1,
SP_BACKGROUND = 0,
SP_FOREGROUND = 1,
SP_SYSTEM = 2, // can't be used with set_sched_policy()
SP_AUDIO_APP = 3,
SP_AUDIO_SYS = 4,
SP_CNT,
SP_MAX = SP_CNT - 1,
SP_SYSTEM_DEFAULT = SP_FOREGROUND,
} SchedPolicy;
/* Assign thread tid to the cgroup associated with the specified policy.
* If the thread is a thread group leader, that is it's gettid() == getpid(),
* then the other threads in the same thread group are _not_ affected.
* On platforms which support gettid(), zero tid means current thread.
* Return value: 0 for success, or -errno for error.
*/
extern int set_sched_policy(int tid, SchedPolicy policy);
/* Return the policy associated with the cgroup of thread tid via policy pointer.
* On platforms which support gettid(), zero tid means current thread.
* Return value: 0 for success, or -1 for error and set errno.
*/
extern int get_sched_policy(int tid, SchedPolicy *policy);
/* Return a displayable string corresponding to policy.
* Return value: non-NULL NUL-terminated name of unspecified length;
* the caller is responsible for displaying the useful part of the string.
*/
extern const char *get_sched_policy_name(SchedPolicy policy);
#ifdef __cplusplus
}
#endif
#endif /* __CUTILS_SCHED_POLICY_H */
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