2
* Copyright (C) 2013 The Android Open Source Project
4
* Licensed under the Apache License, Version 2.0 (the "License");
5
* you may not use this file except in compliance with the License.
6
* You may obtain a copy of the License at
8
* http://www.apache.org/licenses/LICENSE-2.0
10
* Unless required by applicable law or agreed to in writing, software
11
* distributed under the License is distributed on an "AS IS" BASIS,
12
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13
* See the License for the specific language governing permissions and
14
* limitations under the License.
17
#ifndef ANDROID_THREAD_DEFS_H
18
#define ANDROID_THREAD_DEFS_H
22
#if defined(__cplusplus)
28
* ***********************************************
29
* ** Keep in sync with android.os.Process.java **
30
* ***********************************************
32
* This maps directly to the "nice" priorities we use in Android.
33
* A thread priority should be chosen inverse-proportionally to
34
* the amount of work the thread is expected to do. The more work
35
* a thread will do, the less favorable priority it should get so that
36
* it doesn't starve the system. Threads not behaving properly might
37
* be "punished" by the kernel.
38
* Use the levels below when appropriate. Intermediate values are
39
* acceptable, preferably use the {MORE|LESS}_FAVORABLE constants below.
41
ANDROID_PRIORITY_LOWEST = 19,
43
/* use for background tasks */
44
ANDROID_PRIORITY_BACKGROUND = 10,
46
/* most threads run at normal priority */
47
ANDROID_PRIORITY_NORMAL = 0,
49
/* threads currently running a UI that the user is interacting with */
50
ANDROID_PRIORITY_FOREGROUND = -2,
52
/* the main UI thread has a slightly more favorable priority */
53
ANDROID_PRIORITY_DISPLAY = -4,
55
/* ui service treads might want to run at a urgent display (uncommon) */
56
ANDROID_PRIORITY_URGENT_DISPLAY = HAL_PRIORITY_URGENT_DISPLAY,
58
/* all normal video threads */
59
ANDROID_PRIORITY_VIDEO = -10,
61
/* all normal audio threads */
62
ANDROID_PRIORITY_AUDIO = -16,
64
/* service audio threads (uncommon) */
65
ANDROID_PRIORITY_URGENT_AUDIO = -19,
67
/* should never be used in practice. regular process might not
68
* be allowed to use this level */
69
ANDROID_PRIORITY_HIGHEST = -20,
71
ANDROID_PRIORITY_DEFAULT = ANDROID_PRIORITY_NORMAL,
72
ANDROID_PRIORITY_MORE_FAVORABLE = -1,
73
ANDROID_PRIORITY_LESS_FAVORABLE = +1,
76
#if defined(__cplusplus)
80
#endif /* ANDROID_THREAD_DEFS_H */