/usr/include/android/utils/ThreadDefs.h is in android-libutils-dev 21-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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 _LIBS_UTILS_THREAD_DEFS_H
#define _LIBS_UTILS_THREAD_DEFS_H
#include <stdint.h>
#include <sys/types.h>
#include <system/graphics.h>
// ---------------------------------------------------------------------------
// C API
#ifdef __cplusplus
extern "C" {
#endif
typedef void* android_thread_id_t;
typedef int (*android_thread_func_t)(void*);
enum {
/*
* ***********************************************
* ** Keep in sync with android.os.Process.java **
* ***********************************************
*
* This maps directly to the "nice" priorities we use in Android.
* A thread priority should be chosen inverse-proportionally to
* the amount of work the thread is expected to do. The more work
* a thread will do, the less favorable priority it should get so that
* it doesn't starve the system. Threads not behaving properly might
* be "punished" by the kernel.
* Use the levels below when appropriate. Intermediate values are
* acceptable, preferably use the {MORE|LESS}_FAVORABLE constants below.
*/
ANDROID_PRIORITY_LOWEST = 19,
/* use for background tasks */
ANDROID_PRIORITY_BACKGROUND = 10,
/* most threads run at normal priority */
ANDROID_PRIORITY_NORMAL = 0,
/* threads currently running a UI that the user is interacting with */
ANDROID_PRIORITY_FOREGROUND = -2,
/* the main UI thread has a slightly more favorable priority */
ANDROID_PRIORITY_DISPLAY = -4,
/* ui service treads might want to run at a urgent display (uncommon) */
ANDROID_PRIORITY_URGENT_DISPLAY = HAL_PRIORITY_URGENT_DISPLAY,
/* all normal audio threads */
ANDROID_PRIORITY_AUDIO = -16,
/* service audio threads (uncommon) */
ANDROID_PRIORITY_URGENT_AUDIO = -19,
/* should never be used in practice. regular process might not
* be allowed to use this level */
ANDROID_PRIORITY_HIGHEST = -20,
ANDROID_PRIORITY_DEFAULT = ANDROID_PRIORITY_NORMAL,
ANDROID_PRIORITY_MORE_FAVORABLE = -1,
ANDROID_PRIORITY_LESS_FAVORABLE = +1,
};
#ifdef __cplusplus
} // extern "C"
#endif
// ---------------------------------------------------------------------------
// C++ API
#ifdef __cplusplus
namespace android {
// ---------------------------------------------------------------------------
typedef android_thread_id_t thread_id_t;
typedef android_thread_func_t thread_func_t;
enum {
PRIORITY_LOWEST = ANDROID_PRIORITY_LOWEST,
PRIORITY_BACKGROUND = ANDROID_PRIORITY_BACKGROUND,
PRIORITY_NORMAL = ANDROID_PRIORITY_NORMAL,
PRIORITY_FOREGROUND = ANDROID_PRIORITY_FOREGROUND,
PRIORITY_DISPLAY = ANDROID_PRIORITY_DISPLAY,
PRIORITY_URGENT_DISPLAY = ANDROID_PRIORITY_URGENT_DISPLAY,
PRIORITY_AUDIO = ANDROID_PRIORITY_AUDIO,
PRIORITY_URGENT_AUDIO = ANDROID_PRIORITY_URGENT_AUDIO,
PRIORITY_HIGHEST = ANDROID_PRIORITY_HIGHEST,
PRIORITY_DEFAULT = ANDROID_PRIORITY_DEFAULT,
PRIORITY_MORE_FAVORABLE = ANDROID_PRIORITY_MORE_FAVORABLE,
PRIORITY_LESS_FAVORABLE = ANDROID_PRIORITY_LESS_FAVORABLE,
};
// ---------------------------------------------------------------------------
}; // namespace android
#endif // __cplusplus
// ---------------------------------------------------------------------------
#endif // _LIBS_UTILS_THREAD_DEFS_H
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