| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/threading/platform_thread.h" |
| |
| #include <errno.h> |
| #include <sys/resource.h> |
| |
| #include "base/android/jni_android.h" |
| #include "base/android/thread_utils.h" |
| #include "base/lazy_instance.h" |
| #include "base/logging.h" |
| #include "base/threading/thread_id_name_manager.h" |
| #include "base/tracked_objects.h" |
| #include "jni/ThreadUtils_jni.h" |
| |
| namespace base { |
| |
| namespace { |
| int ThreadNiceValue(ThreadPriority priority) { |
| // These nice values are taken from Android, which uses nice |
| // values like linux, but defines some preset nice values. |
| // Process.THREAD_PRIORITY_AUDIO = -16 |
| // Process.THREAD_PRIORITY_BACKGROUND = 10 |
| // Process.THREAD_PRIORITY_DEFAULT = 0; |
| // Process.THREAD_PRIORITY_DISPLAY = -4; |
| // Process.THREAD_PRIORITY_FOREGROUND = -2; |
| // Process.THREAD_PRIORITY_LESS_FAVORABLE = 1; |
| // Process.THREAD_PRIORITY_LOWEST = 19; |
| // Process.THREAD_PRIORITY_MORE_FAVORABLE = -1; |
| // Process.THREAD_PRIORITY_URGENT_AUDIO = -19; |
| // Process.THREAD_PRIORITY_URGENT_DISPLAY = -8; |
| // We use -6 for display, but we may want to split this |
| // into urgent (-8) and non-urgent (-4). |
| static const int threadPriorityAudio = -16; |
| static const int threadPriorityBackground = 10; |
| static const int threadPriorityDefault = 0; |
| static const int threadPriorityDisplay = -6; |
| switch (priority) { |
| case kThreadPriority_RealtimeAudio: |
| return threadPriorityAudio; |
| case kThreadPriority_Background: |
| return threadPriorityBackground; |
| case kThreadPriority_Normal: |
| return threadPriorityDefault; |
| case kThreadPriority_Display: |
| return threadPriorityDisplay; |
| default: |
| NOTREACHED() << "Unknown priority."; |
| return 0; |
| } |
| } |
| } // namespace |
| |
| //static |
| void PlatformThread::SetThreadPriority(PlatformThreadHandle handle, |
| ThreadPriority priority) { |
| // On Android, we set the Audio priority through JNI as Audio priority |
| // will also allow the process to run while it is backgrounded. |
| if (priority == kThreadPriority_RealtimeAudio) { |
| JNIEnv* env = base::android::AttachCurrentThread(); |
| Java_ThreadUtils_setThreadPriorityAudio(env, PlatformThread::CurrentId()); |
| return; |
| } |
| |
| // setpriority(2) will set a thread's priority if it is passed a tid as |
| // the 'process identifier', not affecting the rest of the threads in the |
| // process. Setting this priority will only succeed if the user has been |
| // granted permission to adjust nice values on the system. |
| DCHECK_NE(handle.id_, kInvalidThreadId); |
| int kNiceSetting = ThreadNiceValue(priority); |
| if (setpriority(PRIO_PROCESS, handle.id_, kNiceSetting)) |
| LOG(ERROR) << "Failed to set nice value of thread to " << kNiceSetting; |
| } |
| |
| void PlatformThread::SetName(const char* name) { |
| ThreadIdNameManager::GetInstance()->SetName(CurrentId(), name); |
| tracked_objects::ThreadData::InitializeThreadContext(name); |
| } |
| |
| |
| void InitThreading() { |
| } |
| |
| void InitOnThread() { |
| // Threads on linux/android may inherit their priority from the thread |
| // where they were created. This sets all new threads to the default. |
| PlatformThread::SetThreadPriority(PlatformThread::CurrentHandle(), |
| kThreadPriority_Normal); |
| } |
| |
| void TerminateOnThread() { |
| base::android::DetachFromVM(); |
| } |
| |
| size_t GetDefaultThreadStackSize(const pthread_attr_t& attributes) { |
| return 0; |
| } |
| |
| bool RegisterThreadUtils(JNIEnv* env) { |
| return RegisterNativesImpl(env); |
| } |
| |
| } // namespace base |