| // 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/prctl.h> |
| #include <sys/resource.h> |
| #include <sys/types.h> |
| #include <unistd.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/platform_thread_internal_posix.h" |
| #include "base/threading/thread_id_name_manager.h" |
| #include "base/tracked_objects.h" |
| #include "jni/ThreadUtils_jni.h" |
| |
| namespace base { |
| |
| namespace internal { |
| |
| // 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). |
| const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4] = { |
| {ThreadPriority::BACKGROUND, 10}, |
| {ThreadPriority::NORMAL, 0}, |
| {ThreadPriority::DISPLAY, -6}, |
| {ThreadPriority::REALTIME_AUDIO, -16}, |
| }; |
| |
| bool SetThreadPriorityForPlatform(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 == ThreadPriority::REALTIME_AUDIO) { |
| JNIEnv* env = base::android::AttachCurrentThread(); |
| Java_ThreadUtils_setThreadPriorityAudio(env, PlatformThread::CurrentId()); |
| return true; |
| } |
| return false; |
| } |
| |
| bool GetThreadPriorityForPlatform(PlatformThreadHandle handle, |
| ThreadPriority* priority) { |
| NOTIMPLEMENTED(); |
| return false; |
| } |
| |
| } // namespace internal |
| |
| void PlatformThread::SetName(const std::string& name) { |
| ThreadIdNameManager::GetInstance()->SetName(CurrentId(), name); |
| tracked_objects::ThreadData::InitializeThreadContext(name); |
| |
| // Like linux, on android we can get the thread names to show up in the |
| // debugger by setting the process name for the LWP. |
| // We don't want to do this for the main thread because that would rename |
| // the process, causing tools like killall to stop working. |
| if (PlatformThread::CurrentId() == getpid()) |
| return; |
| |
| // Set the name for the LWP (which gets truncated to 15 characters). |
| int err = prctl(PR_SET_NAME, name.c_str()); |
| if (err < 0 && errno != EPERM) |
| DPLOG(ERROR) << "prctl(PR_SET_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(), |
| ThreadPriority::NORMAL); |
| } |
| |
| void TerminateOnThread() { |
| base::android::DetachFromVM(); |
| } |
| |
| size_t GetDefaultThreadStackSize(const pthread_attr_t& attributes) { |
| #if !defined(ADDRESS_SANITIZER) |
| return 0; |
| #else |
| // AddressSanitizer bloats the stack approximately 2x. Default stack size of |
| // 1Mb is not enough for some tests (see http://crbug.com/263749 for example). |
| return 2 * (1 << 20); // 2Mb |
| #endif |
| } |
| |
| bool RegisterThreadUtils(JNIEnv* env) { |
| return RegisterNativesImpl(env); |
| } |
| |
| } // namespace base |