Index: base/threading/platform_thread_android.cc |
diff --git a/base/threading/platform_thread_android.cc b/base/threading/platform_thread_android.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..28026350b66acbb03e09956f3a9f1f0e882a9908 |
--- /dev/null |
+++ b/base/threading/platform_thread_android.cc |
@@ -0,0 +1,105 @@ |
+// 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 |