Fake PO2TS GetRequestContext should return NULL.
[chromium-blink-merge.git] / base / threading / platform_thread_android.cc
blobbd0b4b33db74a137fa1dd0508f39586362857d5a
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "base/threading/platform_thread.h"
7 #include <errno.h>
8 #include <sys/prctl.h>
9 #include <sys/resource.h>
11 #include "base/android/jni_android.h"
12 #include "base/android/thread_utils.h"
13 #include "base/lazy_instance.h"
14 #include "base/logging.h"
15 #include "base/threading/thread_id_name_manager.h"
16 #include "base/tracked_objects.h"
17 #include "jni/ThreadUtils_jni.h"
19 namespace base {
21 namespace {
22 int ThreadNiceValue(ThreadPriority priority) {
23 // These nice values are taken from Android, which uses nice
24 // values like linux, but defines some preset nice values.
25 // Process.THREAD_PRIORITY_AUDIO = -16
26 // Process.THREAD_PRIORITY_BACKGROUND = 10
27 // Process.THREAD_PRIORITY_DEFAULT = 0;
28 // Process.THREAD_PRIORITY_DISPLAY = -4;
29 // Process.THREAD_PRIORITY_FOREGROUND = -2;
30 // Process.THREAD_PRIORITY_LESS_FAVORABLE = 1;
31 // Process.THREAD_PRIORITY_LOWEST = 19;
32 // Process.THREAD_PRIORITY_MORE_FAVORABLE = -1;
33 // Process.THREAD_PRIORITY_URGENT_AUDIO = -19;
34 // Process.THREAD_PRIORITY_URGENT_DISPLAY = -8;
35 // We use -6 for display, but we may want to split this
36 // into urgent (-8) and non-urgent (-4).
37 static const int threadPriorityAudio = -16;
38 static const int threadPriorityBackground = 10;
39 static const int threadPriorityDefault = 0;
40 static const int threadPriorityDisplay = -6;
41 switch (priority) {
42 case kThreadPriority_RealtimeAudio:
43 return threadPriorityAudio;
44 case kThreadPriority_Background:
45 return threadPriorityBackground;
46 case kThreadPriority_Normal:
47 return threadPriorityDefault;
48 case kThreadPriority_Display:
49 return threadPriorityDisplay;
50 default:
51 NOTREACHED() << "Unknown priority.";
52 return 0;
55 } // namespace
57 //static
58 void PlatformThread::SetThreadPriority(PlatformThreadHandle handle,
59 ThreadPriority priority) {
60 // On Android, we set the Audio priority through JNI as Audio priority
61 // will also allow the process to run while it is backgrounded.
62 if (priority == kThreadPriority_RealtimeAudio) {
63 JNIEnv* env = base::android::AttachCurrentThread();
64 Java_ThreadUtils_setThreadPriorityAudio(env, PlatformThread::CurrentId());
65 return;
68 // setpriority(2) will set a thread's priority if it is passed a tid as
69 // the 'process identifier', not affecting the rest of the threads in the
70 // process. Setting this priority will only succeed if the user has been
71 // granted permission to adjust nice values on the system.
72 DCHECK_NE(handle.id_, kInvalidThreadId);
73 int kNiceSetting = ThreadNiceValue(priority);
74 if (setpriority(PRIO_PROCESS, handle.id_, kNiceSetting))
75 LOG(ERROR) << "Failed to set nice value of thread to " << kNiceSetting;
78 void PlatformThread::SetName(const char* name) {
79 ThreadIdNameManager::GetInstance()->SetName(CurrentId(), name);
80 tracked_objects::ThreadData::InitializeThreadContext(name);
82 // Like linux, on android we can get the thread names to show up in the
83 // debugger by setting the process name for the LWP.
84 // We don't want to do this for the main thread because that would rename
85 // the process, causing tools like killall to stop working.
86 if (PlatformThread::CurrentId() == getpid())
87 return;
89 // Set the name for the LWP (which gets truncated to 15 characters).
90 int err = prctl(PR_SET_NAME, name);
91 if (err < 0 && errno != EPERM)
92 DPLOG(ERROR) << "prctl(PR_SET_NAME)";
96 void InitThreading() {
99 void InitOnThread() {
100 // Threads on linux/android may inherit their priority from the thread
101 // where they were created. This sets all new threads to the default.
102 PlatformThread::SetThreadPriority(PlatformThread::CurrentHandle(),
103 kThreadPriority_Normal);
106 void TerminateOnThread() {
107 base::android::DetachFromVM();
110 size_t GetDefaultThreadStackSize(const pthread_attr_t& attributes) {
111 #if !defined(ADDRESS_SANITIZER)
112 return 0;
113 #else
114 // AddressSanitizer bloats the stack approximately 2x. Default stack size of
115 // 1Mb is not enough for some tests (see http://crbug.com/263749 for example).
116 return 2 * (1 << 20); // 2Mb
117 #endif
120 bool RegisterThreadUtils(JNIEnv* env) {
121 return RegisterNativesImpl(env);
124 } // namespace base