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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/threading/platform_thread.h" | 5 #include "base/threading/platform_thread.h" |
6 | 6 |
7 #include <errno.h> | 7 #include <errno.h> |
8 #include <sched.h> | 8 #include <sched.h> |
9 | 9 |
10 #include "base/lazy_instance.h" | 10 #include "base/lazy_instance.h" |
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29 #endif | 29 #endif |
30 } // namespace | 30 } // namespace |
31 | 31 |
32 const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4] = { | 32 const ThreadPriorityToNiceValuePair kThreadPriorityToNiceValueMap[4] = { |
33 { kThreadPriority_RealtimeAudio, -10 }, | 33 { kThreadPriority_RealtimeAudio, -10 }, |
34 { kThreadPriority_Background, 10 }, | 34 { kThreadPriority_Background, 10 }, |
35 { kThreadPriority_Normal, 0 }, | 35 { kThreadPriority_Normal, 0 }, |
36 { kThreadPriority_Display, -6 }, | 36 { kThreadPriority_Display, -6 }, |
37 } | 37 } |
38 | 38 |
39 bool HandleSetThreadPriorityForPlatform(PlatformThreadHandle handle, | 39 bool SetThreadPriorityForPlatform(PlatformThreadHandle handle, |
40 ThreadPriority priority) { | 40 ThreadPriority priority) { |
41 #if !defined(OS_NACL) | 41 #if !defined(OS_NACL) |
| 42 // TODO(gab): Assess the correctness of using |pthread_self()| below instead |
| 43 // of |handle|. http://crbug.com/468793. |
42 return priority == kThreadPriority_RealtimeAudio && | 44 return priority == kThreadPriority_RealtimeAudio && |
43 pthread_setschedparam(pthread_self(), SCHED_RR, &kRealTimePrio) == 0; | 45 pthread_setschedparam(pthread_self(), SCHED_RR, &kRealTimePrio) == 0; |
44 #else | 46 #else |
45 return false; | 47 return false; |
46 #endif | 48 #endif |
47 } | 49 } |
48 | 50 |
| 51 bool GetThreadPriorityForPlatform(PlatformThreadHandle handle, |
| 52 ThreadPriority* priority) { |
| 53 #if !defined(OS_NACL) |
| 54 // TODO(gab): Assess the correctness of using |pthread_self()| below instead |
| 55 // of |handle|. http://crbug.com/468793. |
| 56 int maybe_sched_rr = 0; |
| 57 struct sched_param maybe_realtime_prio = {0}; |
| 58 if (pthread_getschedparam(pthread_self(), &maybe_sched_rr, |
| 59 &maybe_realtime_prio) == 0 && |
| 60 maybe_sched_rr == SCHED_RR && |
| 61 maybe_realtime_prio.sched_priority == kRealTimePrio.sched_priority) { |
| 62 *priority = kThreadPriority_RealtimeAudio; |
| 63 return true; |
| 64 } |
| 65 #endif |
| 66 return false; |
| 67 } |
| 68 |
49 } // namespace internal | 69 } // namespace internal |
50 | 70 |
51 // static | 71 // static |
52 void PlatformThread::SetName(const char* name) { | 72 void PlatformThread::SetName(const char* name) { |
53 ThreadIdNameManager::GetInstance()->SetName(CurrentId(), name); | 73 ThreadIdNameManager::GetInstance()->SetName(CurrentId(), name); |
54 tracked_objects::ThreadData::InitializeThreadContext(name); | 74 tracked_objects::ThreadData::InitializeThreadContext(name); |
55 | 75 |
56 #if !defined(OS_NACL) | 76 #if !defined(OS_NACL) |
57 // On FreeBSD we can get the thread names to show up in the debugger by | 77 // On FreeBSD we can get the thread names to show up in the debugger by |
58 // setting the process name for the LWP. We don't want to do this for the | 78 // setting the process name for the LWP. We don't want to do this for the |
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74 #if !defined(THREAD_SANITIZER) | 94 #if !defined(THREAD_SANITIZER) |
75 return 0; | 95 return 0; |
76 #else | 96 #else |
77 // ThreadSanitizer bloats the stack heavily. Evidence has been that the | 97 // ThreadSanitizer bloats the stack heavily. Evidence has been that the |
78 // default stack size isn't enough for some browser tests. | 98 // default stack size isn't enough for some browser tests. |
79 return 2 * (1 << 23); // 2 times 8192K (the default stack size on Linux). | 99 return 2 * (1 << 23); // 2 times 8192K (the default stack size on Linux). |
80 #endif | 100 #endif |
81 } | 101 } |
82 | 102 |
83 } // namespace base | 103 } // namespace base |
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