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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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 // WARNING: You should *NOT* be using this class directly. PlatformThread is | 5 // WARNING: You should *NOT* be using this class directly. PlatformThread is |
6 // the low-level platform-specific abstraction to the OS's threading interface. | 6 // the low-level platform-specific abstraction to the OS's threading interface. |
7 // You should instead be using a message-loop driven Thread, see thread.h. | 7 // You should instead be using a message-loop driven Thread, see thread.h. |
8 | 8 |
9 #ifndef BASE_THREADING_PLATFORM_THREAD_H_ | 9 #ifndef BASE_THREADING_PLATFORM_THREAD_H_ |
10 #define BASE_THREADING_PLATFORM_THREAD_H_ | 10 #define BASE_THREADING_PLATFORM_THREAD_H_ |
11 #pragma once | 11 #pragma once |
12 | 12 |
13 #include "base/base_export.h" | 13 #include "base/base_export.h" |
14 #include "base/basictypes.h" | 14 #include "base/basictypes.h" |
15 #include "base/time.h" | 15 #include "base/time.h" |
16 #include "build/build_config.h" | 16 #include "build/build_config.h" |
17 | 17 |
18 #if defined(OS_WIN) | 18 #if defined(OS_WIN) |
19 #include <windows.h> | 19 #include <windows.h> |
20 #elif defined(OS_POSIX) | 20 #elif defined(OS_POSIX) |
21 #include <pthread.h> | 21 #include <pthread.h> |
22 #if defined(OS_MACOSX) | |
23 #include <mach/mach.h> | |
24 #else // OS_POSIX && !OS_MACOSX | |
25 #include <unistd.h> | 22 #include <unistd.h> |
26 #endif | 23 #endif |
27 #endif | |
28 | 24 |
29 namespace base { | 25 namespace base { |
30 | 26 |
31 // PlatformThreadHandle should not be assumed to be a numeric type, since the | 27 // PlatformThreadHandle should not be assumed to be a numeric type, since the |
32 // standard intends to allow pthread_t to be a structure. This means you | 28 // standard intends to allow pthread_t to be a structure. This means you |
33 // should not initialize it to a value, like 0. If it's a member variable, the | 29 // should not initialize it to a value, like 0. If it's a member variable, the |
34 // constructor can safely "value initialize" using () in the initializer list. | 30 // constructor can safely "value initialize" using () in the initializer list. |
35 #if defined(OS_WIN) | 31 #if defined(OS_WIN) |
36 typedef DWORD PlatformThreadId; | 32 typedef DWORD PlatformThreadId; |
37 typedef void* PlatformThreadHandle; // HANDLE | 33 typedef void* PlatformThreadHandle; // HANDLE |
38 const PlatformThreadHandle kNullThreadHandle = NULL; | 34 const PlatformThreadHandle kNullThreadHandle = NULL; |
39 #elif defined(OS_POSIX) | 35 #elif defined(OS_POSIX) |
40 typedef pthread_t PlatformThreadHandle; | 36 typedef pthread_t PlatformThreadHandle; |
41 const PlatformThreadHandle kNullThreadHandle = 0; | 37 const PlatformThreadHandle kNullThreadHandle = 0; |
42 #if defined(OS_MACOSX) | |
43 typedef mach_port_t PlatformThreadId; | |
44 #else // OS_POSIX && !OS_MACOSX | |
45 typedef pid_t PlatformThreadId; | 38 typedef pid_t PlatformThreadId; |
46 #endif | 39 #endif |
47 #endif | |
48 | 40 |
49 const PlatformThreadId kInvalidThreadId = 0; | 41 const PlatformThreadId kInvalidThreadId = 0; |
50 | 42 |
51 // Valid values for SetThreadPriority() | 43 // Valid values for SetThreadPriority() |
52 enum ThreadPriority{ | 44 enum ThreadPriority{ |
53 kThreadPriority_Normal, | 45 kThreadPriority_Normal, |
54 // Suitable for low-latency, glitch-resistant audio. | 46 // Suitable for low-latency, glitch-resistant audio. |
55 kThreadPriority_RealtimeAudio | 47 kThreadPriority_RealtimeAudio |
56 }; | 48 }; |
57 | 49 |
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110 static void SetThreadPriority(PlatformThreadHandle handle, | 102 static void SetThreadPriority(PlatformThreadHandle handle, |
111 ThreadPriority priority); | 103 ThreadPriority priority); |
112 | 104 |
113 private: | 105 private: |
114 DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformThread); | 106 DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformThread); |
115 }; | 107 }; |
116 | 108 |
117 } // namespace base | 109 } // namespace base |
118 | 110 |
119 #endif // BASE_THREADING_PLATFORM_THREAD_H_ | 111 #endif // BASE_THREADING_PLATFORM_THREAD_H_ |
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