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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_api.h" | 13 #include "base/base_export.h" |
| 14 #include "base/basictypes.h" | 14 #include "base/basictypes.h" |
| 15 #include "build/build_config.h" | 15 #include "build/build_config.h" |
| 16 | 16 |
| 17 #if defined(OS_WIN) | 17 #if defined(OS_WIN) |
| 18 #include <windows.h> | 18 #include <windows.h> |
| 19 #elif defined(OS_POSIX) | 19 #elif defined(OS_POSIX) |
| 20 #include <pthread.h> | 20 #include <pthread.h> |
| 21 #if defined(OS_MACOSX) | 21 #if defined(OS_MACOSX) |
| 22 #include <mach/mach.h> | 22 #include <mach/mach.h> |
| 23 #else // OS_POSIX && !OS_MACOSX | 23 #else // OS_POSIX && !OS_MACOSX |
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| 48 const PlatformThreadId kInvalidThreadId = 0; | 48 const PlatformThreadId kInvalidThreadId = 0; |
| 49 | 49 |
| 50 // Valid values for SetThreadPriority() | 50 // Valid values for SetThreadPriority() |
| 51 enum ThreadPriority{ | 51 enum ThreadPriority{ |
| 52 kThreadPriority_Normal, | 52 kThreadPriority_Normal, |
| 53 // Suitable for low-latency, glitch-resistant audio. | 53 // Suitable for low-latency, glitch-resistant audio. |
| 54 kThreadPriority_RealtimeAudio | 54 kThreadPriority_RealtimeAudio |
| 55 }; | 55 }; |
| 56 | 56 |
| 57 // A namespace for low-level thread functions. | 57 // A namespace for low-level thread functions. |
| 58 class BASE_API PlatformThread { | 58 class BASE_EXPORT PlatformThread { |
| 59 public: | 59 public: |
| 60 // Implement this interface to run code on a background thread. Your | 60 // Implement this interface to run code on a background thread. Your |
| 61 // ThreadMain method will be called on the newly created thread. | 61 // ThreadMain method will be called on the newly created thread. |
| 62 class BASE_API Delegate { | 62 class BASE_EXPORT Delegate { |
| 63 public: | 63 public: |
| 64 virtual ~Delegate() {} | 64 virtual ~Delegate() {} |
| 65 virtual void ThreadMain() = 0; | 65 virtual void ThreadMain() = 0; |
| 66 }; | 66 }; |
| 67 | 67 |
| 68 // Gets the current thread id, which may be useful for logging purposes. | 68 // Gets the current thread id, which may be useful for logging purposes. |
| 69 static PlatformThreadId CurrentId(); | 69 static PlatformThreadId CurrentId(); |
| 70 | 70 |
| 71 // Yield the current thread so another thread can be scheduled. | 71 // Yield the current thread so another thread can be scheduled. |
| 72 static void YieldCurrentThread(); | 72 static void YieldCurrentThread(); |
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| 101 static void SetThreadPriority(PlatformThreadHandle handle, | 101 static void SetThreadPriority(PlatformThreadHandle handle, |
| 102 ThreadPriority priority); | 102 ThreadPriority priority); |
| 103 | 103 |
| 104 private: | 104 private: |
| 105 DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformThread); | 105 DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformThread); |
| 106 }; | 106 }; |
| 107 | 107 |
| 108 } // namespace base | 108 } // namespace base |
| 109 | 109 |
| 110 #endif // BASE_THREADING_PLATFORM_THREAD_H_ | 110 #endif // BASE_THREADING_PLATFORM_THREAD_H_ |
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