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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 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 | 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 | 11 |
| 12 #include "base/base_export.h" | 12 #include "base/base_export.h" |
| 13 #include "base/basictypes.h" | 13 #include "base/basictypes.h" |
| 14 #include "base/time/time.h" | 14 #include "base/time/time.h" |
| 15 #include "build/build_config.h" | 15 #include "build/build_config.h" |
| 16 | 16 |
| 17 #if defined(OS_WIN) | 17 #if defined(OS_POSIX) |
| 18 #include <windows.h> | |
| 19 #elif defined(OS_POSIX) | |
| 20 #include <pthread.h> | 18 #include <pthread.h> |
| 21 #include <unistd.h> | 19 #include <unistd.h> |
| 22 #endif | 20 #endif |
| 23 | 21 |
| 24 namespace base { | 22 namespace base { |
| 25 | 23 |
| 26 // Used for logging. Always an integer value. | 24 // Used for logging. Always an integer value. |
| 27 #if defined(OS_WIN) | 25 #if defined(OS_POSIX) |
| 28 typedef DWORD PlatformThreadId; | |
| 29 #elif defined(OS_POSIX) | |
| 30 typedef pid_t PlatformThreadId; | 26 typedef pid_t PlatformThreadId; |
| 31 #endif | 27 #endif |
| 32 | 28 |
| 33 // Used for thread checking and debugging. | 29 // Used for thread checking and debugging. |
| 34 // Meant to be as fast as possible. | 30 // Meant to be as fast as possible. |
| 35 // These are produced by PlatformThread::CurrentRef(), and used to later | 31 // These are produced by PlatformThread::CurrentRef(), and used to later |
| 36 // check if we are on the same thread or not by using ==. These are safe | 32 // check if we are on the same thread or not by using ==. These are safe |
| 37 // to copy between threads, but can't be copied to another process as they | 33 // to copy between threads, but can't be copied to another process as they |
| 38 // have no meaning there. Also, the internal identifier can be re-used | 34 // have no meaning there. Also, the internal identifier can be re-used |
| 39 // after a thread dies, so a PlatformThreadRef cannot be reliably used | 35 // after a thread dies, so a PlatformThreadRef cannot be reliably used |
| 40 // to distinguish a new thread from an old, dead thread. | 36 // to distinguish a new thread from an old, dead thread. |
| 41 class PlatformThreadRef { | 37 class PlatformThreadRef { |
| 42 public: | 38 public: |
| 43 #if defined(OS_WIN) | 39 #if defined(OS_POSIX) |
| 44 typedef DWORD RefType; | |
| 45 #elif defined(OS_POSIX) | |
| 46 typedef pthread_t RefType; | 40 typedef pthread_t RefType; |
| 47 #endif | 41 #endif |
| 48 PlatformThreadRef() | 42 PlatformThreadRef() |
| 49 : id_(0) { | 43 : id_(0) { |
| 50 } | 44 } |
| 51 | 45 |
| 52 explicit PlatformThreadRef(RefType id) | 46 explicit PlatformThreadRef(RefType id) |
| 53 : id_(id) { | 47 : id_(id) { |
| 54 } | 48 } |
| 55 | 49 |
| 56 bool operator==(PlatformThreadRef other) const { | 50 bool operator==(PlatformThreadRef other) const { |
| 57 return id_ == other.id_; | 51 return id_ == other.id_; |
| 58 } | 52 } |
| 59 | 53 |
| 60 bool is_null() const { | 54 bool is_null() const { |
| 61 return id_ == 0; | 55 return id_ == 0; |
| 62 } | 56 } |
| 63 private: | 57 private: |
| 64 RefType id_; | 58 RefType id_; |
| 65 }; | 59 }; |
| 66 | 60 |
| 67 // Used to operate on threads. | 61 // Used to operate on threads. |
| 68 class PlatformThreadHandle { | 62 class PlatformThreadHandle { |
| 69 public: | 63 public: |
| 70 #if defined(OS_WIN) | 64 #if defined(OS_POSIX) |
| 71 typedef void* Handle; | |
| 72 #elif defined(OS_POSIX) | |
| 73 typedef pthread_t Handle; | 65 typedef pthread_t Handle; |
| 74 #endif | 66 #endif |
| 75 | 67 |
| 76 PlatformThreadHandle() | 68 PlatformThreadHandle() |
| 77 : handle_(0), | 69 : handle_(0), |
| 78 id_(0) { | 70 id_(0) { |
| 79 } | 71 } |
| 80 | 72 |
| 81 explicit PlatformThreadHandle(Handle handle) | 73 explicit PlatformThreadHandle(Handle handle) |
| 82 : handle_(handle), | 74 : handle_(handle), |
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| 202 | 194 |
| 203 static ThreadPriority GetThreadPriority(PlatformThreadHandle handle); | 195 static ThreadPriority GetThreadPriority(PlatformThreadHandle handle); |
| 204 | 196 |
| 205 private: | 197 private: |
| 206 DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformThread); | 198 DISALLOW_IMPLICIT_CONSTRUCTORS(PlatformThread); |
| 207 }; | 199 }; |
| 208 | 200 |
| 209 } // namespace base | 201 } // namespace base |
| 210 | 202 |
| 211 #endif // BASE_THREADING_PLATFORM_THREAD_H_ | 203 #endif // BASE_THREADING_PLATFORM_THREAD_H_ |
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