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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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