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Side by Side Diff: base/threading/simple_thread.h

Issue 7461141: Rename BASE_API to BASE_EXPORT. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 4 months ago
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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 probably be using Thread (thread.h) instead. Thread is 5 // WARNING: You should probably be using Thread (thread.h) instead. Thread is
6 // Chrome's message-loop based Thread abstraction, and if you are a 6 // Chrome's message-loop based Thread abstraction, and if you are a
7 // thread running in the browser, there will likely be assumptions 7 // thread running in the browser, there will likely be assumptions
8 // that your thread will have an associated message loop. 8 // that your thread will have an associated message loop.
9 // 9 //
10 // This is a simple thread interface that backs to a native operating system 10 // This is a simple thread interface that backs to a native operating system
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38 // // or Start again. 38 // // or Start again.
39 39
40 #ifndef BASE_THREADING_SIMPLE_THREAD_H_ 40 #ifndef BASE_THREADING_SIMPLE_THREAD_H_
41 #define BASE_THREADING_SIMPLE_THREAD_H_ 41 #define BASE_THREADING_SIMPLE_THREAD_H_
42 #pragma once 42 #pragma once
43 43
44 #include <string> 44 #include <string>
45 #include <queue> 45 #include <queue>
46 #include <vector> 46 #include <vector>
47 47
48 #include "base/base_api.h" 48 #include "base/base_export.h"
49 #include "base/basictypes.h" 49 #include "base/basictypes.h"
50 #include "base/threading/platform_thread.h" 50 #include "base/threading/platform_thread.h"
51 #include "base/synchronization/lock.h" 51 #include "base/synchronization/lock.h"
52 #include "base/synchronization/waitable_event.h" 52 #include "base/synchronization/waitable_event.h"
53 53
54 namespace base { 54 namespace base {
55 55
56 // This is the base SimpleThread. You can derive from it and implement the 56 // This is the base SimpleThread. You can derive from it and implement the
57 // virtual Run method, or you can use the DelegateSimpleThread interface. 57 // virtual Run method, or you can use the DelegateSimpleThread interface.
58 class BASE_API SimpleThread : public PlatformThread::Delegate { 58 class BASE_EXPORT SimpleThread : public PlatformThread::Delegate {
59 public: 59 public:
60 class BASE_API Options { 60 class BASE_EXPORT Options {
61 public: 61 public:
62 Options() : stack_size_(0) { } 62 Options() : stack_size_(0) { }
63 ~Options() { } 63 ~Options() { }
64 64
65 // We use the standard compiler-supplied copy constructor. 65 // We use the standard compiler-supplied copy constructor.
66 66
67 // A custom stack size, or 0 for the system default. 67 // A custom stack size, or 0 for the system default.
68 void set_stack_size(size_t size) { stack_size_ = size; } 68 void set_stack_size(size_t size) { stack_size_ = size; }
69 size_t stack_size() const { return stack_size_; } 69 size_t stack_size() const { return stack_size_; }
70 private: 70 private:
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113 private: 113 private:
114 const std::string name_prefix_; 114 const std::string name_prefix_;
115 std::string name_; 115 std::string name_;
116 const Options options_; 116 const Options options_;
117 PlatformThreadHandle thread_; // PlatformThread handle, invalid after Join! 117 PlatformThreadHandle thread_; // PlatformThread handle, invalid after Join!
118 WaitableEvent event_; // Signaled if Start() was ever called. 118 WaitableEvent event_; // Signaled if Start() was ever called.
119 PlatformThreadId tid_; // The backing thread's id. 119 PlatformThreadId tid_; // The backing thread's id.
120 bool joined_; // True if Join has been called. 120 bool joined_; // True if Join has been called.
121 }; 121 };
122 122
123 class BASE_API DelegateSimpleThread : public SimpleThread { 123 class BASE_EXPORT DelegateSimpleThread : public SimpleThread {
124 public: 124 public:
125 class BASE_API Delegate { 125 class BASE_EXPORT Delegate {
126 public: 126 public:
127 Delegate() { } 127 Delegate() { }
128 virtual ~Delegate() { } 128 virtual ~Delegate() { }
129 virtual void Run() = 0; 129 virtual void Run() = 0;
130 }; 130 };
131 131
132 DelegateSimpleThread(Delegate* delegate, 132 DelegateSimpleThread(Delegate* delegate,
133 const std::string& name_prefix); 133 const std::string& name_prefix);
134 DelegateSimpleThread(Delegate* delegate, 134 DelegateSimpleThread(Delegate* delegate,
135 const std::string& name_prefix, 135 const std::string& name_prefix,
136 const Options& options); 136 const Options& options);
137 137
138 virtual ~DelegateSimpleThread(); 138 virtual ~DelegateSimpleThread();
139 virtual void Run(); 139 virtual void Run();
140 private: 140 private:
141 Delegate* delegate_; 141 Delegate* delegate_;
142 }; 142 };
143 143
144 // DelegateSimpleThreadPool allows you to start up a fixed number of threads, 144 // DelegateSimpleThreadPool allows you to start up a fixed number of threads,
145 // and then add jobs which will be dispatched to the threads. This is 145 // and then add jobs which will be dispatched to the threads. This is
146 // convenient when you have a lot of small work that you want done 146 // convenient when you have a lot of small work that you want done
147 // multi-threaded, but don't want to spawn a thread for each small bit of work. 147 // multi-threaded, but don't want to spawn a thread for each small bit of work.
148 // 148 //
149 // You just call AddWork() to add a delegate to the list of work to be done. 149 // You just call AddWork() to add a delegate to the list of work to be done.
150 // JoinAll() will make sure that all outstanding work is processed, and wait 150 // JoinAll() will make sure that all outstanding work is processed, and wait
151 // for everything to finish. You can reuse a pool, so you can call Start() 151 // for everything to finish. You can reuse a pool, so you can call Start()
152 // again after you've called JoinAll(). 152 // again after you've called JoinAll().
153 class BASE_API DelegateSimpleThreadPool 153 class BASE_EXPORT DelegateSimpleThreadPool
154 : public DelegateSimpleThread::Delegate { 154 : public DelegateSimpleThread::Delegate {
155 public: 155 public:
156 typedef DelegateSimpleThread::Delegate Delegate; 156 typedef DelegateSimpleThread::Delegate Delegate;
157 157
158 DelegateSimpleThreadPool(const std::string& name_prefix, int num_threads); 158 DelegateSimpleThreadPool(const std::string& name_prefix, int num_threads);
159 virtual ~DelegateSimpleThreadPool(); 159 virtual ~DelegateSimpleThreadPool();
160 160
161 // Start up all of the underlying threads, and start processing work if we 161 // Start up all of the underlying threads, and start processing work if we
162 // have any. 162 // have any.
163 void Start(); 163 void Start();
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181 int num_threads_; 181 int num_threads_;
182 std::vector<DelegateSimpleThread*> threads_; 182 std::vector<DelegateSimpleThread*> threads_;
183 std::queue<Delegate*> delegates_; 183 std::queue<Delegate*> delegates_;
184 base::Lock lock_; // Locks delegates_ 184 base::Lock lock_; // Locks delegates_
185 WaitableEvent dry_; // Not signaled when there is no work to do. 185 WaitableEvent dry_; // Not signaled when there is no work to do.
186 }; 186 };
187 187
188 } // namespace base 188 } // namespace base
189 189
190 #endif // BASE_THREADING_SIMPLE_THREAD_H_ 190 #endif // BASE_THREADING_SIMPLE_THREAD_H_
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