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

Issue 6729002: Base: A few more files using BASE_API (for base.dll) (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: Created 9 years, 9 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
(...skipping 27 matching lines...) Expand all
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/basictypes.h" 49 #include "base/basictypes.h"
49 #include "base/threading/platform_thread.h" 50 #include "base/threading/platform_thread.h"
50 #include "base/synchronization/lock.h" 51 #include "base/synchronization/lock.h"
51 #include "base/synchronization/waitable_event.h" 52 #include "base/synchronization/waitable_event.h"
52 53
53 namespace base { 54 namespace base {
54 55
55 // 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
56 // virtual Run method, or you can use the DelegateSimpleThread interface. 57 // virtual Run method, or you can use the DelegateSimpleThread interface.
57 class SimpleThread : public PlatformThread::Delegate { 58 class BASE_API SimpleThread : public PlatformThread::Delegate {
58 public: 59 public:
59 class Options { 60 class BASE_API Options {
60 public: 61 public:
61 Options() : stack_size_(0) { } 62 Options() : stack_size_(0) { }
62 ~Options() { } 63 ~Options() { }
63 64
64 // We use the standard compiler-supplied copy constructor. 65 // We use the standard compiler-supplied copy constructor.
65 66
66 // A custom stack size, or 0 for the system default. 67 // A custom stack size, or 0 for the system default.
67 void set_stack_size(size_t size) { stack_size_ = size; } 68 void set_stack_size(size_t size) { stack_size_ = size; }
68 size_t stack_size() const { return stack_size_; } 69 size_t stack_size() const { return stack_size_; }
69 private: 70 private:
(...skipping 36 matching lines...) Expand 10 before | Expand all | Expand 10 after
106 private: 107 private:
107 const std::string name_prefix_; 108 const std::string name_prefix_;
108 std::string name_; 109 std::string name_;
109 const Options options_; 110 const Options options_;
110 PlatformThreadHandle thread_; // PlatformThread handle, invalid after Join! 111 PlatformThreadHandle thread_; // PlatformThread handle, invalid after Join!
111 WaitableEvent event_; // Signaled if Start() was ever called. 112 WaitableEvent event_; // Signaled if Start() was ever called.
112 PlatformThreadId tid_; // The backing thread's id. 113 PlatformThreadId tid_; // The backing thread's id.
113 bool joined_; // True if Join has been called. 114 bool joined_; // True if Join has been called.
114 }; 115 };
115 116
116 class DelegateSimpleThread : public SimpleThread { 117 class BASE_API DelegateSimpleThread : public SimpleThread {
117 public: 118 public:
118 class Delegate { 119 class BASE_API Delegate {
119 public: 120 public:
120 Delegate() { } 121 Delegate() { }
121 virtual ~Delegate() { } 122 virtual ~Delegate() { }
122 virtual void Run() = 0; 123 virtual void Run() = 0;
123 }; 124 };
124 125
125 DelegateSimpleThread(Delegate* delegate, 126 DelegateSimpleThread(Delegate* delegate,
126 const std::string& name_prefix); 127 const std::string& name_prefix);
127 DelegateSimpleThread(Delegate* delegate, 128 DelegateSimpleThread(Delegate* delegate,
128 const std::string& name_prefix, 129 const std::string& name_prefix,
129 const Options& options); 130 const Options& options);
130 131
131 virtual ~DelegateSimpleThread(); 132 virtual ~DelegateSimpleThread();
132 virtual void Run(); 133 virtual void Run();
133 private: 134 private:
134 Delegate* delegate_; 135 Delegate* delegate_;
135 }; 136 };
136 137
137 // DelegateSimpleThreadPool allows you to start up a fixed number of threads, 138 // DelegateSimpleThreadPool allows you to start up a fixed number of threads,
138 // and then add jobs which will be dispatched to the threads. This is 139 // and then add jobs which will be dispatched to the threads. This is
139 // convenient when you have a lot of small work that you want done 140 // convenient when you have a lot of small work that you want done
140 // multi-threaded, but don't want to spawn a thread for each small bit of work. 141 // multi-threaded, but don't want to spawn a thread for each small bit of work.
141 // 142 //
142 // You just call AddWork() to add a delegate to the list of work to be done. 143 // You just call AddWork() to add a delegate to the list of work to be done.
143 // JoinAll() will make sure that all outstanding work is processed, and wait 144 // JoinAll() will make sure that all outstanding work is processed, and wait
144 // for everything to finish. You can reuse a pool, so you can call Start() 145 // for everything to finish. You can reuse a pool, so you can call Start()
145 // again after you've called JoinAll(). 146 // again after you've called JoinAll().
146 class DelegateSimpleThreadPool : public DelegateSimpleThread::Delegate { 147 class BASE_API DelegateSimpleThreadPool
148 : public DelegateSimpleThread::Delegate {
147 public: 149 public:
148 typedef DelegateSimpleThread::Delegate Delegate; 150 typedef DelegateSimpleThread::Delegate Delegate;
149 151
150 DelegateSimpleThreadPool(const std::string& name_prefix, int num_threads); 152 DelegateSimpleThreadPool(const std::string& name_prefix, int num_threads);
151 virtual ~DelegateSimpleThreadPool(); 153 virtual ~DelegateSimpleThreadPool();
152 154
153 // Start up all of the underlying threads, and start processing work if we 155 // Start up all of the underlying threads, and start processing work if we
154 // have any. 156 // have any.
155 void Start(); 157 void Start();
156 158
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173 int num_threads_; 175 int num_threads_;
174 std::vector<DelegateSimpleThread*> threads_; 176 std::vector<DelegateSimpleThread*> threads_;
175 std::queue<Delegate*> delegates_; 177 std::queue<Delegate*> delegates_;
176 base::Lock lock_; // Locks delegates_ 178 base::Lock lock_; // Locks delegates_
177 WaitableEvent dry_; // Not signaled when there is no work to do. 179 WaitableEvent dry_; // Not signaled when there is no work to do.
178 }; 180 };
179 181
180 } // namespace base 182 } // namespace base
181 183
182 #endif // BASE_THREADING_SIMPLE_THREAD_H_ 184 #endif // BASE_THREADING_SIMPLE_THREAD_H_
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