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Side by Side Diff: base/waitable_event.h

Issue 3452030: FBTF: Moves code to the headers. (Closed) Base URL: http://src.chromium.org/git/chromium.git
Patch Set: Created 10 years, 2 months ago
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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2009 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 #ifndef BASE_WAITABLE_EVENT_H_ 5 #ifndef BASE_WAITABLE_EVENT_H_
6 #define BASE_WAITABLE_EVENT_H_ 6 #define BASE_WAITABLE_EVENT_H_
7 #pragma once 7 #pragma once
8 8
9 #include "base/basictypes.h" 9 #include "base/basictypes.h"
10 10
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137 // MSDN documentation says that the resulting behaviour is 'undefined', but 137 // MSDN documentation says that the resulting behaviour is 'undefined', but
138 // it doesn't crash. However, if we were to include the following members 138 // it doesn't crash. However, if we were to include the following members
139 // directly then, on POSIX, one couldn't use WaitableEventWatcher to watch an 139 // directly then, on POSIX, one couldn't use WaitableEventWatcher to watch an
140 // event which gets deleted. This mismatch has bitten us several times now, 140 // event which gets deleted. This mismatch has bitten us several times now,
141 // so we have a kernel of the WaitableEvent, which is reference counted. 141 // so we have a kernel of the WaitableEvent, which is reference counted.
142 // WaitableEventWatchers may then take a reference and thus match the Windows 142 // WaitableEventWatchers may then take a reference and thus match the Windows
143 // behaviour. 143 // behaviour.
144 struct WaitableEventKernel : 144 struct WaitableEventKernel :
145 public RefCountedThreadSafe<WaitableEventKernel> { 145 public RefCountedThreadSafe<WaitableEventKernel> {
146 public: 146 public:
147 WaitableEventKernel(bool manual_reset, bool initially_signaled) 147 WaitableEventKernel(bool manual_reset, bool initially_signaled);
148 : manual_reset_(manual_reset), 148 virtual ~WaitableEventKernel();
149 signaled_(initially_signaled) {
150 }
151 149
152 bool Dequeue(Waiter* waiter, void* tag); 150 bool Dequeue(Waiter* waiter, void* tag);
153 151
154 Lock lock_; 152 Lock lock_;
155 const bool manual_reset_; 153 const bool manual_reset_;
156 bool signaled_; 154 bool signaled_;
157 std::list<Waiter*> waiters_; 155 std::list<Waiter*> waiters_;
158 }; 156 };
159 157
158 struct WaitableEventKernel;
160 scoped_refptr<WaitableEventKernel> kernel_; 159 scoped_refptr<WaitableEventKernel> kernel_;
161 160
162 bool SignalAll(); 161 bool SignalAll();
163 bool SignalOne(); 162 bool SignalOne();
164 void Enqueue(Waiter* waiter); 163 void Enqueue(Waiter* waiter);
165 164
166 // When dealing with arrays of WaitableEvent*, we want to sort by the address 165 // When dealing with arrays of WaitableEvent*, we want to sort by the address
167 // of the WaitableEvent in order to have a globally consistent locking order. 166 // of the WaitableEvent in order to have a globally consistent locking order.
168 // In that case we keep them, in sorted order, in an array of pairs where the 167 // In that case we keep them, in sorted order, in an array of pairs where the
169 // second element is the index of the WaitableEvent in the original, 168 // second element is the index of the WaitableEvent in the original,
170 // unsorted, array. 169 // unsorted, array.
171 typedef std::pair<WaitableEvent*, size_t> WaiterAndIndex; 170 typedef std::pair<WaitableEvent*, size_t> WaiterAndIndex;
172 static size_t EnqueueMany(WaiterAndIndex* waitables, 171 static size_t EnqueueMany(WaiterAndIndex* waitables,
173 size_t count, Waiter* waiter); 172 size_t count, Waiter* waiter);
174 #endif 173 #endif
175 174
176 DISALLOW_COPY_AND_ASSIGN(WaitableEvent); 175 DISALLOW_COPY_AND_ASSIGN(WaitableEvent);
177 }; 176 };
178 177
179 } // namespace base 178 } // namespace base
180 179
181 #endif // BASE_WAITABLE_EVENT_H_ 180 #endif // BASE_WAITABLE_EVENT_H_
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