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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 MOJO_SYSTEM_WAITER_H_ | 5 #ifndef MOJO_SYSTEM_WAITER_H_ |
| 6 #define MOJO_SYSTEM_WAITER_H_ | 6 #define MOJO_SYSTEM_WAITER_H_ |
| 7 | 7 |
| 8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
| 9 #include "base/synchronization/condition_variable.h" | 9 #include "base/synchronization/condition_variable.h" |
| 10 #include "base/synchronization/lock.h" | 10 #include "base/synchronization/lock.h" |
| 11 #include "mojo/public/system/core.h" | 11 #include "mojo/public/system/core.h" |
| 12 #include "mojo/public/system/system_export.h" |
| 12 | 13 |
| 13 namespace mojo { | 14 namespace mojo { |
| 14 namespace system { | 15 namespace system { |
| 15 | 16 |
| 16 // IMPORTANT (all-caps gets your attention, right?): |Waiter| methods are called | 17 // IMPORTANT (all-caps gets your attention, right?): |Waiter| methods are called |
| 17 // under other locks, in particular, |Dispatcher::lock_|s, so |Waiter| methods | 18 // under other locks, in particular, |Dispatcher::lock_|s, so |Waiter| methods |
| 18 // must never call out to other objects (in particular, |Dispatcher|s). This | 19 // must never call out to other objects (in particular, |Dispatcher|s). This |
| 19 // class is thread-safe. | 20 // class is thread-safe. |
| 20 class Waiter { | 21 class MOJO_SYSTEM_EXPORT Waiter { |
| 21 public: | 22 public: |
| 22 Waiter(); | 23 Waiter(); |
| 23 ~Waiter(); | 24 ~Waiter(); |
| 24 | 25 |
| 25 // A |Waiter| can be used multiple times; |Init()| should be called before | 26 // A |Waiter| can be used multiple times; |Init()| should be called before |
| 26 // each time it's used. | 27 // each time it's used. |
| 27 void Init(); | 28 void Init(); |
| 28 | 29 |
| 29 // Waits until a suitable |Awake()| is called. | 30 // Waits until a suitable |Awake()| is called. |
| 30 // Returns: | 31 // Returns: |
| (...skipping 17 matching lines...) Expand all Loading... |
| 48 bool awoken_; | 49 bool awoken_; |
| 49 MojoResult wait_result_; | 50 MojoResult wait_result_; |
| 50 | 51 |
| 51 DISALLOW_COPY_AND_ASSIGN(Waiter); | 52 DISALLOW_COPY_AND_ASSIGN(Waiter); |
| 52 }; | 53 }; |
| 53 | 54 |
| 54 } // namespace system | 55 } // namespace system |
| 55 } // namespace mojo | 56 } // namespace mojo |
| 56 | 57 |
| 57 #endif // MOJO_SYSTEM_WAITER_H_ | 58 #endif // MOJO_SYSTEM_WAITER_H_ |
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