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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_COMMON_HANDLE_WATCHER_H_ | 5 #ifndef MOJO_COMMON_HANDLE_WATCHER_H_ |
6 #define MOJO_COMMON_HANDLE_WATCHER_H_ | 6 #define MOJO_COMMON_HANDLE_WATCHER_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "base/callback_forward.h" | 9 #include "base/callback_forward.h" |
10 #include "base/memory/scoped_ptr.h" | 10 #include "base/memory/scoped_ptr.h" |
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30 ~HandleWatcher(); | 30 ~HandleWatcher(); |
31 | 31 |
32 // Starts listening for |handle|. This implicitly invokes Stop(). In other | 32 // Starts listening for |handle|. This implicitly invokes Stop(). In other |
33 // words, Start() performs one asynchronous watch at a time. It is ok to call | 33 // words, Start() performs one asynchronous watch at a time. It is ok to call |
34 // Start() multiple times, but it cancels any existing watches. |callback| is | 34 // Start() multiple times, but it cancels any existing watches. |callback| is |
35 // notified when the handle is ready, invalid or deadline has passed and is | 35 // notified when the handle is ready, invalid or deadline has passed and is |
36 // notified on the thread Start() was invoked on. If the current thread exits | 36 // notified on the thread Start() was invoked on. If the current thread exits |
37 // before the handle is ready, then |callback| is invoked with a result of | 37 // before the handle is ready, then |callback| is invoked with a result of |
38 // MOJO_RESULT_ABORTED. | 38 // MOJO_RESULT_ABORTED. |
39 void Start(const Handle& handle, | 39 void Start(const Handle& handle, |
40 MojoWaitFlags wait_flags, | 40 MojoHandleSignals handle_signals, |
41 MojoDeadline deadline, | 41 MojoDeadline deadline, |
42 const base::Callback<void(MojoResult)>& callback); | 42 const base::Callback<void(MojoResult)>& callback); |
43 | 43 |
44 // Stops listening. Does nothing if not in the process of listening. | 44 // Stops listening. Does nothing if not in the process of listening. |
45 void Stop(); | 45 void Stop(); |
46 | 46 |
47 private: | 47 private: |
48 class State; | 48 class State; |
49 | 49 |
50 // If non-NULL Start() has been invoked. | 50 // If non-NULL Start() has been invoked. |
51 scoped_ptr<State> state_; | 51 scoped_ptr<State> state_; |
52 | 52 |
53 DISALLOW_COPY_AND_ASSIGN(HandleWatcher); | 53 DISALLOW_COPY_AND_ASSIGN(HandleWatcher); |
54 }; | 54 }; |
55 | 55 |
56 } // namespace common | 56 } // namespace common |
57 } // namespace mojo | 57 } // namespace mojo |
58 | 58 |
59 #endif // MOJO_COMMON_HANDLE_WATCHER_H_ | 59 #endif // MOJO_COMMON_HANDLE_WATCHER_H_ |
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