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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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_MESSAGE_LOOP_MESSAGE_PUMP_LIBEVENT_H_ | 5 #ifndef BASE_MESSAGE_LOOP_MESSAGE_PUMP_LIBEVENT_H_ |
6 #define BASE_MESSAGE_LOOP_MESSAGE_PUMP_LIBEVENT_H_ | 6 #define BASE_MESSAGE_LOOP_MESSAGE_PUMP_LIBEVENT_H_ |
7 | 7 |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "base/compiler_specific.h" | 9 #include "base/compiler_specific.h" |
10 #include "base/memory/weak_ptr.h" | 10 #include "base/memory/weak_ptr.h" |
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91 DISALLOW_COPY_AND_ASSIGN(FileDescriptorWatcher); | 91 DISALLOW_COPY_AND_ASSIGN(FileDescriptorWatcher); |
92 }; | 92 }; |
93 | 93 |
94 enum Mode { | 94 enum Mode { |
95 WATCH_READ = 1 << 0, | 95 WATCH_READ = 1 << 0, |
96 WATCH_WRITE = 1 << 1, | 96 WATCH_WRITE = 1 << 1, |
97 WATCH_READ_WRITE = WATCH_READ | WATCH_WRITE | 97 WATCH_READ_WRITE = WATCH_READ | WATCH_WRITE |
98 }; | 98 }; |
99 | 99 |
100 MessagePumpLibevent(); | 100 MessagePumpLibevent(); |
| 101 virtual ~MessagePumpLibevent(); |
101 | 102 |
102 // Have the current thread's message loop watch for a a situation in which | 103 // Have the current thread's message loop watch for a a situation in which |
103 // reading/writing to the FD can be performed without blocking. | 104 // reading/writing to the FD can be performed without blocking. |
104 // Callers must provide a preallocated FileDescriptorWatcher object which | 105 // Callers must provide a preallocated FileDescriptorWatcher object which |
105 // can later be used to manage the lifetime of this event. | 106 // can later be used to manage the lifetime of this event. |
106 // If a FileDescriptorWatcher is passed in which is already attached to | 107 // If a FileDescriptorWatcher is passed in which is already attached to |
107 // an event, then the effect is cumulative i.e. after the call |controller| | 108 // an event, then the effect is cumulative i.e. after the call |controller| |
108 // will watch both the previous event and the new one. | 109 // will watch both the previous event and the new one. |
109 // If an error occurs while calling this method in a cumulative fashion, the | 110 // If an error occurs while calling this method in a cumulative fashion, the |
110 // event previously attached to |controller| is aborted. | 111 // event previously attached to |controller| is aborted. |
111 // Returns true on success. | 112 // Returns true on success. |
112 // Must be called on the same thread the message_pump is running on. | 113 // Must be called on the same thread the message_pump is running on. |
113 // TODO(dkegel): switch to edge-triggered readiness notification | 114 // TODO(dkegel): switch to edge-triggered readiness notification |
114 bool WatchFileDescriptor(int fd, | 115 bool WatchFileDescriptor(int fd, |
115 bool persistent, | 116 bool persistent, |
116 int mode, | 117 int mode, |
117 FileDescriptorWatcher *controller, | 118 FileDescriptorWatcher *controller, |
118 Watcher *delegate); | 119 Watcher *delegate); |
119 | 120 |
120 void AddIOObserver(IOObserver* obs); | 121 void AddIOObserver(IOObserver* obs); |
121 void RemoveIOObserver(IOObserver* obs); | 122 void RemoveIOObserver(IOObserver* obs); |
122 | 123 |
123 // MessagePump methods: | 124 // MessagePump methods: |
124 virtual void Run(Delegate* delegate) OVERRIDE; | 125 virtual void Run(Delegate* delegate) OVERRIDE; |
125 virtual void Quit() OVERRIDE; | 126 virtual void Quit() OVERRIDE; |
126 virtual void ScheduleWork() OVERRIDE; | 127 virtual void ScheduleWork() OVERRIDE; |
127 virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time) OVERRIDE; | 128 virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time) OVERRIDE; |
128 | 129 |
129 protected: | |
130 virtual ~MessagePumpLibevent(); | |
131 | |
132 private: | 130 private: |
133 friend class MessagePumpLibeventTest; | 131 friend class MessagePumpLibeventTest; |
134 | 132 |
135 void WillProcessIOEvent(); | 133 void WillProcessIOEvent(); |
136 void DidProcessIOEvent(); | 134 void DidProcessIOEvent(); |
137 | 135 |
138 // Risky part of constructor. Returns true on success. | 136 // Risky part of constructor. Returns true on success. |
139 bool Init(); | 137 bool Init(); |
140 | 138 |
141 // Called by libevent to tell us a registered FD can be read/written to. | 139 // Called by libevent to tell us a registered FD can be read/written to. |
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170 event* wakeup_event_; | 168 event* wakeup_event_; |
171 | 169 |
172 ObserverList<IOObserver> io_observers_; | 170 ObserverList<IOObserver> io_observers_; |
173 ThreadChecker watch_file_descriptor_caller_checker_; | 171 ThreadChecker watch_file_descriptor_caller_checker_; |
174 DISALLOW_COPY_AND_ASSIGN(MessagePumpLibevent); | 172 DISALLOW_COPY_AND_ASSIGN(MessagePumpLibevent); |
175 }; | 173 }; |
176 | 174 |
177 } // namespace base | 175 } // namespace base |
178 | 176 |
179 #endif // BASE_MESSAGE_LOOP_MESSAGE_PUMP_LIBEVENT_H_ | 177 #endif // BASE_MESSAGE_LOOP_MESSAGE_PUMP_LIBEVENT_H_ |
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