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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 // The basis for all native run loops on the Mac is the CFRunLoop. It can be | 5 // The basis for all native run loops on the Mac is the CFRunLoop. It can be |
| 6 // used directly, it can be used as the driving force behind the similar | 6 // used directly, it can be used as the driving force behind the similar |
| 7 // Foundation NSRunLoop, and it can be used to implement higher-level event | 7 // Foundation NSRunLoop, and it can be used to implement higher-level event |
| 8 // loops such as the NSApplication event loop. | 8 // loops such as the NSApplication event loop. |
| 9 // | 9 // |
| 10 // This file introduces a basic CFRunLoop-based implementation of the | 10 // This file introduces a basic CFRunLoop-based implementation of the |
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| 58 // Needs access to CreateAutoreleasePool. | 58 // Needs access to CreateAutoreleasePool. |
| 59 friend class MessagePumpScopedAutoreleasePool; | 59 friend class MessagePumpScopedAutoreleasePool; |
| 60 public: | 60 public: |
| 61 MessagePumpCFRunLoopBase(); | 61 MessagePumpCFRunLoopBase(); |
| 62 virtual ~MessagePumpCFRunLoopBase(); | 62 virtual ~MessagePumpCFRunLoopBase(); |
| 63 | 63 |
| 64 // Subclasses should implement the work they need to do in MessagePump::Run | 64 // Subclasses should implement the work they need to do in MessagePump::Run |
| 65 // in the DoRun method. MessagePumpCFRunLoopBase::Run calls DoRun directly. | 65 // in the DoRun method. MessagePumpCFRunLoopBase::Run calls DoRun directly. |
| 66 // This arrangement is used because MessagePumpCFRunLoopBase needs to set | 66 // This arrangement is used because MessagePumpCFRunLoopBase needs to set |
| 67 // up and tear down things before and after the "meat" of DoRun. | 67 // up and tear down things before and after the "meat" of DoRun. |
| 68 virtual void Run(Delegate* delegate); | 68 virtual void Run(Delegate* delegate) OVERRIDE; |
| 69 virtual void DoRun(Delegate* delegate) = 0; | 69 virtual void DoRun(Delegate* delegate) = 0; |
| 70 | 70 |
| 71 virtual void ScheduleWork(); | 71 virtual void ScheduleWork() OVERRIDE; |
| 72 virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time); | 72 virtual void ScheduleDelayedWork(const TimeTicks& delayed_work_time) OVERRIDE; |
| 73 | 73 |
| 74 protected: | 74 protected: |
| 75 // Accessors for private data members to be used by subclasses. | 75 // Accessors for private data members to be used by subclasses. |
| 76 CFRunLoopRef run_loop() const { return run_loop_; } | 76 CFRunLoopRef run_loop() const { return run_loop_; } |
| 77 int nesting_level() const { return nesting_level_; } | 77 int nesting_level() const { return nesting_level_; } |
| 78 int run_nesting_level() const { return run_nesting_level_; } | 78 int run_nesting_level() const { return run_nesting_level_; } |
| 79 | 79 |
| 80 // Return an autorelease pool to wrap around any work being performed. | 80 // Return an autorelease pool to wrap around any work being performed. |
| 81 // In some cases, CreateAutoreleasePool may return nil intentionally to | 81 // In some cases, CreateAutoreleasePool may return nil intentionally to |
| 82 // preventing an autorelease pool from being created, allowing any | 82 // preventing an autorelease pool from being created, allowing any |
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| 184 bool delegateless_work_; | 184 bool delegateless_work_; |
| 185 bool delegateless_idle_work_; | 185 bool delegateless_idle_work_; |
| 186 | 186 |
| 187 DISALLOW_COPY_AND_ASSIGN(MessagePumpCFRunLoopBase); | 187 DISALLOW_COPY_AND_ASSIGN(MessagePumpCFRunLoopBase); |
| 188 }; | 188 }; |
| 189 | 189 |
| 190 class MessagePumpCFRunLoop : public MessagePumpCFRunLoopBase { | 190 class MessagePumpCFRunLoop : public MessagePumpCFRunLoopBase { |
| 191 public: | 191 public: |
| 192 MessagePumpCFRunLoop(); | 192 MessagePumpCFRunLoop(); |
| 193 | 193 |
| 194 virtual void DoRun(Delegate* delegate); | 194 virtual void DoRun(Delegate* delegate) OVERRIDE; |
| 195 virtual void Quit(); | 195 virtual void Quit() OVERRIDE; |
| 196 | 196 |
| 197 private: | 197 private: |
| 198 virtual void EnterExitRunLoop(CFRunLoopActivity activity); | 198 virtual void EnterExitRunLoop(CFRunLoopActivity activity) OVERRIDE; |
| 199 | 199 |
| 200 // True if Quit is called to stop the innermost MessagePump | 200 // True if Quit is called to stop the innermost MessagePump |
| 201 // (innermost_quittable_) but some other CFRunLoopRun loop (nesting_level_) | 201 // (innermost_quittable_) but some other CFRunLoopRun loop (nesting_level_) |
| 202 // is running inside the MessagePump's innermost Run call. | 202 // is running inside the MessagePump's innermost Run call. |
| 203 bool quit_pending_; | 203 bool quit_pending_; |
| 204 | 204 |
| 205 DISALLOW_COPY_AND_ASSIGN(MessagePumpCFRunLoop); | 205 DISALLOW_COPY_AND_ASSIGN(MessagePumpCFRunLoop); |
| 206 }; | 206 }; |
| 207 | 207 |
| 208 class MessagePumpNSRunLoop : public MessagePumpCFRunLoopBase { | 208 class MessagePumpNSRunLoop : public MessagePumpCFRunLoopBase { |
| 209 public: | 209 public: |
| 210 MessagePumpNSRunLoop(); | 210 MessagePumpNSRunLoop(); |
| 211 virtual ~MessagePumpNSRunLoop(); | 211 virtual ~MessagePumpNSRunLoop(); |
| 212 | 212 |
| 213 virtual void DoRun(Delegate* delegate); | 213 virtual void DoRun(Delegate* delegate) OVERRIDE; |
| 214 virtual void Quit(); | 214 virtual void Quit() OVERRIDE; |
| 215 | 215 |
| 216 private: | 216 private: |
| 217 // A source that doesn't do anything but provide something signalable | 217 // A source that doesn't do anything but provide something signalable |
| 218 // attached to the run loop. This source will be signalled when Quit | 218 // attached to the run loop. This source will be signalled when Quit |
| 219 // is called, to cause the loop to wake up so that it can stop. | 219 // is called, to cause the loop to wake up so that it can stop. |
| 220 CFRunLoopSourceRef quit_source_; | 220 CFRunLoopSourceRef quit_source_; |
| 221 | 221 |
| 222 // False after Quit is called. | 222 // False after Quit is called. |
| 223 bool keep_running_; | 223 bool keep_running_; |
| 224 | 224 |
| 225 DISALLOW_COPY_AND_ASSIGN(MessagePumpNSRunLoop); | 225 DISALLOW_COPY_AND_ASSIGN(MessagePumpNSRunLoop); |
| 226 }; | 226 }; |
| 227 | 227 |
| 228 class MessagePumpNSApplication : public MessagePumpCFRunLoopBase { | 228 class MessagePumpNSApplication : public MessagePumpCFRunLoopBase { |
| 229 public: | 229 public: |
| 230 MessagePumpNSApplication(); | 230 MessagePumpNSApplication(); |
| 231 | 231 |
| 232 virtual void DoRun(Delegate* delegate); | 232 virtual void DoRun(Delegate* delegate) OVERRIDE; |
| 233 virtual void Quit(); | 233 virtual void Quit() OVERRIDE; |
| 234 | 234 |
| 235 protected: | 235 protected: |
| 236 // Returns nil if NSApp is currently in the middle of calling -sendEvent. | 236 // Returns nil if NSApp is currently in the middle of calling -sendEvent. |
| 237 virtual NSAutoreleasePool* CreateAutoreleasePool(); | 237 virtual NSAutoreleasePool* CreateAutoreleasePool() OVERRIDE; |
| 238 | 238 |
| 239 private: | 239 private: |
| 240 // False after Quit is called. | 240 // False after Quit is called. |
| 241 bool keep_running_; | 241 bool keep_running_; |
| 242 | 242 |
| 243 // True if DoRun is managing its own run loop as opposed to letting | 243 // True if DoRun is managing its own run loop as opposed to letting |
| 244 // -[NSApplication run] handle it. The outermost run loop in the application | 244 // -[NSApplication run] handle it. The outermost run loop in the application |
| 245 // is managed by -[NSApplication run], inner run loops are handled by a loop | 245 // is managed by -[NSApplication run], inner run loops are handled by a loop |
| 246 // in DoRun. | 246 // in DoRun. |
| 247 bool running_own_loop_; | 247 bool running_own_loop_; |
| 248 | 248 |
| 249 DISALLOW_COPY_AND_ASSIGN(MessagePumpNSApplication); | 249 DISALLOW_COPY_AND_ASSIGN(MessagePumpNSApplication); |
| 250 }; | 250 }; |
| 251 | 251 |
| 252 class MessagePumpMac { | 252 class MessagePumpMac { |
| 253 public: | 253 public: |
| 254 // Returns a new instance of MessagePumpNSApplication if called on the main | 254 // Returns a new instance of MessagePumpNSApplication if called on the main |
| 255 // thread. Otherwise, returns a new instance of MessagePumpNSRunLoop. | 255 // thread. Otherwise, returns a new instance of MessagePumpNSRunLoop. |
| 256 static MessagePump* Create(); | 256 static MessagePump* Create(); |
| 257 | 257 |
| 258 private: | 258 private: |
| 259 DISALLOW_IMPLICIT_CONSTRUCTORS(MessagePumpMac); | 259 DISALLOW_IMPLICIT_CONSTRUCTORS(MessagePumpMac); |
| 260 }; | 260 }; |
| 261 | 261 |
| 262 } // namespace base | 262 } // namespace base |
| 263 | 263 |
| 264 #endif // BASE_MESSAGE_PUMP_MAC_H_ | 264 #endif // BASE_MESSAGE_PUMP_MAC_H_ |
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