src/base/message_pump_mac.mm - chromium/src - Git at Google

 // Copyright (c) 2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.

 #include "base/message_pump_mac.h"

 #import <AppKit/AppKit.h>
 #import <Foundation/Foundation.h>
 #include <float.h>

 #include "base/scoped_nsautorelease_pool.h"

 namespace {

 void NoOp(void* info) {
 }

 }  // namespace

 namespace base {

 // Must be called on the run loop thread.
 MessagePumpCFRunLoopBase::MessagePumpCFRunLoopBase()
     : delegate_(NULL) {
   run_loop_ = CFRunLoopGetCurrent();
   CFRetain(run_loop_);

   // Set a repeating timer with a preposterous firing time and interval.  The
   // timer will effectively never fire as-is.  The firing time will be adjusted
   // as needed when ScheduleDelayedWork is called.
   CFRunLoopTimerContext timer_context = CFRunLoopTimerContext();
   timer_context.info = this;
   delayed_work_timer_ = CFRunLoopTimerCreate(NULL,     // allocator
                                              DBL_MAX,  // fire time
                                              DBL_MAX,  // interval
                                              0,        // flags (ignored)
                                              0,        // priority (ignored)
                                              RunDelayedWorkTimer,
                                              &timer_context);
   CFRunLoopAddTimer(run_loop_, delayed_work_timer_, kCFRunLoopCommonModes);

   CFRunLoopSourceContext source_context = CFRunLoopSourceContext();
   source_context.info = this;
   source_context.perform = RunWork;
   work_source_ = CFRunLoopSourceCreate(NULL,  // allocator
                                        0,     // priority
                                        &source_context);
   CFRunLoopAddSource(run_loop_, work_source_, kCFRunLoopCommonModes);

   source_context.perform = RunDelayedWork;
   delayed_work_source_ = CFRunLoopSourceCreate(NULL,  // allocator
                                                1,     // priority
                                                &source_context);
   CFRunLoopAddSource(run_loop_, delayed_work_source_, kCFRunLoopCommonModes);

   CFRunLoopObserverContext observer_context = CFRunLoopObserverContext();
   observer_context.info = this;
   idle_work_observer_ = CFRunLoopObserverCreate(NULL,  // allocator
                                                 kCFRunLoopBeforeWaiting,
                                                 true,  // repeat
                                                 0,     // priority
                                                 RunIdleWork,
                                                 &observer_context);
   CFRunLoopAddObserver(run_loop_, idle_work_observer_, kCFRunLoopCommonModes);
 }

 // Ideally called on the run loop thread.
 MessagePumpCFRunLoopBase::~MessagePumpCFRunLoopBase() {
   CFRunLoopRemoveObserver(run_loop_, idle_work_observer_,
                           kCFRunLoopCommonModes);
   CFRelease(idle_work_observer_);

   CFRunLoopRemoveSource(run_loop_, delayed_work_source_, kCFRunLoopCommonModes);
   CFRelease(delayed_work_source_);

   CFRunLoopRemoveSource(run_loop_, work_source_, kCFRunLoopCommonModes);
   CFRelease(work_source_);

   CFRunLoopRemoveTimer(run_loop_, delayed_work_timer_, kCFRunLoopCommonModes);
   CFRelease(delayed_work_timer_);

   CFRelease(run_loop_);
 }

 // Must be called on the run loop thread.
 void MessagePumpCFRunLoopBase::Run(Delegate* delegate) {
   Delegate* last_delegate = delegate_;
   delegate_ = delegate;

   DoRun(delegate);

   delegate_ = last_delegate;
 }

 // May be called on any thread.
 void MessagePumpCFRunLoopBase::ScheduleWork() {
   CFRunLoopSourceSignal(work_source_);
   CFRunLoopWakeUp(run_loop_);
 }

 // Must be called on the run loop thread.
 void MessagePumpCFRunLoopBase::ScheduleDelayedWork(
     const Time& delayed_work_time) {
   Time::Exploded exploded;
   delayed_work_time.UTCExplode(&exploded);
   double seconds = exploded.second +
                    (static_cast<double>((delayed_work_time.ToInternalValue()) %
                                         Time::kMicrosecondsPerSecond) /
                     Time::kMicrosecondsPerSecond);
   CFGregorianDate gregorian = {
     exploded.year,
     exploded.month,
     exploded.day_of_month,
     exploded.hour,
     exploded.minute,
     seconds
   };
   CFAbsoluteTime fire_time = CFGregorianDateGetAbsoluteTime(gregorian, NULL);

   CFRunLoopTimerSetNextFireDate(delayed_work_timer_, fire_time);
 }

 // Called from the run loop.
 // static
 void MessagePumpCFRunLoopBase::RunDelayedWorkTimer(CFRunLoopTimerRef timer,
                                                    void* info) {
   MessagePumpCFRunLoop* self = static_cast<MessagePumpCFRunLoop*>(info);

   // CFRunLoopTimers fire outside of the priority scheme for CFRunLoopSources.
   // In order to establish the proper priority where delegate_->DoDelayedWork
   // can only be called if delegate_->DoWork returns false, the timer used
   // to schedule delayed work must signal a CFRunLoopSource set at a lower
   // priority than the one used for delegate_->DoWork.
   CFRunLoopSourceSignal(self->delayed_work_source_);
 }

 // Called from the run loop.
 // static
 void MessagePumpCFRunLoopBase::RunWork(void* info) {
   MessagePumpCFRunLoop* self = static_cast<MessagePumpCFRunLoop*>(info);

   // Call DoWork once, and if something was done, arrange to come back here
   // again as long as the loop is still running.
   if (self->delegate_->DoWork()) {
     CFRunLoopSourceSignal(self->work_source_);
   }
 }

 // Called from the run loop.
 // static
 void MessagePumpCFRunLoopBase::RunDelayedWork(void* info) {
   MessagePumpCFRunLoop* self = static_cast<MessagePumpCFRunLoop*>(info);

   Time next_time;
   self->delegate_->DoDelayedWork(&next_time);
   if (!next_time.is_null()) {
     TimeDelta delay = next_time - Time::Now();
     if (delay > TimeDelta()) {
       // There's more delayed work to be done in the future.
       self->ScheduleDelayedWork(next_time);
     } else {
       // There's more delayed work to be done, and its time is in the past.
       // Arrange to come back here directly as long as the loop is still
       // running.
       CFRunLoopSourceSignal(self->delayed_work_source_);
     }
   }
 }

 // Called from the run loop.
 // static
 void MessagePumpCFRunLoopBase::RunIdleWork(CFRunLoopObserverRef observer,
                                            CFRunLoopActivity activity,
                                            void* info) {
   MessagePumpCFRunLoop* self = static_cast<MessagePumpCFRunLoop*>(info);

   if (self->delegate_->DoIdleWork()) {
     // If idle work was done, don't let the loop go to sleep.  More idle work
     // might be waiting.
     CFRunLoopWakeUp(self->run_loop_);
   }
 }

 // Must be called on the run loop thread.
 MessagePumpCFRunLoop::MessagePumpCFRunLoop()
     : nesting_level_(0),
       innermost_quittable_(0),
       quit_pending_(false) {
   CFRunLoopObserverContext observer_context = CFRunLoopObserverContext();
   observer_context.info = this;
   enter_exit_observer_ = CFRunLoopObserverCreate(NULL,  // allocator
                                                  kCFRunLoopEntry |
                                                      kCFRunLoopExit,
                                                  true,  // repeat
                                                  0,     // priority
                                                  EnterExitRunLoop,
                                                  &observer_context);
   CFRunLoopAddObserver(run_loop_, enter_exit_observer_, kCFRunLoopCommonModes);
 }

 // Ideally called on the run loop thread.  If other CFRunLoopRun loops were
 // running lower on the run loop thread's stack when this object was created,
 // the same number of CFRunLoopRun loops must be running when this object is
 // destroyed.
 MessagePumpCFRunLoop::~MessagePumpCFRunLoop() {
   CFRunLoopRemoveObserver(run_loop_, enter_exit_observer_,
                           kCFRunLoopCommonModes);
   CFRelease(enter_exit_observer_);
 }

 // Called by CFRunLoopBase::DoRun.  If other CFRunLoopRun loops were running
 // lower on the run loop thread's stack when this object was created, the same
 // number of CFRunLoopRun loops must be running for the outermost call to Run.
 // Run/DoRun are reentrant after that point.
 void MessagePumpCFRunLoop::DoRun(Delegate* delegate) {
   // nesting_level_ will be incremented in EnterExitRunLoop, so set
   // innermost_quittable_ accordingly.
   int last_innermost_quittable = innermost_quittable_;
   innermost_quittable_ = nesting_level_ + 1;

   // This is completely identical to calling CFRunLoopRun(), except autorelease
   // pool management is introduced.
   int result;
   do {
     ScopedNSAutoreleasePool autorelease_pool;
     result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, DBL_MAX, false);
   } while (result != kCFRunLoopRunStopped && result != kCFRunLoopRunFinished);

   // Restore the previous state of the object.
   innermost_quittable_ = last_innermost_quittable;
 }

 // Must be called on the run loop thread.
 void MessagePumpCFRunLoop::Quit() {
   // Stop the innermost run loop managed by this MessagePumpCFRunLoop object.
   if (nesting_level_ == innermost_quittable_) {
     // This object is running the innermost loop, just stop it.
     CFRunLoopStop(run_loop_);
   } else {
     // There's another loop running inside the loop managed by this object.
     // In other words, someone else called CFRunLoopRun on the same thread,
     // higher on the stack than our highest Run call.  Don't preempt other
     // run loops, just mark the object to quit our innermost run loop as soon
     // as the other inner loops we don't manage are done.
     quit_pending_ = true;
   }
 }

 // Called from the run loop.
 // static
 void MessagePumpCFRunLoop::EnterExitRunLoop(CFRunLoopObserverRef observer,
                                             CFRunLoopActivity activity,
                                             void* info) {
   MessagePumpCFRunLoop* self = static_cast<MessagePumpCFRunLoop*>(info);

   switch (activity) {
     case kCFRunLoopEntry:
       // If the run loop was entered by a call to Run, this will properly
       // balance the decrement done in Run before entering the loop.
       ++self->nesting_level_;
       break;
     case kCFRunLoopExit:
       if (--self->nesting_level_ == self->innermost_quittable_ &&
           self->quit_pending_) {
         // Quit was called while loops other than those managed by this object
         // were running further inside a run loop managed by this object.  Now
         // that all unmanaged inner run loops are gone, stop the loop running
         // just inside Run.
         CFRunLoopStop(self->run_loop_);
         self->quit_pending_ = false;
       }
       break;
     default:
       break;
   }
 }

 MessagePumpNSRunLoop::MessagePumpNSRunLoop()
     : keep_running_(true) {
   CFRunLoopSourceContext source_context = CFRunLoopSourceContext();
   source_context.perform = NoOp;
   quit_source_ = CFRunLoopSourceCreate(NULL,  // allocator
                                        0,     // priority
                                        &source_context);
   CFRunLoopAddSource(run_loop_, quit_source_, kCFRunLoopCommonModes);
 }

 MessagePumpNSRunLoop::~MessagePumpNSRunLoop() {
   CFRunLoopRemoveSource(run_loop_, quit_source_, kCFRunLoopCommonModes);
   CFRelease(quit_source_);
 }

 void MessagePumpNSRunLoop::DoRun(Delegate* delegate) {
   while (keep_running_) {
     // NSRunLoop manages autorelease pools itself.
     [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode
                              beforeDate:[NSDate distantFuture]];
   }

   keep_running_ = true;
 }

 void MessagePumpNSRunLoop::Quit() {
   keep_running_ = false;
   CFRunLoopSourceSignal(quit_source_);
   CFRunLoopWakeUp(run_loop_);
 }

 MessagePumpNSApplication::MessagePumpNSApplication()
     : keep_running_(true),
       running_own_loop_(false) {
 }

 void MessagePumpNSApplication::DoRun(Delegate* delegate) {
   bool last_running_own_loop_ = running_own_loop_;

   [NSApplication sharedApplication];

   if (![NSApp isRunning]) {
     running_own_loop_ = false;
     // NSApplication manages autorelease pools itself when run this way.
     [NSApp run];
   } else {
     running_own_loop_ = true;
     while (keep_running_) {
       ScopedNSAutoreleasePool autorelease_pool;
       NSEvent* event = [NSApp nextEventMatchingMask:NSAnyEventMask
                                           untilDate:[NSDate distantFuture]
                                              inMode:NSDefaultRunLoopMode
                                             dequeue:YES];
       if (event) {
         [NSApp sendEvent:event];
       }
     }
     keep_running_ = true;
   }

   running_own_loop_ = last_running_own_loop_;
 }

 void MessagePumpNSApplication::Quit() {
   if (!running_own_loop_) {
     [NSApp stop:nil];
   } else {
     keep_running_ = false;
   }

   // Send a fake event to wake the loop up.
   [NSApp postEvent:[NSEvent otherEventWithType:NSApplicationDefined
                                       location:NSMakePoint(0,0)
                                  modifierFlags:0
                                      timestamp:0
                                   windowNumber:0
                                        context:NULL
                                        subtype:0
                                          data1:0
                                          data2:0]
            atStart:NO];
 }

 // static
 MessagePump* MessagePumpMac::Create() {
   if ([NSThread isMainThread]) {
     return new MessagePumpNSApplication;
   }

   return new MessagePumpNSRunLoop;
 }

 }  // namespace base
	// Copyright (c) 2008 The Chromium Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style license that can be
	// found in the LICENSE file.

	#include "base/message_pump_mac.h"

	#import <AppKit/AppKit.h>
	#import <Foundation/Foundation.h>
	#include <float.h>

	#include "base/scoped_nsautorelease_pool.h"

	namespace {

	void NoOp(void* info) {
	}

	} // namespace

	namespace base {

	// Must be called on the run loop thread.
	MessagePumpCFRunLoopBase::MessagePumpCFRunLoopBase()
	: delegate_(NULL) {
	run_loop_ = CFRunLoopGetCurrent();
	CFRetain(run_loop_);

	// Set a repeating timer with a preposterous firing time and interval. The
	// timer will effectively never fire as-is. The firing time will be adjusted
	// as needed when ScheduleDelayedWork is called.
	CFRunLoopTimerContext timer_context = CFRunLoopTimerContext();
	timer_context.info = this;
	delayed_work_timer_ = CFRunLoopTimerCreate(NULL, // allocator
	DBL_MAX, // fire time
	DBL_MAX, // interval
	0, // flags (ignored)
	0, // priority (ignored)
	RunDelayedWorkTimer,
	&timer_context);
	CFRunLoopAddTimer(run_loop_, delayed_work_timer_, kCFRunLoopCommonModes);

	CFRunLoopSourceContext source_context = CFRunLoopSourceContext();
	source_context.info = this;
	source_context.perform = RunWork;
	work_source_ = CFRunLoopSourceCreate(NULL, // allocator
	0, // priority
	&source_context);
	CFRunLoopAddSource(run_loop_, work_source_, kCFRunLoopCommonModes);

	source_context.perform = RunDelayedWork;
	delayed_work_source_ = CFRunLoopSourceCreate(NULL, // allocator
	1, // priority
	&source_context);
	CFRunLoopAddSource(run_loop_, delayed_work_source_, kCFRunLoopCommonModes);

	CFRunLoopObserverContext observer_context = CFRunLoopObserverContext();
	observer_context.info = this;
	idle_work_observer_ = CFRunLoopObserverCreate(NULL, // allocator
	kCFRunLoopBeforeWaiting,
	true, // repeat
	0, // priority
	RunIdleWork,
	&observer_context);
	CFRunLoopAddObserver(run_loop_, idle_work_observer_, kCFRunLoopCommonModes);
	}

	// Ideally called on the run loop thread.
	MessagePumpCFRunLoopBase::~MessagePumpCFRunLoopBase() {
	CFRunLoopRemoveObserver(run_loop_, idle_work_observer_,
	kCFRunLoopCommonModes);
	CFRelease(idle_work_observer_);

	CFRunLoopRemoveSource(run_loop_, delayed_work_source_, kCFRunLoopCommonModes);
	CFRelease(delayed_work_source_);

	CFRunLoopRemoveSource(run_loop_, work_source_, kCFRunLoopCommonModes);
	CFRelease(work_source_);

	CFRunLoopRemoveTimer(run_loop_, delayed_work_timer_, kCFRunLoopCommonModes);
	CFRelease(delayed_work_timer_);

	CFRelease(run_loop_);
	}

	// Must be called on the run loop thread.
	void MessagePumpCFRunLoopBase::Run(Delegate* delegate) {
	Delegate* last_delegate = delegate_;
	delegate_ = delegate;

	DoRun(delegate);

	delegate_ = last_delegate;
	}

	// May be called on any thread.
	void MessagePumpCFRunLoopBase::ScheduleWork() {
	CFRunLoopSourceSignal(work_source_);
	CFRunLoopWakeUp(run_loop_);
	}

	// Must be called on the run loop thread.
	void MessagePumpCFRunLoopBase::ScheduleDelayedWork(
	const Time& delayed_work_time) {
	Time::Exploded exploded;
	delayed_work_time.UTCExplode(&exploded);
	double seconds = exploded.second +
	(static_cast<double>((delayed_work_time.ToInternalValue()) %
	Time::kMicrosecondsPerSecond) /
	Time::kMicrosecondsPerSecond);
	CFGregorianDate gregorian = {
	exploded.year,
	exploded.month,
	exploded.day_of_month,
	exploded.hour,
	exploded.minute,
	seconds
	};
	CFAbsoluteTime fire_time = CFGregorianDateGetAbsoluteTime(gregorian, NULL);

	CFRunLoopTimerSetNextFireDate(delayed_work_timer_, fire_time);
	}

	// Called from the run loop.
	// static
	void MessagePumpCFRunLoopBase::RunDelayedWorkTimer(CFRunLoopTimerRef timer,
	void* info) {
	MessagePumpCFRunLoop* self = static_cast<MessagePumpCFRunLoop*>(info);

	// CFRunLoopTimers fire outside of the priority scheme for CFRunLoopSources.
	// In order to establish the proper priority where delegate_->DoDelayedWork
	// can only be called if delegate_->DoWork returns false, the timer used
	// to schedule delayed work must signal a CFRunLoopSource set at a lower
	// priority than the one used for delegate_->DoWork.
	CFRunLoopSourceSignal(self->delayed_work_source_);
	}

	// Called from the run loop.
	// static
	void MessagePumpCFRunLoopBase::RunWork(void* info) {
	MessagePumpCFRunLoop* self = static_cast<MessagePumpCFRunLoop*>(info);

	// Call DoWork once, and if something was done, arrange to come back here
	// again as long as the loop is still running.
	if (self->delegate_->DoWork()) {
	CFRunLoopSourceSignal(self->work_source_);
	}
	}

	// Called from the run loop.
	// static
	void MessagePumpCFRunLoopBase::RunDelayedWork(void* info) {
	MessagePumpCFRunLoop* self = static_cast<MessagePumpCFRunLoop*>(info);

	Time next_time;
	self->delegate_->DoDelayedWork(&next_time);
	if (!next_time.is_null()) {
	TimeDelta delay = next_time - Time::Now();
	if (delay > TimeDelta()) {
	// There's more delayed work to be done in the future.
	self->ScheduleDelayedWork(next_time);
	} else {
	// There's more delayed work to be done, and its time is in the past.
	// Arrange to come back here directly as long as the loop is still
	// running.
	CFRunLoopSourceSignal(self->delayed_work_source_);
	}
	}
	}

	// Called from the run loop.
	// static
	void MessagePumpCFRunLoopBase::RunIdleWork(CFRunLoopObserverRef observer,
	CFRunLoopActivity activity,
	void* info) {
	MessagePumpCFRunLoop* self = static_cast<MessagePumpCFRunLoop*>(info);

	if (self->delegate_->DoIdleWork()) {
	// If idle work was done, don't let the loop go to sleep. More idle work
	// might be waiting.
	CFRunLoopWakeUp(self->run_loop_);
	}
	}

	// Must be called on the run loop thread.
	MessagePumpCFRunLoop::MessagePumpCFRunLoop()
	: nesting_level_(0),
	innermost_quittable_(0),
	quit_pending_(false) {
	CFRunLoopObserverContext observer_context = CFRunLoopObserverContext();
	observer_context.info = this;
	enter_exit_observer_ = CFRunLoopObserverCreate(NULL, // allocator
	kCFRunLoopEntry \|
	kCFRunLoopExit,
	true, // repeat
	0, // priority
	EnterExitRunLoop,
	&observer_context);
	CFRunLoopAddObserver(run_loop_, enter_exit_observer_, kCFRunLoopCommonModes);
	}

	// Ideally called on the run loop thread. If other CFRunLoopRun loops were
	// running lower on the run loop thread's stack when this object was created,
	// the same number of CFRunLoopRun loops must be running when this object is
	// destroyed.
	MessagePumpCFRunLoop::~MessagePumpCFRunLoop() {
	CFRunLoopRemoveObserver(run_loop_, enter_exit_observer_,
	kCFRunLoopCommonModes);
	CFRelease(enter_exit_observer_);
	}

	// Called by CFRunLoopBase::DoRun. If other CFRunLoopRun loops were running
	// lower on the run loop thread's stack when this object was created, the same
	// number of CFRunLoopRun loops must be running for the outermost call to Run.
	// Run/DoRun are reentrant after that point.
	void MessagePumpCFRunLoop::DoRun(Delegate* delegate) {
	// nesting_level_ will be incremented in EnterExitRunLoop, so set
	// innermost_quittable_ accordingly.
	int last_innermost_quittable = innermost_quittable_;
	innermost_quittable_ = nesting_level_ + 1;

	// This is completely identical to calling CFRunLoopRun(), except autorelease
	// pool management is introduced.
	int result;
	do {
	ScopedNSAutoreleasePool autorelease_pool;
	result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, DBL_MAX, false);
	} while (result != kCFRunLoopRunStopped && result != kCFRunLoopRunFinished);

	// Restore the previous state of the object.
	innermost_quittable_ = last_innermost_quittable;
	}

	// Must be called on the run loop thread.
	void MessagePumpCFRunLoop::Quit() {
	// Stop the innermost run loop managed by this MessagePumpCFRunLoop object.
	if (nesting_level_ == innermost_quittable_) {
	// This object is running the innermost loop, just stop it.
	CFRunLoopStop(run_loop_);
	} else {
	// There's another loop running inside the loop managed by this object.
	// In other words, someone else called CFRunLoopRun on the same thread,
	// higher on the stack than our highest Run call. Don't preempt other
	// run loops, just mark the object to quit our innermost run loop as soon
	// as the other inner loops we don't manage are done.
	quit_pending_ = true;
	}
	}

	// Called from the run loop.
	// static
	void MessagePumpCFRunLoop::EnterExitRunLoop(CFRunLoopObserverRef observer,
	CFRunLoopActivity activity,
	void* info) {
	MessagePumpCFRunLoop* self = static_cast<MessagePumpCFRunLoop*>(info);

	switch (activity) {
	case kCFRunLoopEntry:
	// If the run loop was entered by a call to Run, this will properly
	// balance the decrement done in Run before entering the loop.
	++self->nesting_level_;
	break;
	case kCFRunLoopExit:
	if (--self->nesting_level_ == self->innermost_quittable_ &&
	self->quit_pending_) {
	// Quit was called while loops other than those managed by this object
	// were running further inside a run loop managed by this object. Now
	// that all unmanaged inner run loops are gone, stop the loop running
	// just inside Run.
	CFRunLoopStop(self->run_loop_);
	self->quit_pending_ = false;
	}
	break;
	default:
	break;
	}
	}

	MessagePumpNSRunLoop::MessagePumpNSRunLoop()
	: keep_running_(true) {
	CFRunLoopSourceContext source_context = CFRunLoopSourceContext();
	source_context.perform = NoOp;
	quit_source_ = CFRunLoopSourceCreate(NULL, // allocator
	0, // priority
	&source_context);
	CFRunLoopAddSource(run_loop_, quit_source_, kCFRunLoopCommonModes);
	}

	MessagePumpNSRunLoop::~MessagePumpNSRunLoop() {
	CFRunLoopRemoveSource(run_loop_, quit_source_, kCFRunLoopCommonModes);
	CFRelease(quit_source_);
	}

	void MessagePumpNSRunLoop::DoRun(Delegate* delegate) {
	while (keep_running_) {
	// NSRunLoop manages autorelease pools itself.
	[[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode
	beforeDate:[NSDate distantFuture]];
	}

	keep_running_ = true;
	}

	void MessagePumpNSRunLoop::Quit() {
	keep_running_ = false;
	CFRunLoopSourceSignal(quit_source_);
	CFRunLoopWakeUp(run_loop_);
	}

	MessagePumpNSApplication::MessagePumpNSApplication()
	: keep_running_(true),
	running_own_loop_(false) {
	}

	void MessagePumpNSApplication::DoRun(Delegate* delegate) {
	bool last_running_own_loop_ = running_own_loop_;

	[NSApplication sharedApplication];

	if (![NSApp isRunning]) {
	running_own_loop_ = false;
	// NSApplication manages autorelease pools itself when run this way.
	[NSApp run];
	} else {
	running_own_loop_ = true;
	while (keep_running_) {
	ScopedNSAutoreleasePool autorelease_pool;
	NSEvent* event = [NSApp nextEventMatchingMask:NSAnyEventMask
	untilDate:[NSDate distantFuture]
	inMode:NSDefaultRunLoopMode
	dequeue:YES];
	if (event) {
	[NSApp sendEvent:event];
	}
	}
	keep_running_ = true;
	}

	running_own_loop_ = last_running_own_loop_;
	}

	void MessagePumpNSApplication::Quit() {
	if (!running_own_loop_) {
	[NSApp stop:nil];
	} else {
	keep_running_ = false;
	}

	// Send a fake event to wake the loop up.
	[NSApp postEvent:[NSEvent otherEventWithType:NSApplicationDefined
	location:NSMakePoint(0,0)
	modifierFlags:0
	timestamp:0
	windowNumber:0
	context:NULL
	subtype:0
	data1:0
	data2:0]
	atStart:NO];
	}

	// static
	MessagePump* MessagePumpMac::Create() {
	if ([NSThread isMainThread]) {
	return new MessagePumpNSApplication;
	}

	return new MessagePumpNSRunLoop;
	}

	} // namespace base