C++ CFRunLoopGetCurrent函數代碼示例

void Audio_Queue::init()
{
    OSStatus err = noErr;
    
    cleanup();
        
    // create the audio queue
    err = AudioQueueNewOutput(&m_streamDesc, audioQueueOutputCallback, this, CFRunLoopGetCurrent(), NULL, 0, &m_outAQ);
    if (err) {
        AQ_TRACE("%s: error in AudioQueueNewOutput\n", __PRETTY_FUNCTION__);
        
        m_lastError = err;
        
        if (m_delegate) {
            m_delegate->audioQueueInitializationFailed();
        }
        
        return;
    }
    
    Stream_Configuration *configuration = Stream_Configuration::configuration();
    
    // allocate audio queue buffers
    for (unsigned int i = 0; i < configuration->bufferCount; ++i) {
        err = AudioQueueAllocateBuffer(m_outAQ, configuration->bufferSize, &m_audioQueueBuffer[i]);
        if (err) {
            /* If allocating the buffers failed, everything else will fail, too.
             *  Dispose the queue so that we can later on detect that this
             *  queue in fact has not been initialized.
             */
            
            AQ_TRACE("%s: error in AudioQueueAllocateBuffer\n", __PRETTY_FUNCTION__);
            
            (void)AudioQueueDispose(m_outAQ, true);
            m_outAQ = 0;
            
            m_lastError = err;
            
            if (m_delegate) {
                m_delegate->audioQueueInitializationFailed();
            }
            
            return;
        }
    }
    
    // listen for kAudioQueueProperty_IsRunning
    err = AudioQueueAddPropertyListener(m_outAQ, kAudioQueueProperty_IsRunning, audioQueueIsRunningCallback, this);
    if (err) {
        AQ_TRACE("%s: error in AudioQueueAddPropertyListener\n", __PRETTY_FUNCTION__);
        m_lastError = err;
        return;
    }
    
    if (configuration->enableTimeAndPitchConversion) {
        UInt32 enableTimePitchConversion = 1;
        
        err = AudioQueueSetProperty (m_outAQ, kAudioQueueProperty_EnableTimePitch, &enableTimePitchConversion, sizeof(enableTimePitchConversion));
        if (err != noErr) {
            AQ_TRACE("Failed to enable time and pitch conversion. Play rate setting will fail\n");
        }
    }
    
    if (m_initialOutputVolume != 1.0) {
        setVolume(m_initialOutputVolume);
    }
}

void btpad_packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size)
{
   bd_addr_t event_addr;

   if (packet_type == HCI_EVENT_PACKET)
   {
      switch (packet[0])
      {
         case BTSTACK_EVENT_STATE:
         {
            RARCH_LOG("BTstack: HCI State %d\n", packet[2]);
         
            switch (packet[2])
            {                  
               case HCI_STATE_WORKING:
                  btpad_queue_reset();

                  btpad_queue_hci_read_bd_addr();
                  bt_send_cmd_ptr(l2cap_register_service_ptr, PSM_HID_CONTROL, 672);  // TODO: Where did I get 672 for mtu?
                  bt_send_cmd_ptr(l2cap_register_service_ptr, PSM_HID_INTERRUPT, 672);
                  btpad_queue_hci_inquiry(HCI_INQUIRY_LAP, 3, 1);
               
                  btpad_queue_run(1);
                  break;
                  
               case HCI_STATE_HALTING:
                  btpad_close_all_connections();
                  CFRunLoopStop(CFRunLoopGetCurrent());
                  break;                  
            }
         }
         break;

         case HCI_EVENT_COMMAND_STATUS:
         btpad_queue_run(packet[3]);
         break;

         case HCI_EVENT_COMMAND_COMPLETE:
         {
            btpad_queue_run(packet[2]);

            if (COMMAND_COMPLETE_EVENT(packet, (*hci_read_bd_addr_ptr)))
            {
               bt_flip_addr_ptr(event_addr, &packet[6]);
               if (!packet[5])
                  RARCH_LOG("BTpad: Local address is %s\n", bd_addr_to_str_ptr(event_addr));
               else
                  RARCH_LOG("BTpad: Failed to get local address (Status: %02X)\n", packet[5]);               
            }
         }
         break;

         case HCI_EVENT_INQUIRY_RESULT:
         {
            if (packet[2])
            {
               bt_flip_addr_ptr(event_addr, &packet[3]);

               struct apple_pad_connection* connection = (struct apple_pad_connection*)btpad_find_empty_connection();

               if (connection)
               {
                  RARCH_LOG("BTpad: Inquiry found device\n");
                  memset(connection, 0, sizeof(struct apple_pad_connection));

                  memcpy(connection->address, event_addr, sizeof(bd_addr_t));
                  connection->has_address = true;
                  connection->state = BTPAD_CONNECTING;

                  bt_send_cmd_ptr(l2cap_create_channel_ptr, connection->address, PSM_HID_CONTROL);
                  bt_send_cmd_ptr(l2cap_create_channel_ptr, connection->address, PSM_HID_INTERRUPT);
               }
            }
         }
         break;

         case HCI_EVENT_INQUIRY_COMPLETE:
         {
            // This must be turned off during gameplay as it causes a ton of lag
            inquiry_running = !inquiry_off;

            if (inquiry_running)
               btpad_queue_hci_inquiry(HCI_INQUIRY_LAP, 3, 1);
         }
         break;

         case L2CAP_EVENT_CHANNEL_OPENED:
         {
            bt_flip_addr_ptr(event_addr, &packet[3]);
            const uint16_t handle = READ_BT_16(packet, 9);
            const uint16_t psm = READ_BT_16(packet, 11);
            const uint16_t channel_id = READ_BT_16(packet, 13);

            struct apple_pad_connection* connection = (struct apple_pad_connection*)btpad_find_connection_for(handle, event_addr);

            if (!packet[2])
            {
               if (!connection)
               {
                  RARCH_LOG("BTpad: Got L2CAP 'Channel Opened' event for unrecognized device\n");
//.........這裏部分代碼省略.........

PsychError ReceiveReports(int deviceIndex)
{
	long error=0;
	pRecDevice device;
	IOHIDDeviceInterface122** interface=NULL;
	int reason; // kCFRunLoopRunFinished, kCFRunLoopRunStopped, kCFRunLoopRunTimedOut, kCFRunLoopRunHandledSource

	PsychHIDVerifyInit();

	if(deviceIndex < 0 || deviceIndex >= MAXDEVICEINDEXS) PrintfExit("Sorry. Can't cope with deviceNumber %d (more than %d). Please tell [email protected]",deviceIndex,(int)MAXDEVICEINDEXS-1);

    // Allocate report buffers if needed:
    PsychHIDAllocateReports(deviceIndex);

	CountReports("ReceiveReports beginning.");
	if (freeReportsPtr[deviceIndex] == NULL) PrintfExit("No free reports.");

	device=PsychHIDGetDeviceRecordPtrFromIndex(deviceIndex);
	if(!HIDIsValidDevice(device))PrintfExit("PsychHID: Invalid device.\n");

	interface = PsychHIDGetDeviceInterfacePtrFromIndex(deviceIndex);
	if(interface==NULL)PrintfExit("PsychHID: No interface for device.\n");
	CheckRunLoopSource(deviceIndex,"ReceiveReports",__LINE__);
	if(!ready[deviceIndex]){
		// setInterruptReportHandlerCallback
		static unsigned char buffer[MAXREPORTSIZE];
		psych_uint32 bufferSize=MAXREPORTSIZE;
		psych_bool createSource;

		createSource=(source[deviceIndex]==NULL);
		if(createSource){
			if(optionsPrintCrashers && createSource)printf("%d: createAsyncEventSource\n",deviceIndex);
			error=(*interface)->createAsyncEventSource(interface,&(source[deviceIndex]));
			if(error)PrintfExit("ReceiveReports - createAsyncEventSource error 0x%lx.",error);
			if(0 && optionsPrintCrashers && createSource)
				printf("%d: source %4.4lx validity %d, CFRunLoopContainsSource is %d.\n",deviceIndex,(unsigned long)source[deviceIndex]
					   ,CFRunLoopSourceIsValid(source[deviceIndex])
					   ,CFRunLoopContainsSource(CFRunLoopGetCurrent(),source[deviceIndex],myRunLoopMode));
		}
		if(optionsPrintCrashers && createSource)printf("%d: getAsyncEventSource\n",deviceIndex);
		CheckRunLoopSource(deviceIndex,"ReceiveReports",__LINE__);
		if(optionsPrintCrashers && createSource)printf("%d: CFRunLoopAddSource\n",deviceIndex);
		CFRunLoopAddSource(CFRunLoopGetCurrent(),source[deviceIndex],myRunLoopMode);
		if(0 && optionsPrintCrashers && createSource)printf("%d: source %4.4lx validity %d, CFRunLoopContainsSource is %d.\n",deviceIndex,(unsigned long)source[deviceIndex]
			   ,CFRunLoopSourceIsValid(source[deviceIndex])
			   ,CFRunLoopContainsSource(CFRunLoopGetCurrent(),source[deviceIndex],myRunLoopMode));
		ready[deviceIndex]=1;
		CheckRunLoopSource(deviceIndex,"ReceiveReports",__LINE__);
		if(optionsPrintCrashers && createSource)printf("%d: setInterruptReportHandlerCallback\n",deviceIndex);
		error=(*interface)->setInterruptReportHandlerCallback(interface,buffer,bufferSize,ReportCallback,buffer,(void *)(long int) deviceIndex);
		if(error)PrintfExit("ReceiveReports - setInterruptReportHandlerCallback error 0x%lx.",error);
		if(optionsPrintCrashers && createSource)printf("%d: CFRunLoopRunInMode.\n",deviceIndex);
	}
	//printf("%d: CFRunLoopRunInMode\n",deviceIndex);
	reason=CFRunLoopRunInMode(myRunLoopMode,optionsSecs,false);
	if(reason!=kCFRunLoopRunTimedOut && reason!=kCFRunLoopRunHandledSource){
		char *s;
		switch(reason){
			case kCFRunLoopRunFinished: s="kCFRunLoopRunFinished"; break;
			case kCFRunLoopRunStopped: s="kCFRunLoopRunStopped"; break;
			case kCFRunLoopRunTimedOut: s="kCFRunLoopRunTimedOut"; break;
			case kCFRunLoopRunHandledSource: s="kCFRunLoopRunHandledSource"; break;
			default: s="of unknown reason.";
		}
		printf("RunLoop ended at %.3f s because %s.\n",CFAbsoluteTimeGetCurrent()-AInScanStart,s);			
	}
	CountReports("ReceiveReports end.");
	return error;
}

int DeviceManagerThread::Run()
{

    SetThreadName("OVR::DeviceManagerThread");
    LogText("OVR::DeviceManagerThread - running (ThreadId=0x%p).\n", GetThreadId());

    // Store out the run loop ref.
    RunLoop = CFRunLoopGetCurrent();

    // Create a 'source' to enable us to signal the run loop to process the command queue.
    CFRunLoopSourceContext sourceContext;
    memset(&sourceContext, 0, sizeof(sourceContext));
    sourceContext.version = 0;
    sourceContext.info = this;
    sourceContext.perform = &staticCommandQueueSourceCallback;

    CommandQueueSource = CFRunLoopSourceCreate(kCFAllocatorDefault, 0 , &sourceContext);

    CFRunLoopAddSource(RunLoop, CommandQueueSource, kCFRunLoopDefaultMode);


    // Signal to the parent thread that initialization has finished.
    StartupEvent.SetEvent();


    ThreadCommand::PopBuffer command;
   
    while(!IsExiting())
    {
        // PopCommand will reset event on empty queue.
        if (PopCommand(&command))
        {
            command.Execute();
        }
        else
        {
            SInt32 exitReason = 0;
            do {

                UInt32 waitMs = INT_MAX;

                // If devices have time-dependent logic registered, get the longest wait
                // allowed based on current ticks.
                if (!TicksNotifiers.IsEmpty())
                {
                    UInt64 ticksMks = Timer::GetTicks();
                    UInt32  waitAllowed;

                    for (UPInt j = 0; j < TicksNotifiers.GetSize(); j++)
                    {
                        waitAllowed = (UInt32)(TicksNotifiers[j]->OnTicks(ticksMks) / Timer::MksPerMs);
                        if (waitAllowed < waitMs)
                            waitMs = waitAllowed;
                    }
                }
                
                // Enter blocking run loop. We may continue until we timeout in which
                // case it's time to service the ticks. Or if commands arrive in the command
                // queue then the source callback will call 'CFRunLoopStop' causing this
                // to return.
                CFTimeInterval blockInterval = 0.001 * (double) waitMs;
                exitReason = CFRunLoopRunInMode(kCFRunLoopDefaultMode, blockInterval, false);

                if (exitReason == kCFRunLoopRunFinished)
                {
                    // Maybe this will occur during shutdown?
                    break;
                }
                else if (exitReason == kCFRunLoopRunStopped )
                {
                    // Commands need processing or we're being shutdown.
                    break;
                }
                else if (exitReason == kCFRunLoopRunTimedOut)
                {
                    // Timed out so that we can service our ticks callbacks.
                    continue;
                }
                else if (exitReason == kCFRunLoopRunHandledSource)
                {
                    // Should never occur since the last param when we call
                    // 'CFRunLoopRunInMode' is false.
                    OVR_ASSERT(false);
                    break;
                }
                else
                {
                    OVR_ASSERT_LOG(false, ("CFRunLoopRunInMode returned unexpected code"));
                    break;
                }
            }
            while(true);                    
        }
    }

                                   
    CFRunLoopRemoveSource(RunLoop, CommandQueueSource, kCFRunLoopDefaultMode);
    CFRelease(CommandQueueSource);
    
    LogText("OVR::DeviceManagerThread - exiting (ThreadId=0x%p).\n", GetThreadId());
//.........這裏部分代碼省略.........

/* Function to scan the system for joysticks.
 * Joystick 0 should be the system default joystick.
 * This function should return the number of available joysticks, or -1
 * on an unrecoverable fatal error.
 */
int
SDL_SYS_JoystickInit(void)
{
    IOReturn result = kIOReturnSuccess;
    mach_port_t masterPort = 0;
    io_iterator_t hidObjectIterator = 0;
    CFMutableDictionaryRef hidMatchDictionary = NULL;
    io_object_t ioHIDDeviceObject = 0;
	io_iterator_t portIterator = 0;

    if (gpDeviceList) {
        SDL_SetError("Joystick: Device list already inited.");
        return -1;
    }

    result = IOMasterPort(bootstrap_port, &masterPort);
    if (kIOReturnSuccess != result) {
        SDL_SetError("Joystick: IOMasterPort error with bootstrap_port.");
        return -1;
    }

    /* Set up a matching dictionary to search I/O Registry by class name for all HID class devices. */
    hidMatchDictionary = IOServiceMatching(kIOHIDDeviceKey);
    if (hidMatchDictionary) {
        /* Add key for device type (joystick, in this case) to refine the matching dictionary. */

        /* NOTE: we now perform this filtering later
           UInt32 usagePage = kHIDPage_GenericDesktop;
           UInt32 usage = kHIDUsage_GD_Joystick;
           CFNumberRef refUsage = NULL, refUsagePage = NULL;

           refUsage = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &usage);
           CFDictionarySetValue (hidMatchDictionary, CFSTR (kIOHIDPrimaryUsageKey), refUsage);
           refUsagePage = CFNumberCreate (kCFAllocatorDefault, kCFNumberIntType, &usagePage);
           CFDictionarySetValue (hidMatchDictionary, CFSTR (kIOHIDPrimaryUsagePageKey), refUsagePage);
         */
    } else {
        SDL_SetError
            ("Joystick: Failed to get HID CFMutableDictionaryRef via IOServiceMatching.");
        return -1;
    }

    /*/ Now search I/O Registry for matching devices. */
    result =
        IOServiceGetMatchingServices(masterPort, hidMatchDictionary,
                                     &hidObjectIterator);
    /* Check for errors */
    if (kIOReturnSuccess != result) {
        SDL_SetError("Joystick: Couldn't create a HID object iterator.");
        return -1;
    }
    if (!hidObjectIterator) {   /* there are no joysticks */
        gpDeviceList = NULL;
        return 0;
    }
    /* IOServiceGetMatchingServices consumes a reference to the dictionary, so we don't need to release the dictionary ref. */

    /* build flat linked list of devices from device iterator */

    gpDeviceList = NULL;

    while ((ioHIDDeviceObject = IOIteratorNext(hidObjectIterator))) {
		AddDeviceHelper( ioHIDDeviceObject );
    }
    result = IOObjectRelease(hidObjectIterator);        /* release the iterator */
	
	/* now connect notification for new devices */
	notificationPort = IONotificationPortCreate(masterPort);
	hidMatchDictionary = IOServiceMatching(kIOHIDDeviceKey);

	CFRunLoopAddSource(CFRunLoopGetCurrent(), 
					   IONotificationPortGetRunLoopSource(notificationPort), 
					   kCFRunLoopDefaultMode);
	
	// Register for notifications when a serial port is added to the system
	result = IOServiceAddMatchingNotification(notificationPort,
															kIOFirstMatchNotification,
															hidMatchDictionary,
															JoystickDeviceWasAddedCallback,
															NULL,           
															&portIterator);
	while (IOIteratorNext(portIterator)) {}; // Run out the iterator or notifications won't start (you can also use it to iterate the available devices).

    return SDL_SYS_NumJoysticks();
}

//.........這裏部分代碼省略.........
									CGEventMaskBit(kCGEventRightMouseUp) |
									CGEventMaskBit(kCGEventRightMouseDragged) |

									CGEventMaskBit(kCGEventOtherMouseDown) |
									CGEventMaskBit(kCGEventOtherMouseUp) |
									CGEventMaskBit(kCGEventOtherMouseDragged) |

									CGEventMaskBit(kCGEventMouseMoved) |
									CGEventMaskBit(kCGEventScrollWheel);

		#ifdef USE_DEBUG
		event_mask |= CGEventMaskBit(kCGEventNull);
		#endif

		CFMachPortRef event_port = CGEventTapCreate(
										kCGSessionEventTap,				// kCGHIDEventTap
										kCGHeadInsertEventTap,			// kCGTailAppendEventTap
										kCGEventTapOptionListenOnly,	// kCGEventTapOptionDefault See Bug #22
										event_mask,
										hook_event_proc,
										NULL
									);


		if (event_port != NULL) {
			logger(LOG_LEVEL_DEBUG,	"%s [%u]: CGEventTapCreate Successful.\n",
					__FUNCTION__, __LINE__);

			event_source = CFMachPortCreateRunLoopSource(kCFAllocatorDefault, event_port, 0);
			if (event_source != NULL) {
				logger(LOG_LEVEL_DEBUG,	"%s [%u]: CFMachPortCreateRunLoopSource successful.\n",
						__FUNCTION__, __LINE__);

				event_loop = CFRunLoopGetCurrent();
				if (event_loop != NULL) {
					logger(LOG_LEVEL_DEBUG,	"%s [%u]: CFRunLoopGetCurrent successful.\n",
							__FUNCTION__, __LINE__);

					// Initialize Native Input Functions.
					load_input_helper();


					// Create run loop observers.
					CFRunLoopObserverRef observer = CFRunLoopObserverCreate(
														kCFAllocatorDefault,
														kCFRunLoopEntry | kCFRunLoopExit, //kCFRunLoopAllActivities,
														true,
														0,
														hook_status_proc,
														NULL
													);

					if (observer != NULL) {
						// Set the exit status.
						*status = UIOHOOK_SUCCESS;

						start_message_port_runloop();

						CFRunLoopAddSource(event_loop, event_source, kCFRunLoopDefaultMode);
						CFRunLoopAddObserver(event_loop, observer, kCFRunLoopDefaultMode);

						CFRunLoopRun();

						// Lock back up until we are done processing the exit.
						CFRunLoopRemoveObserver(event_loop, observer, kCFRunLoopDefaultMode);
						CFRunLoopRemoveSource(event_loop, event_source, kCFRunLoopDefaultMode);

void DoAQOfflineRender(CFURLRef sourceURL, CFURLRef destinationURL) 
{
    // main audio queue code
	try {
		AQTestInfo myInfo;
        
		myInfo.mDone = false;
		myInfo.mFlushed = false;
		myInfo.mCurrentPacket = 0;
		
        // get the source file
        XThrowIfError(AudioFileOpenURL(sourceURL, 0x01/*fsRdPerm*/, 0/*inFileTypeHint*/, &myInfo.mAudioFile), "AudioFileOpen failed");
			
		UInt32 size = sizeof(myInfo.mDataFormat);
		XThrowIfError(AudioFileGetProperty(myInfo.mAudioFile, kAudioFilePropertyDataFormat, &size, &myInfo.mDataFormat), "couldn't get file's data format");
		
		printf ("File format: "); myInfo.mDataFormat.Print();

        // create a new audio queue output
		XThrowIfError(AudioQueueNewOutput(&myInfo.mDataFormat,      // The data format of the audio to play. For linear PCM, only interleaved formats are supported.
                                          AQTestBufferCallback,     // A callback function to use with the playback audio queue.
                                          &myInfo,                  // A custom data structure for use with the callback function.
                                          CFRunLoopGetCurrent(),    // The event loop on which the callback function pointed to by the inCallbackProc parameter is to be called.
                                                                    // If you specify NULL, the callback is invoked on one of the audio queue’s internal threads.
                                          kCFRunLoopCommonModes,    // The run loop mode in which to invoke the callback function specified in the inCallbackProc parameter. 
                                          0,                        // Reserved for future use. Must be 0.
                                          &myInfo.mQueue),          // On output, the newly created playback audio queue object.
                                          "AudioQueueNew failed");

		UInt32 bufferByteSize;
		
		// we need to calculate how many packets we read at a time and how big a buffer we need
		// we base this on the size of the packets in the file and an approximate duration for each buffer
		{
			bool isFormatVBR = (myInfo.mDataFormat.mBytesPerPacket == 0 || myInfo.mDataFormat.mFramesPerPacket == 0);
			
			// first check to see what the max size of a packet is - if it is bigger
			// than our allocation default size, that needs to become larger
			UInt32 maxPacketSize;
			size = sizeof(maxPacketSize);
			XThrowIfError(AudioFileGetProperty(myInfo.mAudioFile, kAudioFilePropertyPacketSizeUpperBound, &size, &maxPacketSize), "couldn't get file's max packet size");
			
			// adjust buffer size to represent about a second of audio based on this format
			CalculateBytesForTime(myInfo.mDataFormat, maxPacketSize, 1.0/*seconds*/, &bufferByteSize, &myInfo.mNumPacketsToRead);
			
			if (isFormatVBR) {
				myInfo.mPacketDescs = new AudioStreamPacketDescription [myInfo.mNumPacketsToRead];
			} else {
				myInfo.mPacketDescs = NULL; // we don't provide packet descriptions for constant bit rate formats (like linear PCM)
            }
				
			printf ("Buffer Byte Size: %d, Num Packets to Read: %d\n", (int)bufferByteSize, (int)myInfo.mNumPacketsToRead);
		}

		// if the file has a magic cookie, we should get it and set it on the AQ
		size = sizeof(UInt32);
		OSStatus result = AudioFileGetPropertyInfo (myInfo.mAudioFile, kAudioFilePropertyMagicCookieData, &size, NULL);

		if (!result && size) {
			char* cookie = new char [size];		
			XThrowIfError (AudioFileGetProperty (myInfo.mAudioFile, kAudioFilePropertyMagicCookieData, &size, cookie), "get cookie from file");
			XThrowIfError (AudioQueueSetProperty(myInfo.mQueue, kAudioQueueProperty_MagicCookie, cookie, size), "set cookie on queue");
			delete [] cookie;
		}

		// channel layout?
		OSStatus err = AudioFileGetPropertyInfo(myInfo.mAudioFile, kAudioFilePropertyChannelLayout, &size, NULL);
		AudioChannelLayout *acl = NULL;
		if (err == noErr && size > 0) {
			acl = (AudioChannelLayout *)malloc(size);
			XThrowIfError(AudioFileGetProperty(myInfo.mAudioFile, kAudioFilePropertyChannelLayout, &size, acl), "get audio file's channel layout");
			XThrowIfError(AudioQueueSetProperty(myInfo.mQueue, kAudioQueueProperty_ChannelLayout, acl, size), "set channel layout on queue");
		}

		//allocate the input read buffer
		XThrowIfError(AudioQueueAllocateBuffer(myInfo.mQueue, bufferByteSize, &myInfo.mBuffer), "AudioQueueAllocateBuffer");

		// prepare a canonical interleaved capture format
		CAStreamBasicDescription captureFormat;
		captureFormat.mSampleRate = myInfo.mDataFormat.mSampleRate;
		captureFormat.SetAUCanonical(myInfo.mDataFormat.mChannelsPerFrame, true); // interleaved
		XThrowIfError(AudioQueueSetOfflineRenderFormat(myInfo.mQueue, &captureFormat, acl), "set offline render format");			
		
		ExtAudioFileRef captureFile;
        
		// prepare a 16-bit int file format, sample channel count and sample rate
		CAStreamBasicDescription dstFormat;
		dstFormat.mSampleRate = myInfo.mDataFormat.mSampleRate;
		dstFormat.mChannelsPerFrame = myInfo.mDataFormat.mChannelsPerFrame;
		dstFormat.mFormatID = kAudioFormatLinearPCM;
		dstFormat.mFormatFlags = kLinearPCMFormatFlagIsPacked | kLinearPCMFormatFlagIsSignedInteger; // little-endian
		dstFormat.mBitsPerChannel = 16;
		dstFormat.mBytesPerPacket = dstFormat.mBytesPerFrame = 2 * dstFormat.mChannelsPerFrame;
		dstFormat.mFramesPerPacket = 1;
		
		// create the capture file
        XThrowIfError(ExtAudioFileCreateWithURL(destinationURL, kAudioFileCAFType, &dstFormat, acl, kAudioFileFlags_EraseFile, &captureFile), "ExtAudioFileCreateWithURL");
		
        // set the capture file's client format to be the canonical format from the queue
		XThrowIfError(ExtAudioFileSetProperty(captureFile, kExtAudioFileProperty_ClientDataFormat, sizeof(AudioStreamBasicDescription), &captureFormat), "set ExtAudioFile client format");
//.........這裏部分代碼省略.........

static void fse_pipe_callback(CFFileDescriptorRef, CFOptionFlags, void*) {
  w_log(W_LOG_DBG, "pipe signalled\n");
  CFRunLoopStop(CFRunLoopGetCurrent());
}

//.........這裏部分代碼省略.........
  cpath = CFStringCreateWithBytes(
      nullptr,
      (const UInt8*)root->root_path.data(),
      root->root_path.size(),
      kCFStringEncodingUTF8,
      false);
  if (!cpath) {
    failure_reason =
        w_string("CFStringCreateWithBytes failed", W_STRING_UNICODE);
    goto fail;
  }

  CFArrayAppendValue(parray, cpath);

  latency = root->config.getDouble("fsevents_latency", 0.01),
  w_log(
      W_LOG_DBG,
      "FSEventStreamCreate for path %s with latency %f seconds\n",
      root->root_path.c_str(),
      latency);

  fse_stream->stream = FSEventStreamCreate(
      nullptr,
      fse_callback,
      &ctx,
      parray,
      since,
      latency,
      kFSEventStreamCreateFlagNoDefer | kFSEventStreamCreateFlagWatchRoot |
          kFSEventStreamCreateFlagFileEvents);

  if (!fse_stream->stream) {
    failure_reason = w_string("FSEventStreamCreate failed", W_STRING_UNICODE);
    goto fail;
  }

  FSEventStreamScheduleWithRunLoop(fse_stream->stream,
      CFRunLoopGetCurrent(), kCFRunLoopDefaultMode);

#ifdef HAVE_FSEVENTSTREAMSETEXCLUSIONPATHS
  if (!root->ignore.dirs_vec.empty() &&
      root->config.getBool("_use_fsevents_exclusions", true)) {
    CFMutableArrayRef ignarray;
    size_t i, nitems = std::min(root->ignore.dirs_vec.size(), MAX_EXCLUSIONS);

    ignarray = CFArrayCreateMutable(nullptr, 0, &kCFTypeArrayCallBacks);
    if (!ignarray) {
      failure_reason =
          w_string("CFArrayCreateMutable failed", W_STRING_UNICODE);
      goto fail;
    }

    for (i = 0; i < nitems; ++i) {
      const auto& path = root->ignore.dirs_vec[i];
      CFStringRef ignpath;

      ignpath = CFStringCreateWithBytes(
          nullptr,
          (const UInt8*)path.data(),
          path.size(),
          kCFStringEncodingUTF8,
          false);

      if (!ignpath) {
        failure_reason =
            w_string("CFStringCreateWithBytes failed", W_STRING_UNICODE);
        CFRelease(ignarray);
        goto fail;
      }

      CFArrayAppendValue(ignarray, ignpath);
      CFRelease(ignpath);
    }

    if (!FSEventStreamSetExclusionPaths(fse_stream->stream, ignarray)) {
      failure_reason =
          w_string("FSEventStreamSetExclusionPaths failed", W_STRING_UNICODE);
      CFRelease(ignarray);
      goto fail;
    }

    CFRelease(ignarray);
  }
#endif

out:
  if (parray) {
    CFRelease(parray);
  }
  if (cpath) {
    CFRelease(cpath);
  }

  return fse_stream;

fail:
  delete fse_stream;
  fse_stream = nullptr;
  goto out;
}

void
load(CFBundleRef bundle, Boolean bundleVerbose)
{
	CFStringRef		key;
	CFMutableArrayRef	keys		= NULL;
	CFStringRef		pattern;
	CFMutableArrayRef	patterns	= NULL;
	CFRunLoopSourceRef	rls;

	if (bundleVerbose) {
		_verbose = TRUE;
	}

	SCLog(_verbose, LOG_DEBUG, CFSTR("load() called"));
	SCLog(_verbose, LOG_DEBUG, CFSTR("  bundle ID = %@"), CFBundleGetIdentifier(bundle));

	/* initialize a few globals */

	curGlobals    = CFDictionaryCreateMutable(NULL,
						  0,
						  &kCFTypeDictionaryKeyCallBacks,
						  &kCFTypeDictionaryValueCallBacks);
	curConfigFile = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
	curDefaults   = CFDictionaryCreateMutable(NULL,
						  0,
						  &kCFTypeDictionaryKeyCallBacks,
						  &kCFTypeDictionaryValueCallBacks);
	curStartup    = CFDictionaryCreateMutable(NULL,
						  0,
						  &kCFTypeDictionaryKeyCallBacks,
						  &kCFTypeDictionaryValueCallBacks);

	/* open a "configd" store to allow cache updates */
	store = SCDynamicStoreCreate(NULL,
				     CFSTR("AppleTalk Configuraton plug-in"),
				     atConfigChangedCallback,
				     NULL);
	if (!store) {
		SCLog(TRUE, LOG_ERR, CFSTR("SCDynamicStoreCreate() failed: %s"), SCErrorString(SCError()));
		goto error;
	}

	/* establish notificaiton keys and patterns */

	keys     = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);
	patterns = CFArrayCreateMutable(NULL, 0, &kCFTypeArrayCallBacks);

	/* ...watch for (global) AppleTalk configuration changes */
	key = SCDynamicStoreKeyCreateNetworkGlobalEntity(NULL,
							 kSCDynamicStoreDomainSetup,
							 kSCEntNetAppleTalk);
	CFArrayAppendValue(keys, key);
	CFRelease(key);

	/* ...watch for (per-service) AppleTalk configuration changes */
	pattern = SCDynamicStoreKeyCreateNetworkServiceEntity(NULL,
							      kSCDynamicStoreDomainSetup,
							      kSCCompAnyRegex,
							      kSCEntNetAppleTalk);
	CFArrayAppendValue(patterns, pattern);
	CFRelease(pattern);

	/* ...watch for network interface link status changes */
	pattern = SCDynamicStoreKeyCreateNetworkInterfaceEntity(NULL,
								kSCDynamicStoreDomainState,
								kSCCompAnyRegex,
								kSCEntNetLink);
	CFArrayAppendValue(patterns, pattern);
	CFRelease(pattern);

	/* ...watch for (per-interface) AppleTalk configuration changes */
	pattern = SCDynamicStoreKeyCreateNetworkInterfaceEntity(NULL,
								kSCDynamicStoreDomainState,
								kSCCompAnyRegex,
								kSCEntNetAppleTalk);
	CFArrayAppendValue(patterns, pattern);
	CFRelease(pattern);

	/* ...watch for computer name changes */
	key = SCDynamicStoreKeyCreateComputerName(NULL);
	CFArrayAppendValue(keys, key);
	CFRelease(key);

	/* register the keys/patterns */
	if (!SCDynamicStoreSetNotificationKeys(store, keys, patterns)) {
		SCLog(TRUE, LOG_ERR,
		      CFSTR("SCDynamicStoreSetNotificationKeys() failed: %s"),
		      SCErrorString(SCError()));
		goto error;
	}

	rls = SCDynamicStoreCreateRunLoopSource(NULL, store, 0);
	if (!rls) {
		SCLog(TRUE, LOG_ERR,
		      CFSTR("SCDynamicStoreCreateRunLoopSource() failed: %s"),
		      SCErrorString(SCError()));
		goto error;
	}

	CFRunLoopAddSource(CFRunLoopGetCurrent(), rls, kCFRunLoopDefaultMode);
//.........這裏部分代碼省略.........

GCActivityCallback::GCActivityCallback(Heap* heap)
    : GCActivityCallback(heap->vm(), CFRunLoopGetCurrent())
{
}

int main (int argc, const char * argv[])
    // This program finds the first PPP connection service in the 
    // current network configuration and then connects and 
    // disconnects that service.
{
    int                     err;
    Boolean                 ok;
    CFStringRef             serviceToDial;
    CFDictionaryRef         optionsForDial;
    SCNetworkConnectionRef  connection;
    CallbackParams          params;
    
    serviceToDial  = NULL;
    optionsForDial = NULL;
    connection     = NULL;
    
    // If we're run without an argument, just print the usage.
    
    err = 0;
    if (argc != 1) {
        const char *programName;
        
        programName = strrchr(argv[0], '/');
        if (programName == NULL) {
            programName = argv[0];
        } else {
            programName += 1;
        }
        fprintf(stderr, "Usage: %s\n", programName);
        err = ECANCELED;
    }

    // Find the serviceID of the PPP service to dial and the user's 
    // preferred dialling options.  This routine picks up the last 
    // service dialled using Internet Connect (and the associated 
    // options) or, if Internet Connect has not been used, returns 
    // the first PPP service listed in the Network preferences pane.
    
    if (err == 0) {
        ok = SCNetworkConnectionCopyUserPreferences(
            NULL, 
            &serviceToDial,
            &optionsForDial
        );
        if ( ! ok ) {
            err = SCError();
        }
    }
    
    // Create a SCNetworkConnectionRef for it.
    
    if (err == 0) {
        SCNetworkConnectionContext context;

        // Set up the parameters to our callback function.
        
        params.magic            = kCallbackParamsMagic;
        params.forcePrintStatus = true;
        params.lastMinorStatus  = kSCNetworkConnectionDisconnected;
        params.lastMinorStatus  = kSCNetworkConnectionPPPDisconnected;
        
        // Set up the context to reference those parameters.
        
        context.version         = 0;
        context.info            = (void *) &params;
        context.retain          = NULL;
        context.release         = NULL;
        context.copyDescription = NULL;
        
        connection = SCNetworkConnectionCreateWithServiceID(
            NULL,
            serviceToDial, 
            MyNetworkConnectionCallBack,
            &context
        );
        if (connection == NULL) {
            err = SCError();
        }
    }

    // Schedule our callback with the runloop.
    
    if (err == 0) {
        ok = SCNetworkConnectionScheduleWithRunLoop(
            connection,
            CFRunLoopGetCurrent(),
            kCFRunLoopDefaultMode
        );
        if ( ! ok ) {
            err = SCError();
        }
    }
    
    // Check the status.  If we're already connected tell the user. 
    // If we're not connected, initiate the connection.
    
    if (err == 0) {
        err = ECANCELED;    // Most cases involve us bailing out, 
                            // so set the error here.
        
//.........這裏部分代碼省略.........

static void MyNetworkConnectionCallBack(
    SCNetworkConnectionRef          connection,
    SCNetworkConnectionStatus       status,
    void                            *info
)
    // Our network connection callback.  Called out of the runloop 
    // when there's a change in the status of the network connection.
    // It can be called as part of both a connection attempt and a 
    // disconnection attempt.
    //
    // In response to this callback we do two things:
    //
    // 1. Print the current connection status.
    // 2. Once the [dis]connection attempt is resolved (the status 
    //    hits either 'connected' or 'disconnected'), we stop 
    //    the runloop.  This has the effect of breaking the "main" 
    //    function out of its called to CFRunLoopRun, after which 
    //    it can examine the results of the connection.
    //
    // The "info" parameter is a pointer to our per-connection data. 
    // In this case we use this as a pointer to a CallbackParams 
    // structure.  We use this to track the previous state of the 
    // connection so that we don't print redundant status changes.
{
    CallbackParams *                params;
    SCNetworkConnectionPPPStatus    minorStatus;
    time_t                          now;
    struct tm                       nowLocal;
    char                            nowLocalStr[30];
    Boolean                         printMinorStatus;
    
    assert(connection != NULL);
    assert(info != NULL);
    params = (CallbackParams *) info;
    assert(params->magic = kCallbackParamsMagic);

    // Get a string that represents the current time.
    
    (void) time(&now);
    (void) localtime_r(&now, &nowLocal);
    (void) strftime(nowLocalStr, sizeof(nowLocalStr), "%X", &nowLocal);

    // Due to a bug <rdar://problem/3725976>, it's best to get the major status via 
    // SCNetworkConnectionGetStatus than rely on the value being passed into 
    // the callback.

    status = SCNetworkConnectionGetStatus(connection);
    
    // Get the minor status from the extended status associated with 
    // the connection.
    
    minorStatus = GetMinorStatus(connection);
    
    // Print any status changes.
    
    printMinorStatus = (params->lastMinorStatus != minorStatus);
    if (  (params->forcePrintStatus) 
       || (params->lastMajorStatus != status) 
       ) {
        fprintf(
            stderr, 
            "%s %s (%ld)\n", 
            nowLocalStr, 
            StatusToString(status), 
            (long) status
        );
        printMinorStatus = true;
        params->forcePrintStatus = false;
    }
    if (printMinorStatus) {
        fprintf(
            stderr, 
            "%s     %s (%ld)\n", 
            nowLocalStr, 
            MinorStatusToString(minorStatus), 
            (long) minorStatus
        );
    }

    // If we hit either the connected or disconnected state, 
    // we signal the runloop to stop so that the main function 
    // can process the result of the [dis]connection attempt.
    
    if (  (  minorStatus == kSCNetworkConnectionPPPDisconnected ) 
       || (  minorStatus == kSCNetworkConnectionPPPConnected    ) 
       ) {
        CFRunLoopStop(CFRunLoopGetCurrent());
    }

    // Record the new status.
    
    params->lastMajorStatus = status;
    params->lastMinorStatus = minorStatus;
}

int
main (int argc, const char *argv[])
{
    CFURLRef audioFileURLRef;
    OSStatus ret;

    audioFileURLRef = CFURLCreateWithFileSystemPath (
            kCFAllocatorDefault,
			/* CFSTR ("../misc/test.wav"), */
			CFSTR ("../misc/alin.wav"),
            kCFURLPOSIXPathStyle,
            FALSE
            );

    ret = AudioFileOpenURL(
            audioFileURLRef,
            kAudioFileReadWritePermission,
            0,
            &myInfo.mAudioFile);
    if (ret != noErr) {
        printf("fail to open audio file %x\n", ret);
        return 1;
    }

    UInt32 propSize = sizeof(myInfo.mDataFormat);
    ret = AudioFileGetProperty(
            myInfo.mAudioFile,
            kAudioFilePropertyDataFormat,
            &propSize,
            &myInfo.mDataFormat
            );
    if (ret != noErr) {
        printf("AudioFileGetProperty error code %d\n", ret);
        return 1;
    }
    printf("sample rate: %f\n"
            "mFormatID: %u\n"
            "mFormatFlags: %u\n"
            "mBytesPerPacket: %u\n"
            "mChannelsPerFrame: %u\n",
            myInfo.mDataFormat.mSampleRate,
            myInfo.mDataFormat.mFormatID,
            myInfo.mDataFormat.mFormatFlags,
            myInfo.mDataFormat.mBytesPerPacket,
            myInfo.mDataFormat.mChannelsPerFrame
          );

    // Instantiate an audio queue object
    ret = AudioQueueNewOutput(
            &myInfo.mDataFormat,
            AQTestBufferCallback,
            &myInfo,
            CFRunLoopGetCurrent(),
            kCFRunLoopCommonModes,
            0,
            &myInfo.mQueue
            );
    if (ret != noErr) {
        printf("AudioQueueNewOutput error code %d\n", ret);
        return 1;
    }

    AudioQueueAddPropertyListener(myInfo.mQueue, kAudioQueueProperty_IsRunning,
            AudioEnginePropertyListenerProc, &myInfo);
    

    /* FIXME allocate AudioQueue buffer */ 
    int i;
    for (i = 0; i < 3; i++) {
        AudioQueueAllocateBuffer(myInfo.mQueue, 441 * 4, &myInfo.mBuffers[i]);
    }
    AudioQueueStart(myInfo.mQueue, NULL);

    printf("Run loop\n");
    // create a system sound ID to represent the sound file
    /* OSStatus error = AudioServicesCreateSystemSoundID (myURLRef, &mySSID); */

    // Register the sound completion callback.
    // Again, useful when you need to free memory after playing.
    /* AudioServicesAddSystemSoundCompletion ( */
            /* mySSID, */
            /* NULL, */
            /* NULL, */
            /* MyCompletionCallback, */
            /* (void *) myURLRef */
            /* ); */

    // Play the sound file.
    /* AudioServicesPlaySystemSound (mySSID); */

    // Invoke a run loop on the current thread to keep the application
    // running long enough for the sound to play; the sound completion
    // callback later stops this run loop.
    CFRunLoopRun ();
    return 0;
}

FskErr FskFSDirectoryChangeNotifierNew(const char *path, UInt32 flags, FskDirectoryChangeNotifierCallbackProc callback, void *refCon, FskDirectoryChangeNotifier *dirChangeNotifier)
{
	FskErr err = kFskErrNone;
	FskFSDirectoryChangeNotifier directoryChangeNotifier;
	struct kevent eventToAdd;
	int errNum;
	CFFileDescriptorContext context = {0, NULL, NULL, NULL, NULL};
	CFRunLoopSourceRef rls;

	err = FskMemPtrNewClear(sizeof(FskFSDirectoryChangeNotifierRecord), (FskMemPtr *)(&directoryChangeNotifier));
	BAIL_IF_ERR(err);

	directoryChangeNotifier->base.dispatch.dispatch = &gFSDispatch;
	directoryChangeNotifier->callback = callback;
	directoryChangeNotifier->refCon = refCon;
	directoryChangeNotifier->path = FskStrDoCopy(path);
	directoryChangeNotifier->dirFD = -1;
	directoryChangeNotifier->kq = -1;
	directoryChangeNotifier->dirKQRef = NULL;

	directoryChangeNotifier->dirFD = open(path, O_EVTONLY);
	if (directoryChangeNotifier->dirFD < 0)
	{
		BAIL(kFskErrFileNotFound);
	}
    
	directoryChangeNotifier->kq = kqueue();
	if (directoryChangeNotifier->kq < 0)
	{
		BAIL(kFskErrOperationFailed);
	}
    
	eventToAdd.ident = directoryChangeNotifier->dirFD;
	eventToAdd.filter = EVFILT_VNODE;
	eventToAdd.flags = EV_ADD | EV_CLEAR;
	eventToAdd.fflags = NOTE_WRITE;
	eventToAdd.data = 0;
	eventToAdd.udata = NULL;

	errNum = kevent(directoryChangeNotifier->kq, &eventToAdd, 1, NULL, 0, NULL);
	if (errNum != 0)
	{
		BAIL(kFskErrOperationFailed);
	}

	context.info = directoryChangeNotifier;
	directoryChangeNotifier->dirKQRef = CFFileDescriptorCreate(NULL, directoryChangeNotifier->kq, true, KQCallback, &context);
	if (directoryChangeNotifier->dirKQRef == NULL)
	{
		BAIL(kFskErrOperationFailed);
	}

	rls = CFFileDescriptorCreateRunLoopSource(NULL, directoryChangeNotifier->dirKQRef, 0);
	if (rls == NULL)
	{
		BAIL(kFskErrOperationFailed);
	}

	CFRunLoopAddSource(CFRunLoopGetCurrent(), rls, kCFRunLoopDefaultMode);
	CFRelease(rls);
	CFFileDescriptorEnableCallBacks(directoryChangeNotifier->dirKQRef, kCFFileDescriptorReadCallBack);

bail:
	if (err)
	{
		FskFSDirectoryChangeNotifierDispose((FskDirectoryChangeNotifier)directoryChangeNotifier);
		directoryChangeNotifier = NULL;
	}

	*dirChangeNotifier = (FskDirectoryChangeNotifier)directoryChangeNotifier;
	return err;
}