主线程 RunLoop 学习笔记

以下为主RunLoop 的输出，能够看到不同的source0，source1，observer

----------------------------------

CFRunLoop{wakeup port =, stopped = false, ignoreWakeUps = false,
current mode = kCFRunLoopDefaultMode,
common modes

{
　　<CFString 0x108f42000 [0x107bd39b0]>{contents = "UITrackingRunLoopMode"}
　　<CFString 0x107ba9800 [0x107bd39b0]>{contents = "kCFRunLoopDefaultMode"}
}

common mode items

(
　　 <CFRunLoopSource>{callout = PurpleEventSignalCallback}}
　　<CFRunLoopObserver>{callout = _wrapRunLoopWithAutoreleasePoolHandler}
　　 <CFRunLoopSource>{callout = FBSSerialQueueRunLoopSourceHandler}}
　　<CFRunLoopObserver>{callout = _beforeCACommitHandler}
　　<CFRunLoopSource>{callout = __handleHIDEventFetcherDrain}}
　　<CFRunLoopObserver>{callout = _wrapRunLoopWithAutoreleasePoolHandler}
　　<CFRunLoopObserver>{callout = _afterCACommitHandler}
　　<CFRunLoopObserver>{callout = _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv}
　　<CFRunLoopSource>{callout = __handleEventQueue}
　　<CFRunLoopObserver>{callout = _UIGestureRecognizerUpdateObserver}
　　<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 17927, subsystem = 0x108ef9998, context = 0x0}}
　　<CFRunLoopSource>{callout = PurpleEventCallback}}
　　<CFRunLoopSource>{callout = _ZL27change_notify_port_callbackP12__CFMachPortPvlS1_}
　　<CFRunLoopTimer>{callout = _ZN2CAL14timer_callbackEP16__CFRunLoopTimerPv}
　　<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 22535, subsystem =, context =}}
　　<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 40455, subsystem =, context =}}

)

1） <CFRunLoopMode>{name = UITrackingRunLoopMode, port set = 0x1e07, queue =, source =, timer port = 0x2003}

sources0
(
　　<CFRunLoopSource>{callout = PurpleEventSignalCallback}
　　<CFRunLoopSource>{callout = __handleEventQueue}
　　<CFRunLoopSource>{callout = __handleHIDEventFetcherDrain}
　　<CFRunLoopSource>{callout = FBSSerialQueueRunLoopSourceHandler}
)

sources1
(
　　<CFRunLoopSource>{<CFRunLoopSource MIG Server>}
　　<CFRunLoopSource>{CFMachPort{callout = _ZL27change_notify_port_callbackP12__CFMachPortPvlS1_}}
　　<CFRunLoopSource>{<CFRunLoopSource MIG Server>}
　　<CFRunLoopSource>{<CFRunLoopSource MIG Server>}
　　<CFRunLoopSource>{callout = PurpleEventCallback}
)

observers
(
<CFRunLoopObserver>{activities = 0x1, repeats = Yes, callout = _wrapRunLoopWithAutoreleasePoolHandler}
<CFRunLoopObserver>{activities = 0x20, repeats = Yes, callout = _UIGestureRecognizerUpdateObserver}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _beforeCACommitHandler}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _afterCACommitHandler}
<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _wrapRunLoopWithAutoreleasePoolHandler}
)

timers
(
　　<CFRunLoopTimer>{callout = _ZN2CAL14timer_callbackEP16__CFRunLoopTimerPv},
)

2) <CFRunLoopMode>{name = GSEventReceiveRunLoopMode, port set = 0x2d03, queue =, source =, timer port = 0x5303}

sources0
(
　　<CFRunLoopSource>{callout = PurpleEventSignalCallback}
)

sources1
(
　　<CFRunLoopSource>{callout = PurpleEventCallback}
)

3) <CFRunLoopMode>{name = kCFRunLoopDefaultMode, port set = 0x1b03, queue =, source =, timer port = 0x2503}

sources1
(
　　<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 17927, subsystem =, context = 0x0}}
　　<CFRunLoopSource>{callout = _ZL27change_notify_port_callbackP12__CFMachPortPvlS1_}
　　<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 22535, subsystem =, context =}}
　　<CFRunLoopSource>{<CFRunLoopSource MIG Server> {port = 40455, subsystem =, context =}}
　　<CFRunLoopSource>{callout = PurpleEventCallback}
)

observers
(
　　<CFRunLoopObserver>{activities = 0x1, repeats = Yes, callout = _wrapRunLoopWithAutoreleasePoolHandler}
　　<CFRunLoopObserver>{activities = 0x20, repeats = Yes, callout = _UIGestureRecognizerUpdateObserver}
　　<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _beforeCACommitHandler}
　　<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv}
　　<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _afterCACommitHandler}
　　<CFRunLoopObserver>{activities = 0xa0, repeats = Yes, callout = _wrapRunLoopWithAutoreleasePoolHandler
)

timers
(
　　<CFRunLoopTimer>{callout = _ZN2CAL14timer_callbackEP16__CFRunLoopTimerPv}
)

4) <CFRunLoopMode]>{name = kCFRunLoopCommonModes, port set = 0x470f, queue =, source =, timer port = 0xa907}

观察者

typedef enum CFRunLoopActivity : CFOptionFlags {

    kCFRunLoopEntry = (1UL << 0),

    kCFRunLoopBeforeTimers = (1UL << 1),

    kCFRunLoopBeforeSources = (1UL << 2),

    kCFRunLoopBeforeWaiting = (1UL << 5),

    kCFRunLoopAfterWaiting = (1UL << 6),

    kCFRunLoopExit = (1UL << 7),

    kCFRunLoopAllActivities = 0x0FFFFFFFU

} CFRunLoopActivity;

<<<<<<主线程RunLoop 用到的 Activity>>>>>>

0x01 == 00000001 ===>>> kCFRunLoopEntry

0x20 == 00100000 ===>>> kCFRunLoopBeforeWaiting

0xa0 == 10100000 ===>>> kCFRunLoopBeforeWaiting | kCFRunLoopExit

autorelease pool : _wrapRunLoopWithAutoreleasePoolHandler: 主消息循环在进入和等待或者退出注册了handler，来处理自动释放池