A Handy Thread Synchronization Object Chart

本文链接：https://blog.youkuaiyun.com/HoBoss/article/details/2153243

本文总结了不同内核对象在进程同步中的行为特性，包括进程、线程、作业、文件等对象的状态转换及其对等待线程的影响。此外还详细介绍了各种事件、信号量、互斥量及临界区等同步原语的工作机制。

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The following chart summarizes how the various kernel objects behave with respect to thread synchronization.

Object	When Nonsignaled	When Signaled	Successful Wait Side Effect
Process	While process is still active	When process terminates (ExitProcess, TerminateProcess)	None
Thread	While thread is still active	When thread terminates (ExitThread, TerminateThread)	None
Job	When job's time has not expired	When job time expires	None
File	When I/O request is pending	When I/O request completes	None
Console input	No input exists	When input is available	None
File change notifications	No files have changed	When file system detects changes	Resets notification
Auto-reset event	ResetEvent, PulseEvent, or successful wait	When SetEvent/PulseEvent is called	Resets event
Manual-reset event	ResetEvent or PulseEvent	When SetEvent/PulseEvent is called	None
Auto-reset waitable timer	CancelWaitableTimer or successful wait	When time comes due (SetWaitableTimer)	Resets timer
Manual-reset waitable timer	CancelWaitableTimer	When time comes due (SetWaitableTimer)	None
Semaphore	Successful wait	When count > 0 (ReleaseSemaphore)	Decrements count by 1
Mutex	Successful wait	When unowned by a thread (ReleaseMutex)	Gives ownership to thread
Critical section (user-mode)	Successful wait ((Try)EnterCriticalSection)	When unowned by a thread (LeaveCriticalSection)	Gives ownership to thread

Interlocked (user-mode) functions never cause a thread to be unschedulable; they alter a value and return immediately.