在 2019/7/2 下午8:00, Jonathan Wakely 写道: > The C++ standard says: > > "The library may reuse the value of a thread::id of a terminated > thread that can no longer be joined." > > So that's not a reason to use a handle.
According to MSDN [1] a thread ID is valid 'until the thread has been terminated' so I presume a terminated but unclosed thread does not have a thread ID. This could also mean that there is no effect way to denote a thread uniquely. As a consequence libstdc++ may have to its own bookkeeping mechanism. [1] https://docs.microsoft.com/en-us/windows/desktop/ProcThread/thread-handles-and-identifiers -- Best regards, LH_Mouse
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