Am 22.08.2020 um 02:44 schrieb Martin via fpc-devel:
I am tracing a race condition in lazCollections TLazThreadedQueue
on win-64
What is supposed to happen in the following case:
2 or more threads are waiting on the some event
RTLeventWaitFor(UniqueEvent)
1 thread sets it
RTLeventSetEvent(UniqueEvent)
I expect that wakes up exactly ONE thread (never mind wich)?
Or ALL?
If no one resets the event (NO call to RTLeventResetEvent), then that
does not change anything? It is still just the one thread that got
woken up?
On Windows these are direct calls to the WinAPI functions
WaitForSingleObject and SetEvent (and the created event is an Auto Reset
Event), so you should probably take a look at the MSDN documentation for
them...
Regards,
Sven
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