[M3devel] pthread_join?

[Jay K]

Should we use pthread_join?
http://pubs.opengroup.org/onlinepubs/9699919799/functions/pthread_join.html

"it is a convenience and you can do X"
And we do that X.
I ask for one or two reasons.
In making ThreadWin32.m3 resemble ThreadPThread.m3 more, there is usually no loss of efficiency.However this is an area where I percieve, just from the design/implementation, some loss.
So, wondering..I noticed pthread_join exists.
I suspect if we used pthread_join, then both Win32 could still resemble pthread, but regain the efficiency.In particular, so that multiple independent joins do not contend on the same mutex.
Is there the problem of:
http://man7.org/linux/man-pages/man3/pthread_join.3.html
" Joining with a thread that has previously been joined results in       undefined behavior."
yes we want it to be well defined to raise an exception?Thoughts?
 - Jay
 		 	   		  
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