Subj : src/xpdev/rwlockwrap.c rwlockwrap.h
To   : Git commit to main/sbbs/master
From : Deucе
Date : Thu Jan 18 2024 17:05:50

https://gitlab.synchro.net/main/sbbs/-/commit/514480151f5e2d1093ed3418
Modified Files:
	src/xpdev/rwlockwrap.c rwlockwrap.h
Log Message:
Add a pair of condition variables to help avoid spinning.

Instead of tight loops with 1ms Sleep()s in them, add events for
zero readers and zero writers that we can wait for instead.

Unfortunately, since Events aren't interlocked with a critical section
like condition variables are with mutexes in pthreads, we can't
rely on this for race-free code, so for read locks, we still may
spin under write pressure.
--- SBBSecho 3.20-Linux
 * Origin: Vertrauen - [vert/cvs/bbs].synchro.net (1:103/705)

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