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Allow usage of the new Condition Variable code with Critical Sections

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Vista and later provide the SleepConditionVariableCS() function for this.

Since SDL_syscond_srw.c doesn't require SRW locks anymore, rename it to
SDL_syscond_cv.c which better reflects the implementation of condition
variables rather than the implementation of mutexes.

Fixes #4051.
This commit is contained in:
Cameron Gutman
2021-08-23 21:16:58 -04:00
committed by Ryan C. Gordon
parent 44ab04fc63
commit 5dccffd7e4
7 changed files with 77 additions and 63 deletions
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3
include/SDL_hints.h
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@@ -1547,9 +1547,6 @@ extern "C" {
* They offer better performance, allocate no kernel ressources and
* use less memory. SDL will fall back to Critical Sections on older
* OS versions or if forced to by this hint.
* This also affects Condition Variables. When SRW mutexes are used,
* SDL will use Windows Condition Variables as well. Else, a generic
* SDL_cond implementation will be used that works with all mutexes.
*
* This variable can be set to the following values:
* "0" - Use SRW Locks when available. If not, fall back to Critical Sections. (default)