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(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)


A variable controlling whether SDL uses Critical Sections for mutexes on Windows.

Header File

Defined in <SDL3/SDL_hints.h>




On Windows 7 and newer, Slim Reader/Writer Locks are available. They offer better performance, allocate no kernel resources and use less memory. SDL will fall back to Critical Sections on older OS versions or if forced to by this hint.

The variable can be set to the following values:

This hint should be set before SDL is initialized.


This hint is available since SDL 3.0.0.

CategoryAPI, CategoryAPIMacro, CategoryHints

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