# SDL_GUARDED_BY Wrapper around Clang thread safety analysis annotations. ## Header File Defined in [](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_mutex.h) ## Syntax ```c #define SDL_GUARDED_BY(x) \ SDL_THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x)) ``` ## Remarks Please see https://clang.llvm.org/docs/ThreadSafetyAnalysis.html#mutex-h ## Version This macro is available since SDL 3.2.0. ---- [CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro), [CategoryMutex](CategoryMutex)