Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_GetWindowSurfaceVSync - Get VSync for the window surface.
SYNOPSIS
#include <SDL3/SDL_video.h>
bool SDL_GetWindowSurfaceVSync(SDL_Window *window, int *vsync);
FUNCTION PARAMETERS
window the window to query.
vsync an int filled with the current vertical refresh sync interval. See SDL_SetWindowSurfaceVSync() for
the meaning of the value.
RETURN VALUE
for more information.
THREAD SAFETY
This function should only be called on the main thread.
AVAILABILITY
This function is available since SDL 3.2.0.
SEE ALSO
SDL_SetWindowSurfaceVSync(3)
Simple Directmedia Layer SDL 3.2.20 SDL_GetWindowSurfaceVSync(3)