Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_GetWindowSurfaceVSync - Get VSync for the window surface.
HEADER FILE
Defined in SDL3/SDL_video.h
SYNOPSIS
#include "SDL3/SDL.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
Returns true on success or false on failure; call SDL_GetError () 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
•(3), SDL_SetWindowSurfaceVSync(3) Simple Directmedia Layer SDL 3.2.8 SDL_GetWindowSurfaceVSync(3)