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


Get a mask of the specified subsystems which are currently initialized.


Uint32 SDL_WasInit(Uint32 flags);

Function Parameters


any of the flags used by SDL_Init(); see SDL_Init for details.

Return Value

Returns a mask of all initialized subsystems if flags is 0, otherwise it returns the initialization status of the specified subsystems.

The return value does not include SDL_INIT_NOPARACHUTE.


This function is available since SDL 3.0.0.

Code Examples

/* Get init data on all the subsystems */
Uint32 subsystem_init;

subsystem_init = SDL_WasInit(SDL_INIT_EVERYTHING);

if (subsystem_init & SDL_INIT_VIDEO) {
    printf("Video is initialized.\n");
} else {
    printf("Video is not initialized.\n");
/* Just check for one specific subsystem */

if (SDL_WasInit(SDL_INIT_VIDEO) != 0) {
    printf("Video is initialized.\n");
} else {
    printf("Video is not initialized.\n");
/* Check for two subsystems */
Uint32 subsystem_mask = SDL_INIT_VIDEO | SDL_INIT_AUDIO;

if (SDL_WasInit(subsystem_mask) == subsystem_mask) {
    printf("Video and Audio initialized.\n");
} else {
    printf("Video and Audio not initialized.\n");

CategoryAPI, CategoryInit

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