SDL_WasInit
Use this function to get a mask of the specified subsystems which have previously been initialized.
Contents
Syntax
Uint32 SDL_WasInit(Uint32 flags)
Function Parameters
Return Value
If flags is 0 it returns a mask of all initialized subsystems, otherwise it returns the initialization status of the specified subsystems.
The return value does not include SDL_INIT_NOPARACHUTE.
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");
}
Remarks
These are the flags which may be passed to SDL_WasInit() and may be OR'd together to query multiple subsystems simultaneously.
SDL_INIT_TIMER |
timer subsystem |
SDL_INIT_AUDIO |
audio subsystem |
SDL_INIT_VIDEO |
video subsystem; automatically initializes the events subsystem |
SDL_INIT_JOYSTICK |
joystick subsystem; automatically initializes the events subsystem |
SDL_INIT_HAPTIC |
haptic (force feedback) subsystem |
SDL_INIT_GAMECONTROLLER |
controller subsystem; automatically initializes the joystick subsystem |
SDL_INIT_EVENTS |
events subsystem |
SDL_INIT_EVERYTHING |
all of the above subsystems |
SDL_INIT_NOPARACHUTE |
compatibility; this flag is ignored |
