Manpages - SDL_WasInit.3

SDL_WasInit - Check which subsystems are initialized

#include “SDL.h”

Uint32 SDL_WasInit*(*Uint32 flags);

SDL_WasInit allows you to see which SDL subsytems have been initialized. flags is a bitwise OR’d combination of the subsystems you wish to check (see SDL_Init for a list of subsystem flags).

SDL_WasInit returns a bitwised OR’d combination of the initialized subsystems.

  /* Here are several ways you can use SDL_WasInit() */

  /* 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.
  ");
  else
    printf("Video is not initialized.
  ");



  /* Just check for one specfic subsystem */

  if(SDL_WasInit(SDL_INIT_VIDEO)!=0)
    printf("Video is initialized.
  ");
  else
    printf("Video is not initialized.
  ");




  /* 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.
  ");
  else
    printf("Video and Audio not initialized.
  ");

SDL_Init, SDL_Subsystem