Get CurrentTrack Information of iTunes(OS X) in Objective-C. (I'm not an Objective-C programmer maybe this code is wrong.)

iTunes.mm

#include <stdlib.h>
#include <stdbool.h>
// You can generate iTunes.h as follows:
// $ sdef /Applications/iTunes.app | sdp -fh --basename iTunes
#import "iTunes.h"

// For ABI
extern "C" {
  struct Music {
    const char* name;
    const char* album;
    const char* artist;
  };

  bool checkiTunesIsRunning() {
    return [[SBApplication applicationWithBundleIdentifier:@"com.apple.iTunes"] isRunning];
  }

  struct Music* getCurrentiTunesPlay() {
    iTunesApplication* iTunes;
    iTunesTrack* current;
    struct Music* music = NULL;

    if (!checkiTunesIsRunning()) {
      return music;
    }

    music = (Music*)malloc(sizeof(Music));

    iTunes  = [SBApplication applicationWithBundleIdentifier:@"com.apple.iTunes"];
    current = [iTunes currentTrack];

    music->name   = [[current name] UTF8String];
    music->album  = [[current album] UTF8String];
    music->artist = [[current artist] UTF8String];

    return music;
  }
}

// Test
/*
int main() {
  struct Music* music;

  music = getCurrentiTunesPlay();

  if (music == NULL) {
    printf("[Fatal Error] - iTunes is not running\n");
    return -1;
  }

  printf("name:   %s\n", music->name);
  printf("album:  %s\n", music->album);
  printf("artist: %s\n", music->artist);
  
  free(music);
}
*/