gistfile1.m

#include <CoreFoundation/CoreFoundation.h>

int main(int argc, const char * argv[])
{
    CFStringRef string;
    string = CFStringCreateWithCString(kCFAllocatorDefault,
                                       "Core Foundation",
                                       kCFStringEncodingUTF8);
    printf("%ld\n",CFGetRetainCount(string));
    
    CFRetain(string);
    printf("%ld\n",CFGetRetainCount(string));
    
    CFRelease(string);
    printf("%ld\n",CFGetRetainCount(string));
    
    CFRelease(string);
    
    return 0;
}

 実行結果
 1
 2
 1