generalize call to NSLog

I am tying to generalize calling NSLog and avoid having to comment-out the calls when I am finished debugging.

I have:

#define USE_ADLog 0
#define USE_RPLog 0
#define USE_DLLog 1

void ConsoleADLog(NSString *message, ...);
void ConsoleRPLog(NSString *message, ...);
void ConsoleDLLog(NSString *message, ...);

and, for example:

void ConsoleADLog(NSString *message, ...) {

#if (USE_ADLog)
    va_list optionalArgs;

    va_start(optionalArgs, message);   // after the parm = message
    va_end(optionalArgs);

    NSLog(message, optionalArgs);
#endif
}

So far, so good ... however, as soon as I call, for example,:

   ConsoleDLLog(@"parm1 = %@, parm2 = %@", parm1, parm2);

which call is inside a secondary thread, I bomb. I thought?? that va_start, va_end were thread safe.

... or is the problem %@ ... I know %f works ???

Apparently not!, so how do I make them thread safe ... plain ole

NSLog(@"whatever %@", whateverParm)

wor开发者_如何转开发ks, but not the function above.

Thanks,

this is why many variadic functions include variants which accept va_lists.

see NSLogv.

#if DEBUG == 0
#define DebugLog(...)
#elif DEBUG == 1
#define DebugLog(...) NSLog(__VA_ARGS__)
#endif

Then invoke it using DebugLog(@"Uh oh: %@", someArgument);. If DEBUG is set to 1, the preprocessor will emit NSLog(@"Uh oh: %@", someArgument);. If it's set to 0, it will not emit anything.