Re: Thread question

[Richard Frith-Macdonald]

On 1 Mar 2011, at 17:55, Banlu Kemiyatorn wrote:

> Hi,
> I need help on NSThread, Here,s the code
> 
> @implementation MyObj
> - (void) launch
> {
>       // id p = [NSAutoreleasePool new];
>        NSLog(@"x");
>        //[p release];
> }
> @end
> 
> int main (int argc, const char * argv[]) {
>        id p = [NSAutoreleasePool new];
> 
>        id obj = [MyObj new];
>        [NSThread detachNewThreadSelector:@selector(launch)
> toTarget:obj withObject:nil];
>        [NSThread detachNewThreadSelector:@selector(launch)
> toTarget:obj withObject:nil];
>   /* some sleep */
> 
> 
> I got
>  Uncaught exception NSLockException, reason: failed to unlock mutex
> But if I NSLock NSLog, it will log 2 "x"
> Does this mean NSLog isn't thread-safe? or what do I miss?

NSLog should be thread-safe.

The code you provide is incomplete and certainly won't even compile, so we 
can't really tell what your problem might be.

Please write a complete testcase demonstrating what your problem is...

You can get the latest gnustep-make from svn trunk and try 'gnustep-tests 
--help' to get started ...
There are example tests in $GNUSTEP_MAKEFILES/TestFramework