Richard Frith-Macdonald wrote:
On 6 Jan 2008, at 17:19, David Wetzel wrote:
Hi,
objc_thread_detach (@selector(hash), o, nil);
returns NULL on all boxes. Also on NetBSD 3.1 where NSThread is
working with GNUstep.
Any Ideas?
I don't see how that's possible unless you are linking something wrong
... if objc_thread_detach() returns NULL then NSThread cannot work ...
It doesn't actually return NULL on NetBSD 3.1. There seems to be a
promotion/printf issue, undefined behavior or some serious bug. For:
printf("return value is %p %d\n int:%d retval:%d NULL:%d, COMP:%d\n",
retval, (retval == NULL),
sizeof(int), sizeof(retval),
sizeof(NULL), sizeof(retval==NULL));
I get:
return value is 0xbb000000 0
int:4 retval:4 NULL:4, COMP:4
since it is based on objc_thread_detach() and will raise an exception if
that returns NULL (since NULL is the error return from that function ...
not a great piece of design, but it's what the objc runtime provides).
But on the 4.0 version we really get 0x0. Now I'll poke a bit but I
think Dave W. will actually have to install a debug version of
gcc/libobjc for me to figure out what's going on here.
Cheers,
David
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