Edited to add:
C++, GCC 3.4.1, MDK 10.1.
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I have created a function like:

#include <sys/types.h>
#include <linux/unistd.h>

_syscall0( pid_t, gettid )

int myGetTID( void )
{
return gettid();
}


This won't work correctly because where ever the _syscall0( pid_t, gettid) is called, it appears to create a static function gettid() that returns the pid_t of the "thread" it was called in. So, if I statically declare this in a header file, inlined, it will always return the PID of the parent process/first thread.

I can probably make a macro, and inline it all, but I was wondering if there is any "magic" I could use to put this in one area (besides a macro) and have it return the correct result.

Found a better way, that is to create a class within the class you're debugging:

class ThreadDebug
{
public:
int _thread_id;
ThreadDebug( _thread_id = gettid(); );
private:
_syscall0( pid_t, gettid)
};

ThreadDebug _thread_info


_thread_info->_thread_id // Yes, not object oriented, but I had problems with doing a call back function in a multi-threaded environment and trying to use cout