Function pthread_cancel

include/hamlib/winpthreads.h:604–643

static int pthread_cancel(pthread_t t)
{
	if (t->p_state & PTHREAD_CANCEL_ASYNCHRONOUS)
	{
		/* Dangerous asynchronous cancelling */
		CONTEXT ctxt;

		/* Already done? */
		if (t->cancelled) return ESRCH;

		ctxt.ContextFlags = CONTEXT_CONTROL;

		SuspendThread(t->h);
		GetThreadContext(t->h, &ctxt);
#ifdef _M_X64
		ctxt.Rip = (uintptr_t) _pthread_invoke_cancel;
#else
		ctxt.Eip = (uintptr_t) _pthread_invoke_cancel;
#endif
		SetThreadContext(t->h, &ctxt);

		/* Also try deferred Cancelling */
		t->cancelled = 1;

		/* Notify everyone to look */
		_InterlockedIncrement(&_pthread_cancelling);

		ResumeThread(t->h);
	}
	else
	{
		/* Safe deferred Cancelling */
		t->cancelled = 1;

		/* Notify everyone to look */
		_InterlockedIncrement(&_pthread_cancelling);
	}

	return 0;
}

static unsigned _pthread_get_state(pthread_attr_t *attr, unsigned flag)
{