[ECOS] waiting for a thread to terminate

[ECOS] waiting for a thread to terminate

[Øyvind Harboe]

I was wondering if this scheme is legal/recommended on eCos
when waiting for a thread to terminate. It seems to work fine:

struct args
{
	cyg_handle_t caller;
};

static void invoker(cyg_addrword_t userData)
{
	args *a=(args *)userData;

	doWork();
	
	
	// once the thread runs off the end of the universe, the scheduler is
	// unlocked => it is not necessary to unlock the scheduler from 
	// the "caller" thread below.
	cyg_scheduler_lock(); 
	cyg_thread_resume(a->caller);
}


void foo()
{
	....
	cyg_thread_create(0,
	invoker,
	(cyg_addrword_t)&a,
	"stack expander",
	stack.get(),
	stackSize,
	&threadHandle,
	&thread);
	
	// start thread
	cyg_thread_resume(threadHandle);
	
	doSomethingElse();

	setThreadTerminateFlag();

	// at this point we will do nothing but wait for the other
	// thread to complete.

	// we'll be resumed by the thread above
	cyg_thread_suspend(a.caller);

	if (!cyg_thread_delete(threadHandle))
	{
		CYG_FAIL("Thread should be terminated by now");
	}
}


-- 
Øyvind Harboe
http://www.zylin.com



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