[Omp] Shared Variable Problem

[KaveH Aasaraai]

Hey guys,

I'm new to this OpenMP thing. I'm facing this problem
of using a shared value, and trying to synchronize two
threads with this shared variable. Any help would
really be appreciated. Here is the problem:

i = 0;

#pragma omp parallel private(tid)
tid = omp_get_thread_num();
while(1)
{
	if (!tid)
	{
		printf("master: i = %d\n", i);
		fflush(stdout);
	}
	else
	{
		printf("worker: i = %d\n", i);
		fflush(stdout);
		i ++;
	}
}

The "0" thread doesn't see the changes to the shared
variable, i. If I remove the while(1) thing, then the
value printed for "i" is correct. Here is a sample
(partial) output:


master: i = 0
master: i = 0
master: i = 0
worker: i = 2445
worker: i = 2446
worker: i = 2447
worker: i = 2448
worker: i = 2449
worker: i = 2450
worker: i = 2451
worker: i = 2452



Thanks to you guys in advance,

Kaveh

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