How do I ask OpenMP to create threads only once at each run of the program?

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C

multi-threading

Hi,
I am trying to parallelize a large program that is written by a third-party. I cannot disclose the code, but I will try and give the closest example of what I wish to do.
Based on the code below. As you can see, since the clause "parallel" is INSIDE the while loop, the creation/destruction of the threads are(is) done with each iteration, which is costly.
Given that I cannot move the Initializors...etc to be outside the "while" loop.

--Base code

void funcPiece0()
{
	// many lines and branches of code
}


void funcPiece1()
{
	// also many lines and branches of code
}

void funcCore()
{
	funcInitThis();
	funcInitThat();

#pragma omp parallel
	{
#pragma omp sections
		{
#pragma omp section
			{
				funcPiece0();
			}//omp section
#pragma omp section
			{
				funcPiece1();
			}//omp section
		}//omp sections
	}//omp parallel

}

int main()
{

	funcInitThis();
	funcInitThat();
#pragma omp parallel
    {
	while(1)
	{
		funcCore();
	}
    }

}

What I seek to do is to avoid the creation/destruction per-iteration, and make it once at the start/end of the program. I tried many variations to the displacement of the "parallel" clause. What I basically has the same essence is the below: (ONLY ONE thread creation/destruction per-program run)
--What I tried, but failed "illegal access" in the initializing functions.

void funcPiece0()
{
	// many lines and branches of code
}


void funcPiece1()
{
	// also many lines and branches of code
}

void funcCore()
{
	funcInitThis();
	funcInitThat();

//#pragma omp parallel
//	{
#pragma omp sections
		{
#pragma omp section
			{
				funcPiece0();
			}//omp section
#pragma omp section
			{
				funcPiece1();
			}//omp section
		}//omp sections
//	}//omp parallel

}

int main()
{

	funcInitThis();
	funcInitThat();

	while(1)
	{
		funcCore();
	}

}

--

Any help would be highly appreciated!
Thanks!

p.s. I see no tag for OpenMP...?