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Re: [openacc] adjust default num_gangs

On Wed, Nov 02, 2016 at 03:11:52PM -0700, Cesar Philippidis wrote:
>    if (seen_zero)
>      {
> +      /* See if the user provided GOMP_OPENACC_DIM environment
> +	 variable to specify runtime defaults. */
> +      static int default_dims[GOMP_DIM_MAX];
> +
> +      pthread_mutex_lock (&ptx_dev_lock);

I think pthread_once would be better here, with the default_dims
initialization outlined into a separate helper function.

	Jakub
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