critical Directive

Specifies that the structured block is restricted to execution on a single thread at a time.

Binding thread set: all threads

Format

#pragma omp critical [(name)] newline
structured block

Example

int dequeue(float *a);
void work(int i, float *a);

void a13(float *x, float *y)
{
   int ix_next, iy_next;

   #pragma omp parallel shared(x, y) private(ix_next, iy_next)
   {
      #pragma omp critical (xaxis)
         ix_next = dequeue(x);
      work(ix_next, x);

      #pragma omp critical (yaxis)
         iy_next = dequeue(y);
      work(iy_next, y);
   }
}