omp_get_num_threads

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Returns the number of threads in the parallel region.

Syntax

int omp_get_num_threads( );  

Remarks

For more information, see 3.1.2 omp_get_num_threads Function.

Example

// omp_get_num_threads.cpp  
// compile with: /openmp  
#include <stdio.h>  
#include <omp.h>  
  
int main()  
{  
    omp_set_num_threads(4);  
    printf_s("%d\n", omp_get_num_threads( ));  
    #pragma omp parallel  
        #pragma omp master  
        {  
            printf_s("%d\n", omp_get_num_threads( ));  
        }  
  
    printf_s("%d\n", omp_get_num_threads( ));  
  
    #pragma omp parallel num_threads(3)  
        #pragma omp master  
        {  
            printf_s("%d\n", omp_get_num_threads( ));  
        }  
  
    printf_s("%d\n", omp_get_num_threads( ));  
}  

1  
4  
1  
3  
1  

See Also

Functions