omp sections

Defines a region of structured blocks that will be distributed among the threads in a team.

Syntax

#pragma omp sections [clause,clause , ...]

[!$omp section]

structured-block

[!$omp section]

structured-block

...

Arguments

clause

Can be one or more of the following clauses:

firstprivate(list)
lastprivate(list)
nowait
private(list)
reduction(operator:list)

Description

The sections construct encloses a set of structured-block sections that will be run in parallel. The sections constructs are executed once by a thread in a team.

Example: Searching in parallel using three different methods
#include <omp.h> int found_method1, found_method2, found_method3; #pragma omp parallel num_threads(3) { #pragma omp sections { #pragma omp section found_method1 = method1_search(); #pragma omp section found_method2 = method2_search(); #pragma omp section found_method3 = method3_search(); } } if (found_method1) { printf(“Found with method 1\n”); } if (found_method2) { printf(“Found with method 2\n”); } if (found_method3) { printf(“Found with method 3\n”); }

Example: Searching in parallel using three different methods

#include <omp.h>
int found_method1, found_method2, found_method3;

#pragma omp parallel num_threads(3) {
 	#pragma omp sections {
	  	#pragma omp section
		  found_method1 = method1_search();

		  #pragma omp section
  		found_method2 = method2_search();

		  #pragma omp section
		  found_method3 = method3_search();
	 }
}
if (found_method1) { printf(“Found with method 1\n”); }
if (found_method2) { printf(“Found with method 2\n”); }
if (found_method3) { printf(“Found with method 3\n”); }