Mercurial > hg > CbC > CbC_gcc
diff libgomp/testsuite/libgomp.c/omp_workshare2.c @ 0:a06113de4d67
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author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
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date | Fri, 17 Jul 2009 14:47:48 +0900 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libgomp/testsuite/libgomp.c/omp_workshare2.c Fri Jul 17 14:47:48 2009 +0900 @@ -0,0 +1,64 @@ +/****************************************************************************** +* FILE: omp_workshare2.c +* DESCRIPTION: +* OpenMP Example - Sections Work-sharing - C/C++ Version +* In this example, the OpenMP SECTION directive is used to assign +* different array operations to threads that execute a SECTION. Each +* thread receives its own copy of the result array to work with. +* AUTHOR: Blaise Barney 5/99 +* LAST REVISED: 04/06/05 +******************************************************************************/ +#include <omp.h> +#include <stdio.h> +#include <stdlib.h> +#define N 50 + +int main (int argc, char *argv[]) { + +int i, nthreads, tid; +float a[N], b[N], c[N]; + +/* Some initializations */ +for (i=0; i<N; i++) + a[i] = b[i] = i * 1.0; + +#pragma omp parallel shared(a,b,nthreads) private(c,i,tid) + { + tid = omp_get_thread_num(); + if (tid == 0) + { + nthreads = omp_get_num_threads(); + printf("Number of threads = %d\n", nthreads); + } + printf("Thread %d starting...\n",tid); + + #pragma omp sections nowait + { + #pragma omp section + { + printf("Thread %d doing section 1\n",tid); + for (i=0; i<N; i++) + { + c[i] = a[i] + b[i]; + printf("Thread %d: c[%d]= %f\n",tid,i,c[i]); + } + } + + #pragma omp section + { + printf("Thread %d doing section 2\n",tid); + for (i=0; i<N; i++) + { + c[i] = a[i] * b[i]; + printf("Thread %d: c[%d]= %f\n",tid,i,c[i]); + } + } + + } /* end of sections */ + + printf("Thread %d done.\n",tid); + + } /* end of parallel section */ + + return 0; +}