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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libgomp/testsuite/libgomp.c/omp_hello.c
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+/******************************************************************************
+* FILE: omp_hello.c
+* DESCRIPTION:
+* OpenMP Example - Hello World - C/C++ Version
+* In this simple example, the master thread forks a parallel region.
+* All threads in the team obtain their unique thread number and print it.
+* The master thread only prints the total number of threads. Two OpenMP
+* library routines are used to obtain the number of threads and each
+* thread's number.
+* AUTHOR: Blaise Barney 5/99
+* LAST REVISED: 04/06/05
+******************************************************************************/
+#include <omp.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main (int argc, char *argv[]) {
+
+int nthreads, tid;
+
+/* Fork a team of threads giving them their own copies of variables */
+#pragma omp parallel private(nthreads, tid)
+ {
+
+ /* Obtain thread number */
+ tid = omp_get_thread_num();
+ printf("Hello World from thread = %d\n", tid);
+
+ /* Only master thread does this */
+ if (tid == 0)
+ {
+ nthreads = omp_get_num_threads();
+ printf("Number of threads = %d\n", nthreads);
+ }
+
+ } /* All threads join master thread and disband */
+
+ return 0;
+}