mirror of
https://github.com/OpenMP/Examples.git
synced 2025-04-21 13:21:22 +01:00
42 lines
781 B
C
42 lines
781 B
C
/*
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* @@name: mem_model.1c
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* @@type: C
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* @@compilable: yes
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* @@linkable: yes
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* @@expect: rt-error
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* @@version: omp_3.1
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*/
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#include <stdio.h>
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#include <omp.h>
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int main(){
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int x;
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x = 2;
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#pragma omp parallel num_threads(2) shared(x)
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{
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if (omp_get_thread_num() == 0) {
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#pragma omp atomic write
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x = 5;
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} else {
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int xval;
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#pragma omp atomic read
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xval = x;
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/* Print 1: xval can be 2 or 5 */
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printf("1: Thread# %d: x = %d\n", omp_get_thread_num(), xval);
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}
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#pragma omp barrier
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if (omp_get_thread_num() == 0) {
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/* Print 2 */
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printf("2: Thread# %d: x = %d\n", omp_get_thread_num(), x);
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} else {
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/* Print 3 */
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printf("3: Thread# %d: x = %d\n", omp_get_thread_num(), x);
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}
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}
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return 0;
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}
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