mirror of
https://github.com/OpenMP/Examples.git
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35 lines
751 B
C
35 lines
751 B
C
/*
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* @@name: acquire_release.3.c
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* @@type: C
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* @@compilable: yes, omp_5.0
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* @@linkable: yes
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* @@expect: success
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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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{
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int x = 0, y = 0;
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#pragma omp parallel num_threads(2)
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{
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int thrd = omp_get_thread_num();
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if (thrd == 0) {
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x = 10;
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#pragma omp flush // or with acq_rel or release clause
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#pragma omp atomic write // or with relaxed clause
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y = 1;
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} else {
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int tmp = 0;
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while (tmp == 0) {
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#pragma omp atomic read // or with relaxed clause
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tmp = y;
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}
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#pragma omp flush // or with acq_rel or acquire clause
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printf("x = %d\n", x); // always "x = 10"
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}
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}
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return 0;
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}
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