mirror of
https://github.com/OpenMP/Examples.git
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46 lines
675 B
C
46 lines
675 B
C
/*
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* @@name: atomic.1c
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* @@type: C
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* @@compilable: yes
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* @@linkable: yes
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* @@expect: success
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*/
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float work1(int i)
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{
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return 1.0 * i;
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}
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float work2(int i)
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{
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return 2.0 * i;
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}
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void atomic_example(float *x, float *y, int *index, int n)
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{
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int i;
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#pragma omp parallel for shared(x, y, index, n)
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for (i=0; i<n; i++) {
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#pragma omp atomic update
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x[index[i]] += work1(i);
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y[i] += work2(i);
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}
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}
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int main()
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{
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float x[1000];
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float y[10000];
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int index[10000];
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int i;
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for (i = 0; i < 10000; i++) {
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index[i] = i % 1000;
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y[i]=0.0;
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}
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for (i = 0; i < 1000; i++)
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x[i] = 0.0;
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atomic_example(x, y, index, 10000);
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return 0;
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}
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