d67c91b5e7
While loop within task priority code did not have necessary update of variable which could lead to hangs if two threads collided when both attempted to execute the compare_and_exchange. Fixes: https://github.com/llvm/llvm-project/issues/62867 Differential Revision: https://reviews.llvm.org/D151138
34 lines
626 B
C
34 lines
626 B
C
// RUN: %libomp-compile && env OMP_MAX_TASK_PRIORITY=42 %libomp-run
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#include <stdio.h>
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#include <stdlib.h>
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#include <omp.h>
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int a = 0;
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int main(void) {
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int i;
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int max_task_priority = omp_get_max_task_priority();
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if (max_task_priority != 42) {
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fprintf(stderr,
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"error: omp_get_max_task_priority() returned %d instead of 42\n",
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max_task_priority);
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exit(EXIT_FAILURE);
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}
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for (i = 0; i < 250; ++i) {
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#pragma omp parallel
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{
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#pragma omp task priority(42)
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{
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#pragma omp atomic
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a++;
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}
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}
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}
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printf("a = %d\n", a);
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return EXIT_SUCCESS;
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}
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