| 1 | // RUN: %libomp-compile-and-run |
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| 2 | #include <stdio.h> |
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| 3 | #include "omp_testsuite.h" |
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| 4 | |
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| 5 | /* |
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| 6 | * Test if the compiler supports nested parallelism |
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| 7 | * By Chunhua Liao, University of Houston |
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| 8 | * Oct. 2005 |
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| 9 | */ |
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| 10 | int test_omp_nested() |
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| 11 | { |
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| 12 | #ifdef _OPENMP |
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| 13 | if (omp_get_max_threads() > 4) |
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| 14 | omp_set_num_threads(4); |
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| 15 | if (omp_get_max_threads() < 2) |
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| 16 | omp_set_num_threads(2); |
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| 17 | #endif |
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| 18 | |
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| 19 | int counter = 0; |
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| 20 | #ifdef _OPENMP |
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| 21 | omp_set_nested(1); |
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| 22 | omp_set_max_active_levels(omp_get_supported_active_levels()); |
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| 23 | #endif |
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| 24 | |
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| 25 | #pragma omp parallel shared(counter) |
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| 26 | { |
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| 27 | #pragma omp critical |
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| 28 | counter++; |
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| 29 | #pragma omp parallel |
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| 30 | { |
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| 31 | #pragma omp critical |
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| 32 | counter--; |
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| 33 | } |
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| 34 | } |
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| 35 | return (counter != 0); |
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| 36 | } |
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| 37 | |
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| 38 | int main() |
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| 39 | { |
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| 40 | int i; |
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| 41 | int num_failed=0; |
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| 42 | |
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| 43 | for(i = 0; i < REPETITIONS; i++) { |
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| 44 | if(!test_omp_nested()) { |
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| 45 | num_failed++; |
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| 46 | } |
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| 47 | } |
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| 48 | return num_failed; |
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| 49 | } |
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| 50 | |
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