Last change
on this file since d414664 was
51493a4,
checked in by Peter A. Buhr <pabuhr@…>, 5 years ago
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start directory for full-contention mutex tests
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-
Property mode set to
100644
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File size:
857 bytes
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1 | #include <pthread.h> |
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2 | #include <stdio.h> |
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3 | #include <stdbool.h> |
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4 | |
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5 | #include "../bench.h" |
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6 | |
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7 | pthread_mutex_t mutex; |
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8 | |
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9 | volatile bool go = false; |
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10 | |
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11 | void call() { |
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12 | go = true; |
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13 | for ( size_t i = 0; i < times; i += 1 ) { |
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14 | pthread_mutex_lock( &mutex ); |
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15 | pthread_mutex_unlock( &mutex ); |
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16 | } |
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17 | go = false; |
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18 | } |
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19 | void * thread_main( __attribute__((unused)) void * arg ) { |
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20 | while ( ! go ); |
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21 | while ( go ) { |
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22 | pthread_mutex_lock( &mutex ); |
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23 | pthread_mutex_unlock( &mutex ); |
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24 | } |
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25 | return NULL; |
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26 | } |
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27 | int main( int argc, char * argv[] ) { |
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28 | BENCH_START() |
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29 | pthread_t thread; |
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30 | if ( pthread_create( &thread, NULL, thread_main, NULL ) < 0 ) { |
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31 | perror( "failure" ); |
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32 | return EXIT_FAILURE; |
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33 | } |
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34 | BENCH( |
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35 | call(), |
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36 | result |
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37 | ) |
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38 | printf( "%g\n", result ); |
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39 | if ( pthread_join( thread, NULL ) < 0 ) { |
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40 | perror( "failure" ); |
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41 | return EXIT_FAILURE; |
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42 | } |
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43 | } |
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44 | |
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45 | // Local Variables: // |
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46 | // tab-width: 4 // |
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47 | // End: // |
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