Last change
on this file since 9d5eacb 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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Rev | Line | |
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[51493a4] | 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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