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43 lines
1002 B
43 lines
1002 B
#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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void *functionC();
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pthread_mutex_t mutex1 = PTHREAD_MUTEX_INITIALIZER;
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int counter = 0;
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main()
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{
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int rc1, rc2;
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pthread_t thread1, thread2;
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/* Create independent threads each of which will execute functionC */
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if( (rc1=pthread_create( &thread1, NULL, &functionC, NULL)) )
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{
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printf("Thread creation failed: %d\n", rc1);
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}
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if( (rc2=pthread_create( &thread2, NULL, &functionC, NULL)) )
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{
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printf("Thread creation failed: %d\n", rc2);
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}
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/* Wait till threads are complete before main continues. Unless we */
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/* wait we run the risk of executing an exit which will terminate */
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/* the process and all threads before the threads have completed. */
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pthread_join( thread1, NULL);
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pthread_join( thread2, NULL);
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exit(EXIT_SUCCESS);
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}
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void *functionC()
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{
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pthread_mutex_lock( &mutex1 );
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counter++;
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printf("Counter value: %d\n",counter);
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pthread_mutex_unlock( &mutex1 );
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}
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