146 lines
2.8 KiB
C
146 lines
2.8 KiB
C
/*
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* File: condvar3_1.c
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*
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* Test Synopsis:
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* - Test timeout of multiple waits on a CV with some signaled.
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*
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* Test Method (Validation or Falsification):
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* - Validation
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*
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* Requirements Tested:
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* -
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*
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* Features Tested:
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* -
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*
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* Cases Tested:
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* -
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*
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* Description:
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* - Because some CVs are never signaled, we expect their waits to time out.
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* Some are signaled, the rest time out. Pthread_cond_destroy() will fail
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* unless all are accounted for, either signaled or timedout.
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*
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* Environment:
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* -
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*
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* Input:
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* - None.
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*
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* Output:
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* - File name, Line number, and failed expression on failure.
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* - No output on success.
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*
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* Assumptions:
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* -
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*
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* Pass Criteria:
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* - pthread_cond_timedwait returns ETIMEDOUT.
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* - Process returns zero exit status.
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*
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* Fail Criteria:
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* - pthread_cond_timedwait does not return ETIMEDOUT.
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* - Process returns non-zero exit status.
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*/
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#include "test.h"
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#include <sys/timeb.h>
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static pthread_cond_t cv;
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static pthread_cond_t cv1;
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static pthread_mutex_t mutex;
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static struct timespec abstime = { 0, 0 };
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static int timedout = 0;
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static int signaled = 0;
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static int awoken = 0;
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static int waiting = 0;
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enum {
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NUMTHREADS = 60
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};
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void *
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mythread(void * arg)
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{
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int result;
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assert(pthread_mutex_lock(&mutex) == 0);
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if ( ++waiting == NUMTHREADS)
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assert(pthread_cond_signal(&cv1) == 0);
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result = pthread_cond_timedwait(&cv, &mutex, &abstime);
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if (result == ETIMEDOUT)
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{
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timedout++;
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}
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else
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{
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awoken++;
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}
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assert(pthread_mutex_unlock(&mutex) == 0);
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return arg;
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}
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int
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main()
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{
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int i;
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pthread_t t[NUMTHREADS + 1];
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int result = 0;
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struct timeb currSysTime;
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const DWORD NANOSEC_PER_MILLISEC = 1000000;
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assert(pthread_cond_init(&cv, NULL) == 0);
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assert(pthread_cond_init(&cv1, NULL) == 0);
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assert(pthread_mutex_init(&mutex, NULL) == 0);
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/* get current system time */
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ftime(&currSysTime);
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abstime.tv_sec = currSysTime.time;
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abstime.tv_nsec = NANOSEC_PER_MILLISEC * currSysTime.millitm;
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abstime.tv_sec += 5;
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assert(pthread_mutex_lock(&mutex) == 0);
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for (i = 1; i <= NUMTHREADS; i++)
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{
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assert(pthread_create(&t[i], NULL, mythread, (void *) i) == 0);
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}
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do {
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assert(pthread_cond_wait(&cv1,&mutex) == 0);
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} while ( NUMTHREADS != waiting );
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assert(pthread_mutex_unlock(&mutex) == 0);
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for (i = NUMTHREADS/3; i <= 2*NUMTHREADS/3; i++)
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{
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assert(pthread_cond_signal(&cv) == 0);
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signaled++;
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}
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for (i = 1; i <= NUMTHREADS; i++)
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{
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assert(pthread_join(t[i], (void **) &result) == 0);
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assert(result == i);
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}
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printf("awk = %d\n", awoken);
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printf("sig = %d\n", signaled);
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printf("tot = %d\n", timedout);
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assert(signaled == awoken);
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assert(timedout == NUMTHREADS - signaled);
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result = pthread_cond_destroy(&cv);
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assert(result == 0);
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return 0;
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}
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