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/*
* File: condvar3.c
*
* Test Synopsis:
* - Test basic function of a CV
*
* Test Method (Validation or Falsification):
* - Validation
*
* Requirements Tested:
* -
*
* Features Tested:
* -
*
* Cases Tested:
* -
*
* Description:
* - The primary thread takes the lock before creating any threads.
* The secondary thread blocks on the lock allowing the primary
* thread to enter the cv wait state which releases the lock.
* The secondary thread then takes the lock and signals the waiting
* primary thread.
*
* Environment:
* -
*
* Input:
* - None.
*
* Output:
* - File name, Line number, and failed expression on failure.
* - No output on success.
*
* Assumptions:
* -
*
* Pass Criteria:
* - pthread_cond_timedwait returns 0.
* - Process returns zero exit status.
*
* Fail Criteria:
* - pthread_cond_timedwait returns ETIMEDOUT.
* - Process returns non-zero exit status.
*/
#include "test.h"
#include <sys/timeb.h>
static pthread_cond_t cv;
static pthread_mutex_t mutex;
static int shared = 0;
enum {
NUMTHREADS = 2 /* Including the primary thread. */
};
void *
mythread(void * arg)
{
assert(pthread_mutex_lock(&mutex) == 0);
shared++;
assert(pthread_mutex_unlock(&mutex) == 0);
assert(pthread_cond_signal(&cv) == 0);
return 0;
}
int
main()
{
pthread_t t[NUMTHREADS];
struct timespec abstime = { 0, 0 };
#if defined(__MINGW32__)
struct timeb currSysTime;
#else
struct _timeb currSysTime;
#endif
const DWORD NANOSEC_PER_MILLISEC = 1000000;
assert((t[0] = pthread_self()) != NULL);
assert(pthread_cond_init(&cv, NULL) == 0);
assert(pthread_mutex_init(&mutex, NULL) == 0);
assert(pthread_mutex_lock(&mutex) == 0);
/* get current system time */
_ftime(&currSysTime);
abstime.tv_sec = currSysTime.time;
abstime.tv_nsec = NANOSEC_PER_MILLISEC * currSysTime.millitm;
assert(pthread_create(&t[1], NULL, mythread, (void *) 1) == 0);
abstime.tv_sec += 5;
while (! shared > 0)
assert(pthread_cond_timedwait(&cv, &mutex, &abstime) == 0);
assert(shared > 0);
assert(pthread_mutex_unlock(&mutex) == 0);
assert(pthread_cond_destroy(&cv) == 0);
return 0;
}
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