/* * 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 }; struct _timeb currSysTime; 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; }