/* * File: condvar3.c * * * -------------------------------------------------------------------------- * * -------------------------------------------------------------------------- * * Pthreads-win32 - POSIX Threads Library for Win32 * Copyright(C) 1998 John E. Bossom * Copyright(C) 1999,2002 Pthreads-win32 contributors * * Contact Email: rpj@ise.canberra.edu.au * * The current list of contributors is contained * in the file CONTRIBUTORS included with the source * code distribution. The list can also be seen at the * following World Wide Web location: * http://sources.redhat.com/pthreads-win32/contributors.html * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library in the file COPYING.LIB; * if not, write to the Free Software Foundation, Inc., * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA * * -------------------------------------------------------------------------- * * 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) { int result = 0; assert(pthread_mutex_lock(&mutex) == 0); shared++; assert(pthread_mutex_unlock(&mutex) == 0); if ((result = pthread_cond_signal(&cv)) != 0) { printf("Error = %s\n", error_string[result]); } assert(result == 0); return (void *) 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; }