/* * rwlock6.c * * * -------------------------------------------------------------------------- * *      Pthreads-win32 - POSIX Threads Library for Win32 *      Copyright(C) 1998 John E. Bossom *      Copyright(C) 1999,2005 Pthreads-win32 contributors *  *      Contact Email: rpj@callisto.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 * * -------------------------------------------------------------------------- * * Check writer and reader locking * * Depends on API functions: *      pthread_rwlock_rdlock() *      pthread_rwlock_wrlock() *      pthread_rwlock_unlock() */#include "test.h"static pthread_rwlock_t rwlock1 = PTHREAD_RWLOCK_INITIALIZER;static int bankAccount = 0;void * wrfunc(void * arg){  int ba;  assert(pthread_rwlock_wrlock(&rwlock1) == 0);  Sleep(2000);  bankAccount += 10;  ba = bankAccount;  assert(pthread_rwlock_unlock(&rwlock1) == 0);  return ((void *) ba);}void * rdfunc(void * arg){  int ba;  assert(pthread_rwlock_rdlock(&rwlock1) == 0);  ba = bankAccount;  assert(pthread_rwlock_unlock(&rwlock1) == 0);  return ((void *) ba);}intmain(){  pthread_t wrt1;  pthread_t wrt2;  pthread_t rdt;  int wr1Result = 0;  int wr2Result = 0;  int rdResult = 0;  bankAccount = 0;  assert(pthread_create(&wrt1, NULL, wrfunc, NULL) == 0);  Sleep(500);  assert(pthread_create(&rdt, NULL, rdfunc, NULL) == 0);  Sleep(500);  assert(pthread_create(&wrt2, NULL, wrfunc, NULL) == 0);  assert(pthread_join(wrt1, (void **) &wr1Result) == 0);  assert(pthread_join(rdt, (void **) &rdResult) == 0);  assert(pthread_join(wrt2, (void **) &wr2Result) == 0);  assert(wr1Result == 10);  assert(rdResult == 10);  assert(wr2Result == 20);  return 0;}