15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)/* 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * pthread_rwlockattr_init.c 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Description: 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This translation unit implements read/write lock primitives. 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * -------------------------------------------------------------------------- 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Pthreads-win32 - POSIX Threads Library for Win32 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Copyright(C) 1998 John E. Bossom 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Copyright(C) 1999,2005 Pthreads-win32 contributors 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Contact Email: rpj@callisto.canberra.edu.au 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * The current list of contributors is contained 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * in the file CONTRIBUTORS included with the source 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * code distribution. The list can also be seen at the 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * following World Wide Web location: 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * http://sources.redhat.com/pthreads-win32/contributors.html 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This library is free software; you can redistribute it and/or 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * modify it under the terms of the GNU Lesser General Public 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * License as published by the Free Software Foundation; either 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * version 2 of the License, or (at your option) any later version. 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * This library is distributed in the hope that it will be useful, 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * but WITHOUT ANY WARRANTY; without even the implied warranty of 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Lesser General Public License for more details. 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * You should have received a copy of the GNU Lesser General Public 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * License along with this library in the file COPYING.LIB; 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * if not, write to the Free Software Foundation, Inc., 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <limits.h> 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "pthread.h" 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "implement.h" 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)int 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)pthread_rwlockattr_init (pthread_rwlockattr_t * attr) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) /* 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ------------------------------------------------------ 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * DOCPUBLIC 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Initializes a rwlock attributes object with default 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * attributes. 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * PARAMETERS 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * attr 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * pointer to an instance of pthread_rwlockattr_t 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * DESCRIPTION 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * Initializes a rwlock attributes object with default 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * attributes. 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * RESULTS 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 0 successfully initialized attr, 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ENOMEM insufficient memory for attr. 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) * ------------------------------------------------------ 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) */ 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int result = 0; 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pthread_rwlockattr_t rwa; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rwa = (pthread_rwlockattr_t) calloc (1, sizeof (*rwa)); 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (rwa == NULL) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) result = ENOMEM; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) rwa->pshared = PTHREAD_PROCESS_PRIVATE; 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) *attr = rwa; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return (result); 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} /* pthread_rwlockattr_init */ 84