1 /* 2 * libusb synchronization using POSIX Threads 3 * 4 * Copyright (C) 2011 Vitali Lovich <vlovich (at) aliph.com> 5 * Copyright (C) 2011 Peter Stuge <peter (at) stuge.se> 6 * 7 * This library is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * This library is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with this library; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22 #ifdef _XOPEN_SOURCE 23 # if _XOPEN_SOURCE < 500 24 # undef _XOPEN_SOURCE 25 # define _XOPEN_SOURCE 500 26 # endif 27 #else 28 #define _XOPEN_SOURCE 500 29 #endif /* _XOPEN_SOURCE */ 30 31 #include "threads_posix.h" 32 33 int usbi_mutex_init_recursive(pthread_mutex_t *mutex, pthread_mutexattr_t *attr) 34 { 35 int err; 36 pthread_mutexattr_t stack_attr; 37 if (!attr) { 38 attr = &stack_attr; 39 err = pthread_mutexattr_init(&stack_attr); 40 if (err != 0) 41 return err; 42 } 43 44 err = pthread_mutexattr_settype(attr, PTHREAD_MUTEX_RECURSIVE); 45 if (err != 0) 46 goto finish; 47 48 err = pthread_mutex_init(mutex, attr); 49 50 finish: 51 if (attr == &stack_attr) 52 pthread_mutexattr_destroy(&stack_attr); 53 54 return err; 55 } 56
