| /* |
| * libusbx synchronization using POSIX Threads |
| * |
| * Copyright © 2011 Vitali Lovich <vlovich@aliph.com> |
| * Copyright © 2011 Peter Stuge <peter@stuge.se> |
| * |
| * 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 2.1 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; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #if defined(__linux__) || defined(__OpenBSD__) |
| # include <unistd.h> |
| # include <sys/syscall.h> |
| #elif defined(__APPLE__) |
| # include <mach/mach.h> |
| #elif defined(__CYGWIN__) |
| # include <windows.h> |
| #endif |
| |
| #include "threads_posix.h" |
| |
| int usbi_mutex_init_recursive(pthread_mutex_t *mutex, pthread_mutexattr_t *attr) |
| { |
| int err; |
| pthread_mutexattr_t stack_attr; |
| if (!attr) { |
| attr = &stack_attr; |
| err = pthread_mutexattr_init(&stack_attr); |
| if (err != 0) |
| return err; |
| } |
| |
| /* mutexattr_settype requires _GNU_SOURCE or _XOPEN_SOURCE >= 500 on Linux */ |
| err = pthread_mutexattr_settype(attr, PTHREAD_MUTEX_RECURSIVE); |
| if (err != 0) |
| goto finish; |
| |
| err = pthread_mutex_init(mutex, attr); |
| |
| finish: |
| if (attr == &stack_attr) |
| pthread_mutexattr_destroy(&stack_attr); |
| |
| return err; |
| } |
| |
| int usbi_get_tid(void) |
| { |
| int ret = -1; |
| #if defined(__linux__) |
| ret = syscall(SYS_gettid); |
| #elif defined(__OpenBSD__) |
| /* The following only works with OpenBSD > 5.1 as it requires |
| real thread support. For 5.1 and earlier, -1 is returned. */ |
| ret = syscall(SYS_getthrid); |
| #elif defined(__APPLE__) |
| ret = mach_thread_self(); |
| mach_port_deallocate(mach_task_self(), ret); |
| #elif defined(__CYGWIN__) |
| ret = GetCurrentThreadId(); |
| #endif |
| /* TODO: NetBSD thread ID support */ |
| return ret; |
| } |