2 * libusb synchronization using POSIX Threads
4 * Copyright © 2011 Vitali Lovich <vlovich@aliph.com>
5 * Copyright © 2011 Peter Stuge <peter@stuge.se>
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.
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.
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
24 #if defined(__linux__) || defined(__OpenBSD__)
25 # if defined(__linux__)
31 # include <sys/syscall.h>
32 #elif defined(__APPLE__)
33 # include <mach/mach.h>
34 #elif defined(__CYGWIN__)
38 #include "threads_posix.h"
40 int usbi_mutex_init_recursive(pthread_mutex_t *mutex, pthread_mutexattr_t *attr)
43 pthread_mutexattr_t stack_attr;
46 err = pthread_mutexattr_init(&stack_attr);
51 /* mutexattr_settype requires _GNU_SOURCE or _XOPEN_SOURCE >= 500 on Linux */
52 err = pthread_mutexattr_settype(attr, PTHREAD_MUTEX_RECURSIVE);
56 err = pthread_mutex_init(mutex, attr);
59 if (attr == &stack_attr)
60 pthread_mutexattr_destroy(&stack_attr);
65 int usbi_get_tid(void)
68 #if defined(__ANDROID__)
70 #elif defined(__linux__)
71 ret = syscall(SYS_gettid);
72 #elif defined(__OpenBSD__)
73 /* The following only works with OpenBSD > 5.1 as it requires
74 real thread support. For 5.1 and earlier, -1 is returned. */
75 ret = syscall(SYS_getthrid);
76 #elif defined(__APPLE__)
77 ret = mach_thread_self();
78 mach_port_deallocate(mach_task_self(), ret);
79 #elif defined(__CYGWIN__)
80 ret = GetCurrentThreadId();
82 /* TODO: NetBSD thread ID support */