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82 lines
2.2 KiB
82 lines
2.2 KiB
/* |
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* libusbx synchronization using POSIX Threads |
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* |
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* Copyright © 2011 Vitali Lovich <vlovich@aliph.com> |
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* Copyright © 2011 Peter Stuge <peter@stuge.se> |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* This library is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with this library; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#if defined(__linux__) || defined(__OpenBSD__) |
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# if defined(__linux__) |
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# define _GNU_SOURCE |
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# else |
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# define _BSD_SOURCE |
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# endif |
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# include <unistd.h> |
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# include <sys/syscall.h> |
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#elif defined(__APPLE__) |
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# include <mach/mach.h> |
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#elif defined(__CYGWIN__) |
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# include <windows.h> |
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#endif |
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#include "threads_posix.h" |
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int usbi_mutex_init_recursive(pthread_mutex_t *mutex, pthread_mutexattr_t *attr) |
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{ |
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int err; |
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pthread_mutexattr_t stack_attr; |
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if (!attr) { |
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attr = &stack_attr; |
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err = pthread_mutexattr_init(&stack_attr); |
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if (err != 0) |
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return err; |
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} |
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/* mutexattr_settype requires _GNU_SOURCE or _XOPEN_SOURCE >= 500 on Linux */ |
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err = pthread_mutexattr_settype(attr, PTHREAD_MUTEX_RECURSIVE); |
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if (err != 0) |
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goto finish; |
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err = pthread_mutex_init(mutex, attr); |
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finish: |
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if (attr == &stack_attr) |
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pthread_mutexattr_destroy(&stack_attr); |
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return err; |
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} |
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int usbi_get_tid(void) |
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{ |
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int ret = -1; |
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#if defined(__ANDROID__) |
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ret = gettid(); |
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#elif defined(__linux__) |
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ret = syscall(SYS_gettid); |
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#elif defined(__OpenBSD__) |
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/* The following only works with OpenBSD > 5.1 as it requires |
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real thread support. For 5.1 and earlier, -1 is returned. */ |
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ret = syscall(SYS_getthrid); |
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#elif defined(__APPLE__) |
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ret = mach_thread_self(); |
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mach_port_deallocate(mach_task_self(), ret); |
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#elif defined(__CYGWIN__) |
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ret = GetCurrentThreadId(); |
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#endif |
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/* TODO: NetBSD thread ID support */ |
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return ret; |
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}
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