Revert 129069 - Import libusb 1.0.9-rc3 into third_party.

third_party/libusb/libusb/os/threads_posix.c

Index: third_party/libusb/libusb/os/threads_posix.c
===================================================================
--- third_party/libusb/libusb/os/threads_posix.c	(revision 129100)
+++ third_party/libusb/libusb/os/threads_posix.c	(working copy)
@@ -1,55 +0,0 @@
-/*
- * libusb synchronization using POSIX Threads
- *
- * Copyright (C) 2011 Vitali Lovich <vlovich@aliph.com>
- * Copyright (C) 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
- */
-
-#ifdef _XOPEN_SOURCE
-# if _XOPEN_SOURCE < 500
-#  undef _XOPEN_SOURCE
-#  define _XOPEN_SOURCE 500
-# endif
-#else
-#define _XOPEN_SOURCE 500
-#endif /* _XOPEN_SOURCE */
-
-#include <pthread.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;
-	}
-
-	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;
-}