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diff --git a/gcc-4.7/libobjc/objc/thr.h b/gcc-4.7/libobjc/objc/thr.h
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-/* Thread and mutex controls for Objective C.
- Copyright (C) 1996, 1997, 2002, 2004, 2009, 2010
- Free Software Foundation, Inc.
- Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
-
-This file is part of GCC.
-
-GCC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 3, or (at your option)
-any later version.
-
-GCC 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 General Public License for more details.
-
-Under Section 7 of GPL version 3, you are granted additional
-permissions described in the GCC Runtime Library Exception, version
-3.1, as published by the Free Software Foundation.
-
-You should have received a copy of the GNU General Public License and
-a copy of the GCC Runtime Library Exception along with this program;
-see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
-<http://www.gnu.org/licenses/>. */
-
-#ifndef __thread_INCLUDE_GNU
-#define __thread_INCLUDE_GNU
-
-#include "objc.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif /* __cplusplus */
-
-/*************************************************************************
- * Universal static variables:
- */
-extern int __objc_thread_exit_status; /* Global exit status. */
-
-/********
- * Thread safe implementation types and functions.
- */
-
-/* Thread priorities */
-#define OBJC_THREAD_INTERACTIVE_PRIORITY 2
-#define OBJC_THREAD_BACKGROUND_PRIORITY 1
-#define OBJC_THREAD_LOW_PRIORITY 0
-
-/* A thread */
-typedef void * objc_thread_t;
-
-/* This structure represents a single mutual exclusion lock. */
-struct objc_mutex
-{
- volatile objc_thread_t owner; /* Id of thread that owns. */
- volatile int depth; /* # of acquires. */
- void * backend; /* Specific to backend */
-};
-typedef struct objc_mutex *objc_mutex_t;
-
-/* This structure represents a single condition mutex */
-struct objc_condition
-{
- void * backend; /* Specific to backend */
-};
-typedef struct objc_condition *objc_condition_t;
-
-/* Frontend mutex functions */
-objc_mutex_t objc_mutex_allocate (void);
-int objc_mutex_deallocate (objc_mutex_t mutex);
-int objc_mutex_lock (objc_mutex_t mutex);
-int objc_mutex_unlock (objc_mutex_t mutex);
-int objc_mutex_trylock (objc_mutex_t mutex);
-
-/* Frontend condition mutex functions */
-objc_condition_t objc_condition_allocate (void);
-int objc_condition_deallocate (objc_condition_t condition);
-int objc_condition_wait (objc_condition_t condition, objc_mutex_t mutex);
-int objc_condition_signal (objc_condition_t condition);
-int objc_condition_broadcast (objc_condition_t condition);
-
-/* Frontend thread functions */
-objc_thread_t objc_thread_detach (SEL selector, id object, id argument);
-void objc_thread_yield (void);
-int objc_thread_exit (void);
-int objc_thread_set_priority (int priority);
-int objc_thread_get_priority (void);
-void * objc_thread_get_data (void);
-int objc_thread_set_data (void *value);
-objc_thread_t objc_thread_id (void);
-void objc_thread_add (void);
-void objc_thread_remove (void);
-
-/*
- Use this to set the hook function that will be called when the
- runtime initially becomes multi threaded.
- The hook function is only called once, meaning only when the
- 2nd thread is spawned, not for each and every thread.
-
- It returns the previous hook function or NULL if there is none.
-
- A program outside of the runtime could set this to some function so
- it can be informed; for example, the GNUstep Base Library sets it
- so it can implement the NSBecomingMultiThreaded notification.
- */
-typedef void (*objc_thread_callback) (void);
-objc_thread_callback objc_set_thread_callback (objc_thread_callback func);
-
-/* Backend initialization functions */
-int __objc_init_thread_system (void);
-
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-
-#endif /* not __thread_INCLUDE_GNU */