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diff --git a/contrib/libobjc/objc/thr.h b/contrib/libobjc/objc/thr.h
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-/* Thread and mutex controls for Objective C.
- Copyright (C) 1996, 1997 Free Software Foundation, Inc.
- Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
-
-This file is part of GNU CC.
-
-GNU CC 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 2, or (at your option)
-any later version.
-
-GNU CC 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.
-
-GNU CC 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 2, or (at your option) any later version.
-
-GNU CC 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.
-
-You should have received a copy of the GNU General Public License along with
-GNU CC; see the file COPYING. If not, write to the Free Software
-Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-/* As a special exception, if you link this library with files
- compiled with GCC to produce an executable, this does not cause
- the resulting executable to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License. */
-
-
-#ifndef __thread_INCLUDE_GNU
-#define __thread_INCLUDE_GNU
-
-#include "objc/objc.h"
-
-/*************************************************************************
- * 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);
-
-/*
- 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)();
-objc_thread_callback objc_set_thread_callback(objc_thread_callback func);
-
-/* Backend initialization functions */
-int __objc_init_thread_system(void);
-int __objc_fini_thread_system(void);
-
-/* Backend mutex functions */
-int __objc_mutex_allocate(objc_mutex_t mutex);
-int __objc_mutex_deallocate(objc_mutex_t mutex);
-int __objc_mutex_lock(objc_mutex_t mutex);
-int __objc_mutex_trylock(objc_mutex_t mutex);
-int __objc_mutex_unlock(objc_mutex_t mutex);
-
-/* Backend condition mutex functions */
-int __objc_condition_allocate(objc_condition_t condition);
-int __objc_condition_deallocate(objc_condition_t condition);
-int __objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex);
-int __objc_condition_broadcast(objc_condition_t condition);
-int __objc_condition_signal(objc_condition_t condition);
-
-/* Backend thread functions */
-objc_thread_t __objc_thread_detach(void (*func)(void *arg), void *arg);
-int __objc_thread_set_priority(int priority);
-int __objc_thread_get_priority(void);
-void __objc_thread_yield(void);
-int __objc_thread_exit(void);
-objc_thread_t __objc_thread_id(void);
-int __objc_thread_set_data(void *value);
-void * __objc_thread_get_data(void);
-
-#endif /* not __thread_INCLUDE_GNU */