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/* GNU Objective C Runtime @synchronized implementation
Copyright (C) 2010-2020 Free Software Foundation, Inc.
Contributed by Nicola Pero <nicola.pero@meta-innovation.com>
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 __objc_sync_INCLUDE_GNU
#define __objc_sync_INCLUDE_GNU
#include "objc.h"
#include "objc-decls.h"
#ifdef __cplusplus
extern "C" {
#endif
/* These functions are automatically called by @synchronized(). */
/* 'objc_sync_enter' is automatically called when entering a
@synchronized() block. It locks the recursive lock associated with
'object'. If 'object' is nil, it does nothing. It returns
OBJC_SYNC_SUCCESS on success; see the enumeration below for error
values.
Note that you should not rely on the behaviour when 'object' is nil
because it could change. */
objc_EXPORT int objc_sync_enter (id object);
/* 'objc_sync_exit' is automatically called when exiting from a
@synchronized() block. It unlocks the recursive lock associated
with 'object'. If 'object' is nil, it does nothing. It returns
OBJC_SYNC_SUCCESS on success; see the enumeration below for error
values. */
objc_EXPORT int objc_sync_exit (id object);
/* All the possible return values for objc_sync_enter() and
objc_sync_exit().
*/
enum {
OBJC_SYNC_SUCCESS = 0,
OBJC_SYNC_NOT_OWNING_THREAD_ERROR = -1,
OBJC_SYNC_TIMED_OUT = -2,
OBJC_SYNC_NOT_INITIALIZED = -3
};
#ifdef __cplusplus
}
#endif
#endif /* not __objc_sync_INCLUDE_GNU */
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