70 lines
2.3 KiB
C
70 lines
2.3 KiB
C
/* GNU Objective C Runtime @synchronized implementation
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Copyright (C) 2010-2018 Free Software Foundation, Inc.
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Contributed by Nicola Pero <nicola.pero@meta-innovation.com>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC 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
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GNU General Public License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef __objc_sync_INCLUDE_GNU
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#define __objc_sync_INCLUDE_GNU
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#include "objc.h"
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#include "objc-decls.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* These functions are automatically called by @synchronized(). */
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/* 'objc_sync_enter' is automatically called when entering a
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@synchronized() block. It locks the recursive lock associated with
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'object'. If 'object' is nil, it does nothing. It returns
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OBJC_SYNC_SUCCESS on success; see the enumeration below for error
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values.
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Note that you should not rely on the behaviour when 'object' is nil
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because it could change. */
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objc_EXPORT int objc_sync_enter (id object);
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/* 'objc_sync_exit' is automatically called when exiting from a
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@synchronized() block. It unlocks the recursive lock associated
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with 'object'. If 'object' is nil, it does nothing. It returns
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OBJC_SYNC_SUCCESS on success; see the enumeration below for error
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values. */
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objc_EXPORT int objc_sync_exit (id object);
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/* All the possible return values for objc_sync_enter() and
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objc_sync_exit().
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*/
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enum {
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OBJC_SYNC_SUCCESS = 0,
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OBJC_SYNC_NOT_OWNING_THREAD_ERROR = -1,
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OBJC_SYNC_TIMED_OUT = -2,
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OBJC_SYNC_NOT_INITIALIZED = -3
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* not __objc_sync_INCLUDE_GNU */
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