objc-locks.h   [plain text]

/*
 * Copyright (c) 2017 Apple Inc.  All Rights Reserved.
 * 
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
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 * 
 * @APPLE_LICENSE_HEADER_END@
 */

/***********************************************************************
* objc-locks.h
* Declarations of all locks used in the runtime.
**********************************************************************/

#ifndef _OBJC_LOCKS_H
#define _OBJC_LOCKS_H

// fork() safety requires careful tracking of all locks used in the runtime.
// Thou shalt not declare any locks outside this file.

// Lock ordering is declared in _objc_fork_prepare()
// and is enforced by lockdebug.

extern monitor_t classInitLock;
extern mutex_t selLock;
extern mutex_t cacheUpdateLock;
extern recursive_mutex_t loadMethodLock;
extern mutex_t crashlog_lock;
extern spinlock_t objcMsgLogLock;
extern mutex_t AltHandlerDebugLock;
extern mutex_t AssociationsManagerLock;
extern StripedMap<spinlock_t> PropertyLocks;
extern StripedMap<spinlock_t> StructLocks;
extern StripedMap<spinlock_t> CppObjectLocks;

// SideTable lock is buried awkwardly. Call a function to manipulate it.
extern void SideTableLockAll();
extern void SideTableUnlockAll();
extern void SideTableForceResetAll();
extern void SideTableDefineLockOrder();
extern void SideTableLocksPrecedeLock(const void *newlock);
extern void SideTableLocksSucceedLock(const void *oldlock);
extern void SideTableLocksPrecedeLocks(StripedMap<spinlock_t>& newlocks);
extern void SideTableLocksSucceedLocks(StripedMap<spinlock_t>& oldlocks);

#if __OBJC2__
#include "objc-locks-new.h"
#else
#include "objc-locks-old.h"
#endif

#endif