runtime/objc-locks-old.h

   1 /*
   2  * Copyright (c) 2017 Apple Inc.  All Rights Reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23
  24 /***********************************************************************
  25 * objc-locks-old.h
  26 * Declarations of all locks used in the runtime.
  27 **********************************************************************/
  28
  29 #ifndef _OBJC_LOCKS_OLD_H
  30 #define _OBJC_LOCKS_OLD_H
  31
  32 // fork() safety requires careful tracking of all locks used in the runtime.
  33 // Thou shalt not declare any locks outside this file.
  34
  35 extern mutex_t classLock;
  36 extern mutex_t methodListLock;
  37 extern mutex_t NXUniqueStringLock;
  38 extern spinlock_t impLock;
  39
  40 #endif