/* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * "Portions Copyright (c) 1999 Apple Computer, Inc. All Rights * Reserved. 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 1.0 (the 'License'). You may not use this file * except in compliance with the License. Please obtain a copy of the * License at http://www.apple.com/publicsource 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 OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License." * * @APPLE_LICENSE_HEADER_END@ */ /* * Lock.h * * Simple and thread (recursive) locks. * * Copyright (c) 1999, Apple Computer Inc. All rights reserved. * Written by Marc Majka */ #import "Root.h" #ifdef _THREAD_TYPE_PTHREAD_ #include <pthread.h> #else #ifdef TRUE #undef TRUE #endif #ifdef FALSE #undef FALSE #endif #include <mach/cthreads.h> #endif #define USE_INTERNAL_SPIN_LOCK #define thread_id_t unsigned int #define NO_THREAD (thread_id_t)-1 @interface Lock : Root { #ifdef _THREAD_TYPE_PTHREAD_ pthread_mutex_t *internal; pthread_mutex_t *mutex; #else #ifdef USE_INTERNAL_SPIN_LOCK int internal; #else mutex_t internal; #endif mutex_t mutex; #endif thread_id_t thread; BOOL recursive; BOOL locked; } - (Lock *)initRecursive:(BOOL)yn; - (Lock *)initThreadLock; - (void)lock; - (void)unlock; - (BOOL)tryLock; - (BOOL)isLocked; @end