/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*- * * Copyright (c) 2004-2007 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 * limitations under the License. * * @APPLE_LICENSE_HEADER_END@ */ #include <pthread.h> #include "dyldLock.h" static pthread_mutex_t sGlobalMutex; // <rdar://problem/6361143> Need a way to determine if a gdb call to dlopen() would block int __attribute__((visibility("hidden"))) _dyld_global_lock_held = 0; // // This initializer can go away once the following is available: // <rdar://problem/4927311> implement PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP // void dyldGlobalLockInitialize() { pthread_mutexattr_t recursiveMutexAttr; pthread_mutexattr_init(&recursiveMutexAttr); pthread_mutexattr_settype(&recursiveMutexAttr, PTHREAD_MUTEX_RECURSIVE); pthread_mutex_init(&sGlobalMutex, &recursiveMutexAttr); } LockHelper::LockHelper() { dyldGlobalLockAcquire(); } LockHelper::~LockHelper() { dyldGlobalLockRelease(); } void dyldGlobalLockAcquire() { pthread_mutex_lock(&sGlobalMutex); _dyld_global_lock_held = 1; } void dyldGlobalLockRelease() { _dyld_global_lock_held = 0; pthread_mutex_unlock(&sGlobalMutex); }