/* * Copyright (C) 2007, 2008, 2011-2016 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef BSoftLinking_h #define BSoftLinking_h #include "BAssert.h" #include <dlfcn.h> #include <mutex> #define BSOFT_LINK_PRIVATE_FRAMEWORK(framework) \ static void* framework##Library() \ { \ static void* frameworkLibrary; \ static std::once_flag once; \ std::call_once(once, [] { \ frameworkLibrary = dlopen("/System/Library/PrivateFrameworks/" #framework ".framework/" #framework, RTLD_NOW); \ RELEASE_BASSERT_WITH_MESSAGE(frameworkLibrary, "%s", dlerror()); \ }); \ return frameworkLibrary; \ } #define BSOFT_LINK_FUNCTION(framework, functionName, resultType, parameterDeclarations, parameterNames) \ extern "C" { \ resultType functionName parameterDeclarations; \ } \ static resultType init##functionName parameterDeclarations; \ static resultType (*softLink##functionName) parameterDeclarations = init##functionName; \ \ static resultType init##functionName parameterDeclarations \ { \ static std::once_flag once; \ std::call_once(once, [] { \ softLink##functionName = (resultType (*) parameterDeclarations) dlsym(framework##Library(), #functionName); \ RELEASE_BASSERT_WITH_MESSAGE(softLink##functionName, "%s", dlerror()); \ }); \ return softLink##functionName parameterNames; \ } \ \ inline resultType functionName parameterDeclarations \ { \ return softLink##functionName parameterNames; \ } #endif // BSoftLinking_h