1 /* 2 * Copyright (C) 2007 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef SoftLinking_h 30 #define SoftLinking_h 31 32 #include <windows.h> 33 #include <wtf/Assertions.h> 34 35 #define SOFT_LINK_LIBRARY_HELPER(lib, suffix) \ 36 static HMODULE lib##Library() \ 37 { \ 38 static HMODULE library = LoadLibraryW(L###lib suffix); \ 39 return library; \ 40 } 41 42 #if OS(WINCE) 43 #define SOFT_LINK_GETPROCADDRESS GetProcAddressA 44 #else 45 #define SOFT_LINK_GETPROCADDRESS GetProcAddress 46 #endif 47 48 #define SOFT_LINK_LIBRARY(lib) SOFT_LINK_LIBRARY_HELPER(lib, L".dll") 49 #define SOFT_LINK_DEBUG_LIBRARY(lib) SOFT_LINK_LIBRARY_HELPER(lib, L"_debug.dll") 50 51 #define SOFT_LINK(library, functionName, resultType, callingConvention, parameterDeclarations, parameterNames) \ 52 static resultType callingConvention init##functionName parameterDeclarations; \ 53 static resultType (callingConvention*softLink##functionName) parameterDeclarations = init##functionName; \ 54 \ 55 static resultType callingConvention init##functionName parameterDeclarations \ 56 { \ 57 softLink##functionName = reinterpret_cast<resultType (callingConvention*) parameterDeclarations>(SOFT_LINK_GETPROCADDRESS(library##Library(), #functionName)); \ 58 ASSERT(softLink##functionName); \ 59 return softLink##functionName parameterNames; \ 60 }\ 61 \ 62 inline resultType functionName parameterDeclarations \ 63 {\ 64 return softLink##functionName parameterNames; \ 65 } 66 67 #define SOFT_LINK_OPTIONAL(library, functionName, resultType, callingConvention, parameterDeclarations) \ 68 typedef resultType (callingConvention *functionName##PtrType) parameterDeclarations; \ 69 static functionName##PtrType functionName##Ptr() \ 70 { \ 71 static functionName##PtrType ptr; \ 72 static bool initialized; \ 73 \ 74 if (initialized) \ 75 return ptr; \ 76 initialized = true; \ 77 \ 78 ptr = reinterpret_cast<functionName##PtrType>(SOFT_LINK_GETPROCADDRESS(library##Library(), #functionName)); \ 79 return ptr; \ 80 }\ 81 82 #endif // SoftLinking_h 83
