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| 1 /* | |
| 2 * Copyright 2012 The WebRTC Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 // This file is a supermacro | |
| 12 // (see http://wanderinghorse.net/computing/papers/supermacros_cpp.html) to | |
| 13 // expand a declaration of a late-binding symbol table class. | |
| 14 // | |
| 15 // Arguments: | |
| 16 // LATE_BINDING_SYMBOL_TABLE_CLASS_NAME: Name of the class to generate. | |
| 17 // LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST: List of symbols to load from the DLL, | |
| 18 // as an X-Macro list (see http://www.drdobbs.com/blogs/cpp/228700289). | |
| 19 // | |
| 20 // From a .h file, include the header(s) for the DLL to late-bind and the | |
| 21 // latebindingsymboltable.h header, and then call this supermacro (optionally | |
| 22 // from inside the namespace for the class to generate, if any). Example: | |
| 23 // | |
| 24 // #include <headerfordll.h> | |
| 25 // | |
| 26 // #include "webrtc/base/latebindingsymboltable.h" | |
| 27 // | |
| 28 // namespace foo { | |
| 29 // | |
| 30 // #define MY_CLASS_NAME DesiredClassName | |
| 31 // #define MY_SYMBOLS_LIST X(acos) X(sin) X(tan) | |
| 32 // | |
| 33 // #define LATE_BINDING_SYMBOL_TABLE_CLASS_NAME MY_CLASS_NAME | |
| 34 // #define LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST MY_SYMBOLS_LIST | |
| 35 // #include "webrtc/base/latebindingsymboltable.h.def" | |
| 36 // | |
| 37 // } | |
| 38 | |
| 39 #ifndef WEBRTC_BASE_LATEBINDINGSYMBOLTABLE_H_ | |
| 40 #error You must first include latebindingsymboltable.h | |
| 41 #endif | |
| 42 | |
| 43 #ifndef LATE_BINDING_SYMBOL_TABLE_CLASS_NAME | |
| 44 #error You must define LATE_BINDING_SYMBOL_TABLE_CLASS_NAME | |
| 45 #endif | |
| 46 | |
| 47 #ifndef LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST | |
| 48 #error You must define LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST | |
| 49 #endif | |
| 50 | |
| 51 class LATE_BINDING_SYMBOL_TABLE_CLASS_NAME : | |
| 52 public ::rtc::LateBindingSymbolTable { | |
| 53 public: | |
| 54 LATE_BINDING_SYMBOL_TABLE_CLASS_NAME(); | |
| 55 ~LATE_BINDING_SYMBOL_TABLE_CLASS_NAME(); | |
| 56 | |
| 57 #define X(sym) \ | |
| 58 typeof(&::sym) sym() const { \ | |
| 59 ASSERT(::rtc::LateBindingSymbolTable::IsLoaded()); \ | |
| 60 return reinterpret_cast<typeof(&::sym)>(table_[SYMBOL_TABLE_INDEX_##sym]); \ | |
| 61 } | |
| 62 LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST | |
| 63 #undef X | |
| 64 | |
| 65 private: | |
| 66 enum { | |
| 67 #define X(sym) \ | |
| 68 SYMBOL_TABLE_INDEX_##sym, | |
| 69 LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST | |
| 70 #undef X | |
| 71 SYMBOL_TABLE_SIZE | |
| 72 }; | |
| 73 | |
| 74 static const ::rtc::LateBindingSymbolTable::TableInfo kTableInfo; | |
| 75 static const char *const kSymbolNames[]; | |
| 76 | |
| 77 void *table_[SYMBOL_TABLE_SIZE]; | |
| 78 | |
| 79 RTC_DISALLOW_COPY_AND_ASSIGN(LATE_BINDING_SYMBOL_TABLE_CLASS_NAME); | |
| 80 }; | |
| 81 | |
| 82 #undef LATE_BINDING_SYMBOL_TABLE_CLASS_NAME | |
| 83 #undef LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST | |
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Chromium Code Reviews
Issue 2534593002:
Get rid of webrtc/base/latebindingsymboltable* (Closed)
