| /* |
| * libjingle |
| * Copyright 2012, Google Inc. |
| * |
| * 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. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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. |
| */ |
| |
| // This file is a supermacro |
| // (see http://wanderinghorse.net/computing/papers/supermacros_cpp.html) to |
| // expand a declaration of a late-binding symbol table class. |
| // |
| // Arguments: |
| // LATE_BINDING_SYMBOL_TABLE_CLASS_NAME: Name of the class to generate. |
| // LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST: List of symbols to load from the DLL, |
| // as an X-Macro list (see http://www.drdobbs.com/blogs/cpp/228700289). |
| // |
| // From a .h file, include the header(s) for the DLL to late-bind and the |
| // latebindingsymboltable.h header, and then call this supermacro (optionally |
| // from inside the namespace for the class to generate, if any). Example: |
| // |
| // #include <headerfordll.h> |
| // |
| // #include "talk/base/latebindingsymboltable.h" |
| // |
| // namespace foo { |
| // |
| // #define MY_CLASS_NAME DesiredClassName |
| // #define MY_SYMBOLS_LIST X(acos) X(sin) X(tan) |
| // |
| // #define LATE_BINDING_SYMBOL_TABLE_CLASS_NAME MY_CLASS_NAME |
| // #define LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST MY_SYMBOLS_LIST |
| // #include "talk/base/latebindingsymboltable.h.def" |
| // |
| // } |
| |
| #ifndef TALK_BASE_LATEBINDINGSYMBOLTABLE_H_ |
| #error You must first include latebindingsymboltable.h |
| #endif |
| |
| #ifndef LATE_BINDING_SYMBOL_TABLE_CLASS_NAME |
| #error You must define LATE_BINDING_SYMBOL_TABLE_CLASS_NAME |
| #endif |
| |
| #ifndef LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST |
| #error You must define LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST |
| #endif |
| |
| class LATE_BINDING_SYMBOL_TABLE_CLASS_NAME : |
| public ::talk_base::LateBindingSymbolTable { |
| public: |
| LATE_BINDING_SYMBOL_TABLE_CLASS_NAME(); |
| ~LATE_BINDING_SYMBOL_TABLE_CLASS_NAME(); |
| |
| #define X(sym) \ |
| typeof(&::sym) sym() const { \ |
| ASSERT(::talk_base::LateBindingSymbolTable::IsLoaded()); \ |
| return reinterpret_cast<typeof(&::sym)>(table_[SYMBOL_TABLE_INDEX_##sym]); \ |
| } |
| LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST |
| #undef X |
| |
| private: |
| enum { |
| #define X(sym) \ |
| SYMBOL_TABLE_INDEX_##sym, |
| LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST |
| #undef X |
| SYMBOL_TABLE_SIZE |
| }; |
| |
| static const ::talk_base::LateBindingSymbolTable::TableInfo kTableInfo; |
| |
| void *table_[SYMBOL_TABLE_SIZE]; |
| |
| DISALLOW_COPY_AND_ASSIGN(LATE_BINDING_SYMBOL_TABLE_CLASS_NAME); |
| }; |
| |
| #undef LATE_BINDING_SYMBOL_TABLE_CLASS_NAME |
| #undef LATE_BINDING_SYMBOL_TABLE_SYMBOLS_LIST |