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| 1 /* | |
| 2 * Copyright 2004 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 #ifndef WEBRTC_BASE_LATEBINDINGSYMBOLTABLE_H_ | |
| 12 #define WEBRTC_BASE_LATEBINDINGSYMBOLTABLE_H_ | |
| 13 | |
| 14 #include <string.h> | |
| 15 | |
| 16 #include "webrtc/base/common.h" | |
| 17 #include "webrtc/base/constructormagic.h" | |
| 18 | |
| 19 namespace rtc { | |
| 20 | |
| 21 #if defined(WEBRTC_POSIX) | |
| 22 typedef void *DllHandle; | |
| 23 #else | |
| 24 #error Not implemented for this platform | |
| 25 #endif | |
| 26 | |
| 27 // This is the base class for "symbol table" classes to simplify the dynamic | |
| 28 // loading of symbols from DLLs. Currently the implementation only supports | |
| 29 // Linux and OS X, and pure C symbols (or extern "C" symbols that wrap C++ | |
| 30 // functions). Sub-classes for specific DLLs are generated via the "supermacro" | |
| 31 // files latebindingsymboltable.h.def and latebindingsymboltable.cc.def. See | |
| 32 // talk/sound/pulseaudiosymboltable.(h|cc) for an example. | |
| 33 class LateBindingSymbolTable { | |
| 34 public: | |
| 35 struct TableInfo { | |
| 36 const char *dll_name; | |
| 37 int num_symbols; | |
| 38 // Array of size num_symbols. | |
| 39 const char *const *symbol_names; | |
| 40 }; | |
| 41 | |
| 42 LateBindingSymbolTable(const TableInfo *info, void **table); | |
| 43 ~LateBindingSymbolTable(); | |
| 44 | |
| 45 bool IsLoaded() const; | |
| 46 // Loads the DLL and the symbol table. Returns true iff the DLL and symbol | |
| 47 // table loaded successfully. | |
| 48 bool Load(); | |
| 49 // Like load, but allows overriding the dll path for when the dll path is | |
| 50 // dynamic. | |
| 51 bool LoadFromPath(const char *dll_path); | |
| 52 void Unload(); | |
| 53 | |
| 54 // Gets the raw OS handle to the DLL. Be careful what you do with it. | |
| 55 DllHandle GetDllHandle() const { return handle_; } | |
| 56 | |
| 57 private: | |
| 58 void ClearSymbols(); | |
| 59 | |
| 60 const TableInfo *info_; | |
| 61 void **table_; | |
| 62 DllHandle handle_; | |
| 63 bool undefined_symbols_; | |
| 64 | |
| 65 RTC_DISALLOW_COPY_AND_ASSIGN(LateBindingSymbolTable); | |
| 66 }; | |
| 67 | |
| 68 } // namespace rtc | |
| 69 | |
| 70 #endif // WEBRTC_BASE_LATEBINDINGSYMBOLTABLE_H_ | |
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Chromium Code Reviews
Issue 2534593002:
Get rid of webrtc/base/latebindingsymboltable* (Closed)
