/* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this file, * You can obtain one at http://mozilla.org/MPL/2.0/. */ #include "GLLibraryLoader.h" #include "nsDebug.h" #ifdef WIN32 #include <windows.h> #endif namespace mozilla { namespace gl { bool GLLibraryLoader::OpenLibrary(const char* library) { PRLibSpec lspec; lspec.type = PR_LibSpec_Pathname; lspec.value.pathname = library; mLibrary = PR_LoadLibraryWithFlags(lspec, PR_LD_LAZY | PR_LD_LOCAL); if (!mLibrary) return false; return true; } bool GLLibraryLoader::LoadSymbols(const SymLoadStruct* firstStruct, bool tryplatform, const char* prefix, bool warnOnFailure) { return LoadSymbols(mLibrary, firstStruct, tryplatform ? mLookupFunc : nullptr, prefix, warnOnFailure); } PRFuncPtr GLLibraryLoader::LookupSymbol(PRLibrary* lib, const char* sym, PlatformLookupFunction lookupFunction) { PRFuncPtr res = 0; // try finding it in the library directly, if we have one if (lib) { res = PR_FindFunctionSymbol(lib, sym); } // then try looking it up via the lookup symbol if (!res && lookupFunction) { res = lookupFunction(sym); } // finally just try finding it in the process if (!res) { PRLibrary* leakedLibRef; res = PR_FindFunctionSymbolAndLibrary(sym, &leakedLibRef); } return res; } bool GLLibraryLoader::LoadSymbols(PRLibrary* lib, const SymLoadStruct* firstStruct, PlatformLookupFunction lookupFunction, const char* prefix, bool warnOnFailure) { char sbuf[MAX_SYMBOL_LENGTH * 2]; int failCount = 0; const SymLoadStruct* ss = firstStruct; while (ss->symPointer) { *ss->symPointer = 0; for (int i = 0; i < MAX_SYMBOL_NAMES; i++) { if (ss->symNames[i] == nullptr) break; const char* s = ss->symNames[i]; if (prefix && *prefix != 0) { strcpy(sbuf, prefix); strcat(sbuf, ss->symNames[i]); s = sbuf; } PRFuncPtr p = LookupSymbol(lib, s, lookupFunction); if (p) { *ss->symPointer = p; break; } } if (*ss->symPointer == 0) { if (warnOnFailure) { printf_stderr("Can't find symbol '%s'.\n", ss->symNames[0]); } failCount++; } ss++; } return failCount == 0 ? true : false; } } /* namespace gl */ } /* namespace mozilla */