gfx/gl/GLLibraryLoader.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
   3  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 #include "GLLibraryLoader.h"
   6
   7 #include <regex>
   8
   9 #include "nsDebug.h"
  10
  11 #ifdef WIN32
  12 #  include <windows.h>
  13 #endif
  14
  15 namespace mozilla {
  16 namespace gl {
  17
  18 void ClearSymbols(const SymLoadStruct* const firstStruct) {
  19   for (auto itr = firstStruct; itr->symPointer; ++itr) {
  20     *itr->symPointer = nullptr;
  21   }
  22 }
  23
  24 bool SymbolLoader::LoadSymbols(const SymLoadStruct* const firstStruct,
  25                                const bool warnOnFailures) const {
  26   bool ok = true;
  27
  28   for (auto itr = firstStruct; itr->symPointer; ++itr) {
  29     *itr->symPointer = nullptr;
  30
  31     for (const auto& s : itr->symNames) {
  32       if (!s) break;
  33
  34       const auto p = GetProcAddress(s);
  35       if (p) {
  36         *itr->symPointer = p;
  37         break;
  38       }
  39     }
  40
  41     if (!*itr->symPointer) {
  42       if (warnOnFailures) {
  43         printf_stderr("Can't find symbol '%s'.\n", itr->symNames[0]);
  44       }
  45       ok = false;
  46     }
  47   }
  48
  49   return ok;
  50 }
  51
  52 // -
  53
  54 PRFuncPtr SymbolLoader::GetProcAddress(const char* const name) const {
  55 #ifdef DEBUG
  56   static const std::regex kRESymbol("[a-z].*");
  57   if (!std::regex_match(name, kRESymbol)) {
  58     gfxCriticalError() << "Bad symbol name : " << name;
  59   }
  60 #endif
  61
  62   PRFuncPtr ret = nullptr;
  63   if (!ret && mLib) {
  64     ret = PR_FindFunctionSymbol(mLib, name);
  65   }
  66   if (!ret && mPfn) {
  67     ret = mPfn(name);
  68   }
  69   return ret;
  70 }
  71
  72 } // namespace gl
  73 } // namespace mozilla