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 "mozilla/gfx/Logging.h"
  10 #include "nsDebug.h"
  11
  12 #ifdef WIN32
  13 #  include <windows.h>
  14 #endif
  15
  16 namespace mozilla {
  17 namespace gl {
  18
  19 void ClearSymbols(const SymLoadStruct* const firstStruct) {
  20   for (auto itr = firstStruct; itr->symPointer; ++itr) {
  21     *itr->symPointer = nullptr;
  22   }
  23 }
  24
  25 bool SymbolLoader::LoadSymbols(const SymLoadStruct* const firstStruct,
  26                                const bool warnOnFailures) const {
  27   bool ok = true;
  28
  29   for (auto itr = firstStruct; itr->symPointer; ++itr) {
  30     *itr->symPointer = nullptr;
  31
  32     for (const auto& s : itr->symNames) {
  33       if (!s) break;
  34
  35       const auto p = GetProcAddress(s);
  36       if (p) {
  37         *itr->symPointer = p;
  38         break;
  39       }
  40     }
  41
  42     if (!*itr->symPointer) {
  43       if (warnOnFailures) {
  44         printf_stderr("Can't find symbol '%s'.\n", itr->symNames[0]);
  45       }
  46       ok = false;
  47     }
  48   }
  49
  50   return ok;
  51 }
  52
  53 // -
  54
  55 PRFuncPtr SymbolLoader::GetProcAddress(const char* const name) const {
  56 #ifdef DEBUG
  57   static const std::regex kRESymbol("[a-z].*");
  58   if (!std::regex_match(name, kRESymbol)) {
  59     gfxCriticalError() << "Bad symbol name : " << name;
  60   }
  61 #endif
  62
  63   PRFuncPtr ret = nullptr;
  64   if (!ret && mLib) {
  65     ret = PR_FindFunctionSymbol(mLib, name);
  66   }
  67   if (!ret && mPfn) {
  68     ret = mPfn(name);
  69   }
  70   return ret;
  71 }
  72
  73 }  // namespace gl
  74 }  // namespace mozilla