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      1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "base/native_library.h"
      6 
      7 #include <windows.h>
      8 
      9 #include "base/file_util.h"
     10 #include "base/string_util.h"
     11 
     12 namespace base {
     13 
     14 // static
     15 NativeLibrary LoadNativeLibrary(const FilePath& library_path) {
     16   // Switch the current directory to the library directory as the library
     17   // may have dependencies on DLLs in this directory.
     18   bool restore_directory = false;
     19   FilePath current_directory;
     20   if (file_util::GetCurrentDirectory(&current_directory)) {
     21     FilePath plugin_path = library_path.DirName();
     22     if (!plugin_path.empty()) {
     23       file_util::SetCurrentDirectory(plugin_path);
     24       restore_directory = true;
     25     }
     26   }
     27 
     28   HMODULE module = LoadLibrary(library_path.value().c_str());
     29   if (restore_directory)
     30     file_util::SetCurrentDirectory(current_directory);
     31 
     32   return module;
     33 }
     34 
     35 // static
     36 void UnloadNativeLibrary(NativeLibrary library) {
     37   FreeLibrary(library);
     38 }
     39 
     40 // static
     41 void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
     42                                           const char* name) {
     43   return GetProcAddress(library, name);
     44 }
     45 
     46 // static
     47 string16 GetNativeLibraryName(const string16& name) {
     48   return name + ASCIIToUTF16(".dll");
     49 }
     50 
     51 }  // namespace base
     52