native_library_win.cc revision 3345a6884c488ff3a535c2c9acdd33d74b37e311 
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/utf_string_conversions.h"
11
12namespace base {
13
14// static
15NativeLibrary 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
36void UnloadNativeLibrary(NativeLibrary library) {
37  FreeLibrary(library);
38}
39
40// static
41void* GetFunctionPointerFromNativeLibrary(NativeLibrary library,
42                                          const char* name) {
43  return GetProcAddress(library, name);
44}
45
46// static
47string16 GetNativeLibraryName(const string16& name) {
48  return name + ASCIIToUTF16(".dll");
49}
50
51}  // namespace base
52