base/scoped_native_library.cc

   1 // Copyright (c) 2011 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/scoped_native_library.h"
   6
   7 namespace base {
   8
   9 ScopedNativeLibrary::ScopedNativeLibrary() : library_(NULL) {
  10 }
  11
  12 ScopedNativeLibrary::ScopedNativeLibrary(NativeLibrary library)
  13     : library_(library) {
  14 }
  15
  16 ScopedNativeLibrary::ScopedNativeLibrary(const FilePath& library_path) {
  17   library_ = base::LoadNativeLibrary(library_path, NULL);
  18 }
  19
  20 ScopedNativeLibrary::~ScopedNativeLibrary() {
  21   if (library_)
  22     base::UnloadNativeLibrary(library_);
  23 }
  24
  25 void* ScopedNativeLibrary::GetFunctionPointer(
  26     const char* function_name) const {
  27   if (!library_)
  28     return NULL;
  29   return base::GetFunctionPointerFromNativeLibrary(library_, function_name);
  30 }
  31
  32 void ScopedNativeLibrary::Reset(NativeLibrary library) {
  33   if (library_)
  34     base::UnloadNativeLibrary(library_);
  35   library_ = library;
  36 }
  37
  38 NativeLibrary ScopedNativeLibrary::Release() {
  39   NativeLibrary result = library_;
  40   library_ = NULL;
  41   return result;
  42 }
  43
  44 }  // namespace base