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.
5 #ifndef BASE_SCOPED_NATIVE_LIBRARY_H_
6 #define BASE_SCOPED_NATIVE_LIBRARY_H_
8 #include "base/base_export.h"
9 #include "base/macros.h"
10 #include "base/native_library.h"
16 // A class which encapsulates a base::NativeLibrary object available only in a
18 // This class automatically unloads the loaded library in its destructor.
19 class BASE_EXPORT ScopedNativeLibrary {
21 // Initializes with a NULL library.
22 ScopedNativeLibrary();
24 // Takes ownership of the given library handle.
25 explicit ScopedNativeLibrary(NativeLibrary library);
27 // Opens the given library and manages its lifetime.
28 explicit ScopedNativeLibrary(const FilePath& library_path);
30 ~ScopedNativeLibrary();
32 // Returns true if there's a valid library loaded.
33 bool is_valid() const { return !!library_; }
35 NativeLibrary get() const { return library_; }
37 void* GetFunctionPointer(const char* function_name) const;
39 // Takes ownership of the given library handle. Any existing handle will
41 void Reset(NativeLibrary library);
43 // Returns the native library handle and removes it from this object. The
44 // caller must manage the lifetime of the handle.
45 NativeLibrary Release();
48 NativeLibrary library_;
50 DISALLOW_COPY_AND_ASSIGN(ScopedNativeLibrary);
55 #endif // BASE_SCOPED_NATIVE_LIBRARY_H_