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 #ifndef BASE_MEMORY_SCOPED_NATIVE_LIBRARY_H_ 6 #define BASE_MEMORY_SCOPED_NATIVE_LIBRARY_H_ 7 #pragma once 8 9 #include "base/base_api.h" 10 #include "base/native_library.h" 11 12 class FilePath; 13 14 namespace base { 15 16 // A class which encapsulates a base::NativeLibrary object available only in a 17 // scope. 18 // This class automatically unloads the loaded library in its destructor. 19 class BASE_API ScopedNativeLibrary { 20 public: 21 // Initializes with a NULL library. 22 ScopedNativeLibrary(); 23 24 // Takes ownership of the given library handle. 25 explicit ScopedNativeLibrary(NativeLibrary library); 26 27 // Opens the given library and manages its lifetime. 28 explicit ScopedNativeLibrary(const FilePath& library_path); 29 30 ~ScopedNativeLibrary(); 31 32 // Returns true if there's a valid library loaded. 33 bool is_valid() const { return !!library_; } 34 35 void* GetFunctionPointer(const char* function_name) const; 36 37 // Takes ownership of the given library handle. Any existing handle will 38 // be freed. 39 void Reset(NativeLibrary library); 40 41 // Returns the native library handle and removes it from this object. The 42 // caller must manage the lifetime of the handle. 43 NativeLibrary Release(); 44 45 private: 46 NativeLibrary library_; 47 48 DISALLOW_COPY_AND_ASSIGN(ScopedNativeLibrary); 49 }; 50 51 } // namespace base 52 53 #endif // BASE_MEMORY_SCOPED_NATIVE_LIBRARY_H_ 54
