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