1ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsen// Copyright (c) 2011 The Chromium Authors. All rights reserved. 2c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// Use of this source code is governed by a BSD-style license that can be 3c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// found in the LICENSE file. 4c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 5ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsen#ifndef BASE_MEMORY_SCOPED_NATIVE_LIBRARY_H_ 6ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsen#define BASE_MEMORY_SCOPED_NATIVE_LIBRARY_H_ 73345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick#pragma once 8c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 9ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsen#include "base/base_api.h" 10c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch#include "base/native_library.h" 11c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 123345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrickclass FilePath; 133345a6884c488ff3a535c2c9acdd33d74b37e311Iain Merrick 14c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdochnamespace base { 15c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 16c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// A class which encapsulates a base::NativeLibrary object available only in a 17c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// scope. 18c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch// This class automatically unloads the loaded library in its destructor. 19ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsenclass BASE_API ScopedNativeLibrary { 20c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch public: 214a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch // Initializes with a NULL library. 224a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch ScopedNativeLibrary(); 23c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 244a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch // Takes ownership of the given library handle. 254a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch explicit ScopedNativeLibrary(NativeLibrary library); 26c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 274a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch // Opens the given library and manages its lifetime. 284a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch explicit ScopedNativeLibrary(const FilePath& library_path); 294a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch 304a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch ~ScopedNativeLibrary(); 314a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch 324a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch // Returns true if there's a valid library loaded. 334a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch bool is_valid() const { return !!library_; } 344a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch 354a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch void* GetFunctionPointer(const char* function_name) const; 364a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch 374a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch // Takes ownership of the given library handle. Any existing handle will 384a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch // be freed. 394a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch void Reset(NativeLibrary library); 404a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch 414a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch // Returns the native library handle and removes it from this object. The 424a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch // caller must manage the lifetime of the handle. 434a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch NativeLibrary Release(); 44c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 45c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch private: 464a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch NativeLibrary library_; 474a5e2dc747d50c653511c68ccb2cfbfb740bd5a7Ben Murdoch 48c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch DISALLOW_COPY_AND_ASSIGN(ScopedNativeLibrary); 49c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch}; 50c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 51c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch} // namespace base 52c407dc5cd9bdc5668497f21b26b09d988ab439deBen Murdoch 53ddb351dbec246cf1fab5ec20d2d5520909041de1Kristian Monsen#endif // BASE_MEMORY_SCOPED_NATIVE_LIBRARY_H_ 54