| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_MAC_SCOPED_IOPLUGININTERFACE_H_ |
| #define BASE_MAC_SCOPED_IOPLUGININTERFACE_H_ |
| |
| #include <IOKit/IOKitLib.h> |
| |
| #include "base/basictypes.h" |
| #include "base/compiler_specific.h" |
| |
| namespace base { |
| namespace mac { |
| |
| // Just like ScopedCFTypeRef but for IOCFPlugInInterface and friends |
| // (IOUSBInterfaceStruct and IOUSBDeviceStruct320 in particular). |
| template<typename T> |
| class ScopedIOPluginInterface { |
| public: |
| typedef T** InterfaceT; |
| typedef InterfaceT element_type; |
| |
| explicit ScopedIOPluginInterface(InterfaceT object = NULL) |
| : object_(object) { |
| } |
| |
| ~ScopedIOPluginInterface() { |
| if (object_) |
| (*object_)->Release(object_); |
| } |
| |
| void reset(InterfaceT object = NULL) { |
| if (object_) |
| (*object_)->Release(object_); |
| object_ = object; |
| } |
| |
| bool operator==(InterfaceT that) const { |
| return object_ == that; |
| } |
| |
| bool operator!=(InterfaceT that) const { |
| return object_ != that; |
| } |
| |
| operator InterfaceT() const { |
| return object_; |
| } |
| |
| InterfaceT get() const { |
| return object_; |
| } |
| |
| void swap(ScopedIOPluginInterface& that) { |
| InterfaceT temp = that.object_; |
| that.object_ = object_; |
| object_ = temp; |
| } |
| |
| InterfaceT release() WARN_UNUSED_RESULT { |
| InterfaceT temp = object_; |
| object_ = NULL; |
| return temp; |
| } |
| |
| private: |
| InterfaceT object_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ScopedIOPluginInterface); |
| }; |
| |
| } // namespace mac |
| } // namespace base |
| |
| #endif // BASE_MAC_SCOPED_IOPLUGININTERFACE_H_ |