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