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// 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_IOOBJECT_H_
#define BASE_MAC_SCOPED_IOOBJECT_H_
#include <IOKit/IOKitLib.h>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
namespace base {
namespace mac {
// Just like ScopedCFTypeRef but for io_object_t and subclasses.
template<typename IOT>
class ScopedIOObject {
public:
typedef IOT element_type;
explicit ScopedIOObject(IOT object = IO_OBJECT_NULL)
: object_(object) {
}
~ScopedIOObject() {
if (object_)
IOObjectRelease(object_);
}
void reset(IOT object = IO_OBJECT_NULL) {
if (object_)
IOObjectRelease(object_);
object_ = object;
}
bool operator==(IOT that) const {
return object_ == that;
}
bool operator!=(IOT that) const {
return object_ != that;
}
operator IOT() const {
return object_;
}
IOT get() const {
return object_;
}
void swap(ScopedIOObject& that) {
IOT temp = that.object_;
that.object_ = object_;
object_ = temp;
}
IOT release() WARN_UNUSED_RESULT {
IOT temp = object_;
object_ = IO_OBJECT_NULL;
return temp;
}
private:
IOT object_;
DISALLOW_COPY_AND_ASSIGN(ScopedIOObject);
};
} // namespace mac
} // namespace base
#endif // BASE_MAC_SCOPED_IOOBJECT_H_
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