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// Copyright (c) 2011 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.
#include "base/win/iunknown_impl.h"
namespace base {
namespace win {
IUnknownImpl::IUnknownImpl()
: ref_count_(0) {
}
IUnknownImpl::~IUnknownImpl() {
}
ULONG STDMETHODCALLTYPE IUnknownImpl::AddRef() {
base::AtomicRefCountInc(&ref_count_);
return 1;
}
ULONG STDMETHODCALLTYPE IUnknownImpl::Release() {
if (!base::AtomicRefCountDec(&ref_count_)) {
delete this;
return 0;
}
return 1;
}
STDMETHODIMP IUnknownImpl::QueryInterface(REFIID riid, void** ppv) {
if (riid == IID_IUnknown) {
*ppv = static_cast<IUnknown*>(this);
AddRef();
return S_OK;
}
*ppv = NULL;
return E_NOINTERFACE;
}
} // namespace win
} // namespace base
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