168 lines
7.9 KiB
C++
168 lines
7.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. *
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*/
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#ifndef mozilla_a11y_IUnknownImpl_h_
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#define mozilla_a11y_IUnknownImpl_h_
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#include <windows.h>
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#undef CreateEvent // thank you windows you're such a helper
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#include "nsError.h"
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// Avoid warning C4509 like "nonstandard extension used:
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// 'AccessibleWrap::[acc_getName]' uses SEH and 'name' has destructor.
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// At this point we're catching a crash which is of much greater
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// importance than the missing dereference for the nsCOMPtr<>
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#ifdef _MSC_VER
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#pragma warning( disable : 4509 )
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#endif
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#ifdef __GNUC__
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#define ATTRIBUTE_UNUSED __attribute__((unused))
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#else
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#define ATTRIBUTE_UNUSED
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#endif
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namespace mozilla {
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namespace a11y {
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class AutoRefCnt
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{
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public:
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AutoRefCnt() : mValue(0) {}
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ULONG operator++() { return ++mValue; }
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ULONG operator--() { return --mValue; }
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ULONG operator++(int) { return ++mValue; }
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ULONG operator--(int) { return --mValue; }
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operator ULONG() const { return mValue; }
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private:
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ULONG mValue;
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};
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} // namespace a11y
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} // namespace mozilla
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#define DECL_IUNKNOWN \
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public: \
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, void**); \
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virtual ULONG STDMETHODCALLTYPE AddRef() final \
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{ \
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MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
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++mRefCnt; \
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return mRefCnt; \
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} \
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virtual ULONG STDMETHODCALLTYPE Release() final \
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{ \
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MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
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--mRefCnt; \
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if (mRefCnt) \
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return mRefCnt; \
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\
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delete this; \
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return 0; \
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} \
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private: \
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mozilla::a11y::AutoRefCnt mRefCnt; \
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public:
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#define DECL_IUNKNOWN_INHERITED \
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public: \
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virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, void**); \
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#define IMPL_IUNKNOWN_QUERY_HEAD(Class) \
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STDMETHODIMP \
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Class::QueryInterface(REFIID aIID, void** aInstancePtr) \
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{ \
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if (!aInstancePtr) \
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return E_INVALIDARG; \
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*aInstancePtr = nullptr; \
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\
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HRESULT hr ATTRIBUTE_UNUSED = E_NOINTERFACE;
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#define IMPL_IUNKNOWN_QUERY_TAIL \
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return hr; \
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}
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#define IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(Member) \
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return Member->QueryInterface(aIID, aInstancePtr); \
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}
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#define IMPL_IUNKNOWN_QUERY_TAIL_INHERITED(BaseClass) \
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return BaseClass::QueryInterface(aIID, aInstancePtr); \
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}
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#define IMPL_IUNKNOWN_QUERY_IFACE(Iface) \
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if (aIID == IID_##Iface) { \
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*aInstancePtr = static_cast<Iface*>(this); \
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AddRef(); \
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return S_OK; \
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}
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#define IMPL_IUNKNOWN_QUERY_IFACE_AMBIGIOUS(Iface, aResolveIface) \
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if (aIID == IID_##Iface) { \
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*aInstancePtr = static_cast<Iface*>(static_cast<aResolveIface*>(this)); \
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AddRef(); \
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return S_OK; \
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}
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#define IMPL_IUNKNOWN_QUERY_CLASS(Class) \
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hr = Class::QueryInterface(aIID, aInstancePtr); \
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if (SUCCEEDED(hr)) \
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return hr;
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#define IMPL_IUNKNOWN_QUERY_CLASS_COND(Class, Cond) \
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if (Cond) { \
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hr = Class::QueryInterface(aIID, aInstancePtr); \
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if (SUCCEEDED(hr)) \
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return hr; \
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}
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#define IMPL_IUNKNOWN_QUERY_AGGR_COND(Member, Cond) \
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if (Cond) { \
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hr = Member->QueryInterface(aIID, aInstancePtr); \
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if (SUCCEEDED(hr)) \
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return hr; \
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}
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#define IMPL_IUNKNOWN1(Class, I1) \
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IMPL_IUNKNOWN_QUERY_HEAD(Class) \
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IMPL_IUNKNOWN_QUERY_IFACE(I1); \
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IMPL_IUNKNOWN_QUERY_IFACE(IUnknown); \
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IMPL_IUNKNOWN_QUERY_TAIL \
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#define IMPL_IUNKNOWN2(Class, I1, I2) \
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IMPL_IUNKNOWN_QUERY_HEAD(Class) \
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IMPL_IUNKNOWN_QUERY_IFACE(I1); \
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IMPL_IUNKNOWN_QUERY_IFACE(I2); \
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IMPL_IUNKNOWN_QUERY_IFACE_AMBIGIOUS(IUnknown, I1); \
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IMPL_IUNKNOWN_QUERY_TAIL \
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#define IMPL_IUNKNOWN_INHERITED1(Class, Super0, Super1) \
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IMPL_IUNKNOWN_QUERY_HEAD(Class) \
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IMPL_IUNKNOWN_QUERY_CLASS(Super1); \
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IMPL_IUNKNOWN_QUERY_TAIL_INHERITED(Super0)
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#define IMPL_IUNKNOWN_INHERITED2(Class, Super0, Super1, Super2) \
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IMPL_IUNKNOWN_QUERY_HEAD(Class) \
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IMPL_IUNKNOWN_QUERY_CLASS(Super1); \
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IMPL_IUNKNOWN_QUERY_CLASS(Super2); \
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IMPL_IUNKNOWN_QUERY_TAIL_INHERITED(Super0)
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namespace mozilla {
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namespace a11y {
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/**
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* Converts nsresult to HRESULT.
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*/
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HRESULT GetHRESULT(nsresult aResult);
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} // namespace a11y;
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} //namespace mozilla;
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#endif
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