1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/accessible/src/windows/msaa/IUnknownImpl.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,186 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. *
1.9 + */
1.10 +
1.11 +#ifndef mozilla_a11y_IUnknownImpl_h_
1.12 +#define mozilla_a11y_IUnknownImpl_h_
1.13 +
1.14 +#include <windows.h>
1.15 +#undef CreateEvent // thank you windows you're such a helper
1.16 +#include "nsError.h"
1.17 +
1.18 +// Avoid warning C4509 like "nonstandard extension used:
1.19 +// 'AccessibleWrap::[acc_getName]' uses SEH and 'name' has destructor.
1.20 +// At this point we're catching a crash which is of much greater
1.21 +// importance than the missing dereference for the nsCOMPtr<>
1.22 +#ifdef _MSC_VER
1.23 +#pragma warning( disable : 4509 )
1.24 +#endif
1.25 +
1.26 +namespace mozilla {
1.27 +namespace a11y {
1.28 +
1.29 +class AutoRefCnt
1.30 +{
1.31 +public:
1.32 + AutoRefCnt() : mValue(0) {}
1.33 +
1.34 + ULONG operator++() { return ++mValue; }
1.35 + ULONG operator--() { return --mValue; }
1.36 + ULONG operator++(int) { return ++mValue; }
1.37 + ULONG operator--(int) { return --mValue; }
1.38 +
1.39 + operator ULONG() const { return mValue; }
1.40 +
1.41 +private:
1.42 + ULONG mValue;
1.43 +};
1.44 +
1.45 +} // namespace a11y
1.46 +} // namespace mozilla
1.47 +
1.48 +#define DECL_IUNKNOWN \
1.49 +public: \
1.50 + virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, void**); \
1.51 + virtual ULONG STDMETHODCALLTYPE AddRef() MOZ_FINAL \
1.52 + { \
1.53 + MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
1.54 + ++mRefCnt; \
1.55 + return mRefCnt; \
1.56 + } \
1.57 + virtual ULONG STDMETHODCALLTYPE Release() MOZ_FINAL \
1.58 + { \
1.59 + MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
1.60 + --mRefCnt; \
1.61 + if (mRefCnt) \
1.62 + return mRefCnt; \
1.63 + \
1.64 + delete this; \
1.65 + return 0; \
1.66 + } \
1.67 +private: \
1.68 + mozilla::a11y::AutoRefCnt mRefCnt; \
1.69 +public:
1.70 +
1.71 +#define DECL_IUNKNOWN_INHERITED \
1.72 +public: \
1.73 +virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, void**); \
1.74 +
1.75 +#define IMPL_IUNKNOWN_QUERY_HEAD(Class) \
1.76 +STDMETHODIMP \
1.77 +Class::QueryInterface(REFIID aIID, void** aInstancePtr) \
1.78 +{ \
1.79 + A11Y_TRYBLOCK_BEGIN \
1.80 + if (!aInstancePtr) \
1.81 + return E_INVALIDARG; \
1.82 + *aInstancePtr = nullptr; \
1.83 + \
1.84 + HRESULT hr = E_NOINTERFACE;
1.85 +
1.86 +#define IMPL_IUNKNOWN_QUERY_TAIL \
1.87 + return hr; \
1.88 + A11Y_TRYBLOCK_END \
1.89 +}
1.90 +
1.91 +#define IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(Member) \
1.92 + return Member->QueryInterface(aIID, aInstancePtr); \
1.93 + A11Y_TRYBLOCK_END \
1.94 +}
1.95 +
1.96 +#define IMPL_IUNKNOWN_QUERY_TAIL_INHERITED(BaseClass) \
1.97 + return BaseClass::QueryInterface(aIID, aInstancePtr); \
1.98 + A11Y_TRYBLOCK_END \
1.99 +}
1.100 +
1.101 +#define IMPL_IUNKNOWN_QUERY_IFACE(Iface) \
1.102 + if (aIID == IID_##Iface) { \
1.103 + *aInstancePtr = static_cast<Iface*>(this); \
1.104 + AddRef(); \
1.105 + return S_OK; \
1.106 + }
1.107 +
1.108 +#define IMPL_IUNKNOWN_QUERY_IFACE_AMBIGIOUS(Iface, aResolveIface) \
1.109 + if (aIID == IID_##Iface) { \
1.110 + *aInstancePtr = static_cast<Iface*>(static_cast<aResolveIface*>(this)); \
1.111 + AddRef(); \
1.112 + return S_OK; \
1.113 + }
1.114 +
1.115 +#define IMPL_IUNKNOWN_QUERY_CLASS(Class) \
1.116 + hr = Class::QueryInterface(aIID, aInstancePtr); \
1.117 + if (SUCCEEDED(hr)) \
1.118 + return hr;
1.119 +
1.120 +#define IMPL_IUNKNOWN_QUERY_CLASS_COND(Class, Cond) \
1.121 + if (Cond) { \
1.122 + hr = Class::QueryInterface(aIID, aInstancePtr); \
1.123 + if (SUCCEEDED(hr)) \
1.124 + return hr; \
1.125 + }
1.126 +
1.127 +#define IMPL_IUNKNOWN_QUERY_AGGR_COND(Member, Cond) \
1.128 + if (Cond) { \
1.129 + hr = Member->QueryInterface(aIID, aInstancePtr); \
1.130 + if (SUCCEEDED(hr)) \
1.131 + return hr; \
1.132 + }
1.133 +
1.134 +#define IMPL_IUNKNOWN1(Class, I1) \
1.135 + IMPL_IUNKNOWN_QUERY_HEAD(Class) \
1.136 + IMPL_IUNKNOWN_QUERY_IFACE(I1); \
1.137 + IMPL_IUNKNOWN_QUERY_IFACE(IUnknown); \
1.138 + IMPL_IUNKNOWN_QUERY_TAIL \
1.139 +
1.140 +#define IMPL_IUNKNOWN2(Class, I1, I2) \
1.141 + IMPL_IUNKNOWN_QUERY_HEAD(Class) \
1.142 + IMPL_IUNKNOWN_QUERY_IFACE(I1); \
1.143 + IMPL_IUNKNOWN_QUERY_IFACE(I2); \
1.144 + IMPL_IUNKNOWN_QUERY_IFACE_AMBIGIOUS(IUnknown, I1); \
1.145 + IMPL_IUNKNOWN_QUERY_TAIL \
1.146 +
1.147 +#define IMPL_IUNKNOWN_INHERITED1(Class, Super0, Super1) \
1.148 + IMPL_IUNKNOWN_QUERY_HEAD(Class) \
1.149 + IMPL_IUNKNOWN_QUERY_CLASS(Super1); \
1.150 + IMPL_IUNKNOWN_QUERY_TAIL_INHERITED(Super0)
1.151 +
1.152 +#define IMPL_IUNKNOWN_INHERITED2(Class, Super0, Super1, Super2) \
1.153 + IMPL_IUNKNOWN_QUERY_HEAD(Class) \
1.154 + IMPL_IUNKNOWN_QUERY_CLASS(Super1); \
1.155 + IMPL_IUNKNOWN_QUERY_CLASS(Super2); \
1.156 + IMPL_IUNKNOWN_QUERY_TAIL_INHERITED(Super0)
1.157 +
1.158 +
1.159 +/**
1.160 + * Wrap every method body by these macroses to pass exception to the crash
1.161 + * reporter.
1.162 + */
1.163 +#define A11Y_TRYBLOCK_BEGIN \
1.164 + MOZ_SEH_TRY {
1.165 +
1.166 +#define A11Y_TRYBLOCK_END \
1.167 + } MOZ_SEH_EXCEPT(mozilla::a11y::FilterExceptions(::GetExceptionCode(), \
1.168 + GetExceptionInformation())) \
1.169 + { } \
1.170 + return E_FAIL;
1.171 +
1.172 +
1.173 +namespace mozilla {
1.174 +namespace a11y {
1.175 +
1.176 +/**
1.177 + * Converts nsresult to HRESULT.
1.178 + */
1.179 +HRESULT GetHRESULT(nsresult aResult);
1.180 +
1.181 +/**
1.182 + * Used to pass an exception to the crash reporter.
1.183 + */
1.184 +int FilterExceptions(unsigned int aCode, EXCEPTION_POINTERS* aExceptionInfo);
1.185 +
1.186 +} // namespace a11y;
1.187 +} //namespace mozilla;
1.188 +
1.189 +#endif
