зеркало из https://github.com/mozilla/gecko-dev.git
100 строки
2.5 KiB
C++
100 строки
2.5 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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#ifndef mozilla_mscom_ProxyStream_h
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#define mozilla_mscom_ProxyStream_h
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#include "ipc/IPCMessageUtils.h"
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#include "mozilla/mscom/Ptr.h"
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#include "mozilla/RefPtr.h"
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#include "mozilla/TypedEnumBits.h"
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#include "mozilla/UniquePtr.h"
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namespace mozilla {
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namespace mscom {
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enum class ProxyStreamFlags : uint32_t
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{
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eDefault = 0,
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// When ePreservable is set on a ProxyStream, its caller *must* call
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// GetPreservableStream() before the ProxyStream is destroyed.
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ePreservable = 1
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};
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MOZ_MAKE_ENUM_CLASS_BITWISE_OPERATORS(ProxyStreamFlags);
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class ProxyStream final
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{
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public:
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class MOZ_RAII Environment
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{
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public:
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virtual ~Environment() = default;
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virtual bool Push() = 0;
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virtual bool Pop() = 0;
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};
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class MOZ_RAII DefaultEnvironment : public Environment
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{
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public:
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bool Push() override { return true; }
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bool Pop() override { return true; }
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};
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ProxyStream();
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ProxyStream(REFIID aIID, IUnknown* aObject, Environment* aEnv,
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ProxyStreamFlags aFlags = ProxyStreamFlags::eDefault);
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ProxyStream(REFIID aIID, const BYTE* aInitBuf, const int aInitBufSize,
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Environment* aEnv);
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~ProxyStream();
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// Not copyable because this would mess up the COM marshaling.
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ProxyStream(const ProxyStream& aOther) = delete;
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ProxyStream& operator=(const ProxyStream& aOther) = delete;
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ProxyStream(ProxyStream&& aOther);
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ProxyStream& operator=(ProxyStream&& aOther);
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inline bool IsValid() const
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{
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return !(mUnmarshaledProxy && mStream);
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}
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bool GetInterface(void** aOutInterface);
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const BYTE* GetBuffer(int& aReturnedBufSize) const;
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PreservedStreamPtr GetPreservedStream();
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bool operator==(const ProxyStream& aOther) const
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{
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return this == &aOther;
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}
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private:
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RefPtr<IStream> mStream;
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BYTE* mGlobalLockedBuf;
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HGLOBAL mHGlobal;
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int mBufSize;
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ProxyUniquePtr<IUnknown> mUnmarshaledProxy;
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bool mPreserveStream;
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};
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namespace detail {
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template <typename Interface>
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struct EnvironmentSelector
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{
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typedef ProxyStream::DefaultEnvironment Type;
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};
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} // namespace detail
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} // namespace mscom
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} // namespace mozilla
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#endif // mozilla_mscom_ProxyStream_h
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