63 lines
2.0 KiB
C++
63 lines
2.0 KiB
C++
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <folly/io/IOBuf.h>
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#include <folly/io/async/AsyncTransport.h>
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#include <folly/io/async/DecoratedAsyncTransportWrapper.h>
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namespace folly {
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/**
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* Helper class that redirects write() and writev() calls to writeChain().
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*/
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template <class T>
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class WriteChainAsyncTransportWrapper
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: public DecoratedAsyncTransportWrapper<T> {
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public:
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using DecoratedAsyncTransportWrapper<T>::DecoratedAsyncTransportWrapper;
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void write(
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folly::AsyncTransportWrapper::WriteCallback* callback,
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const void* buf,
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size_t bytes,
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folly::WriteFlags flags = folly::WriteFlags::NONE) override {
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auto ioBuf = folly::IOBuf::wrapBuffer(buf, bytes);
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writeChain(callback, std::move(ioBuf), flags);
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}
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void writev(
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folly::AsyncTransportWrapper::WriteCallback* callback,
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const iovec* vec,
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size_t count,
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folly::WriteFlags flags = folly::WriteFlags::NONE) override {
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auto writeBuffer = folly::IOBuf::wrapIov(vec, count);
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writeChain(callback, std::move(writeBuffer), flags);
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}
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/**
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* It only makes sense to use this class if you override writeChain, so force
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* derived classes to do that.
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*/
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void writeChain(
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folly::AsyncTransportWrapper::WriteCallback* callback,
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std::unique_ptr<folly::IOBuf>&& buf,
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folly::WriteFlags flags = folly::WriteFlags::NONE) override = 0;
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};
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} // namespace folly
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