зеркало из https://github.com/mozilla/gecko-dev.git
72 строки
1.7 KiB
C++
72 строки
1.7 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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/* A type that can be sent without needing to make a copy during
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* serialization. In addition the receiver can take ownership of the
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* data to avoid having to make an additional copy. */
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#ifndef mozilla_ipc_ByteBuf_h
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#define mozilla_ipc_ByteBuf_h
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#include "mozilla/Assertions.h"
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namespace IPC {
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template <typename T>
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struct ParamTraits;
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}
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namespace mozilla {
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namespace ipc {
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class ByteBuf final {
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friend struct IPC::ParamTraits<mozilla::ipc::ByteBuf>;
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public:
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bool Allocate(size_t aLength) {
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MOZ_ASSERT(mData == nullptr);
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mData = (uint8_t*)malloc(aLength);
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if (!mData) {
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return false;
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}
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mLen = aLength;
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mCapacity = aLength;
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return true;
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}
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ByteBuf() : mData(nullptr), mLen(0), mCapacity(0) {}
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ByteBuf(uint8_t* aData, size_t aLen, size_t aCapacity)
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: mData(aData), mLen(aLen), mCapacity(aCapacity) {}
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ByteBuf(const ByteBuf& aFrom) = delete;
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ByteBuf(ByteBuf&& aFrom)
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: mData(aFrom.mData), mLen(aFrom.mLen), mCapacity(aFrom.mCapacity) {
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aFrom.mData = nullptr;
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aFrom.mLen = 0;
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aFrom.mCapacity = 0;
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}
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ByteBuf& operator=(ByteBuf&& aFrom) {
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std::swap(mData, aFrom.mData);
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std::swap(mLen, aFrom.mLen);
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std::swap(mCapacity, aFrom.mCapacity);
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return *this;
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}
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~ByteBuf() { free(mData); }
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uint8_t* mData;
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size_t mLen;
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size_t mCapacity;
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};
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} // namespace ipc
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} // namespace mozilla
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#endif // ifndef mozilla_ipc_ByteBuf_h
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