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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* A type that can be sent without needing to make a copy during
* serialization. In addition the receiver can take ownership of the
* data to avoid having to make an additional copy. */
#ifndef mozilla_ipc_ByteBuf_h
#define mozilla_ipc_ByteBuf_h
#include "mozilla/Assertions.h"
namespace IPC {
template <typename T>
struct ParamTraits;
}
namespace mozilla {
namespace ipc {
class ByteBuf final {
friend struct IPC::ParamTraits<mozilla::ipc::ByteBuf>;
public:
bool Allocate(size_t aLength) {
MOZ_ASSERT(mData == nullptr);
mData = (uint8_t*)malloc(aLength);
if (!mData) {
return false;
}
mLen = aLength;
mCapacity = aLength;
return true;
}
ByteBuf() : mData(nullptr), mLen(0), mCapacity(0) {}
ByteBuf(uint8_t* aData, size_t aLen, size_t aCapacity)
: mData(aData), mLen(aLen), mCapacity(aCapacity) {}
ByteBuf(const ByteBuf& aFrom) = delete;
ByteBuf(ByteBuf&& aFrom)
: mData(aFrom.mData), mLen(aFrom.mLen), mCapacity(aFrom.mCapacity) {
aFrom.mData = nullptr;
aFrom.mLen = 0;
aFrom.mCapacity = 0;
}
ByteBuf& operator=(ByteBuf&& aFrom) {
std::swap(mData, aFrom.mData);
std::swap(mLen, aFrom.mLen);
std::swap(mCapacity, aFrom.mCapacity);
return *this;
}
~ByteBuf() { free(mData); }
uint8_t* mData;
size_t mLen;
size_t mCapacity;
};
} // namespace ipc
} // namespace mozilla
#endif // ifndef mozilla_ipc_ByteBuf_h