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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#ifndef mozilla_ipc_RustMessageUtils_h
#define mozilla_ipc_RustMessageUtils_h
#include "chrome/common/ipc_message_utils.h"
// Some macros for rust integrations. See ipc/rust/ipdl_utils
#define MOZ_DEFINE_RUST_PARAMTRAITS(type_, serializer_, deserializer_) \
extern "C" uint8_t* serializer_(const type_*, size_t* len, size_t* cap); \
extern "C" bool deserializer_(const uint8_t*, size_t len, type_*); \
\
template <> \
struct IPC::ParamTraits<type_> { \
using paramType = type_; \
static void Write(IPC::MessageWriter* aWriter, const paramType& aParam) { \
size_t len, cap; \
uint8_t* buf = serializer_(&aParam, &cap, &len); \
MOZ_DIAGNOSTIC_ASSERT(buf, #type_ " serialization failed"); \
WriteParam(aWriter, mozilla::ipc::ByteBuf(buf, len, cap)); \
} \
static IPC::ReadResult<paramType> Read(IPC::MessageReader* aReader) { \
mozilla::ipc::ByteBuf in; \
IPC::ReadResult<paramType> result; \
if (!ReadParam(aReader, &in) || !in.mData) { \
return result; \
} \
/* TODO: Should be able to initialize `result` in-place instead */ \
mozilla::AlignedStorage2<paramType> value; \
if (!deserializer_(in.mData, in.mLen, value.addr())) { \
return result; \
} \
result = std::move(*value.addr()); \
value.addr()->~paramType(); \
return result; \
} \
};
#endif
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