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git-subtree-dir: src/ipc/libmultiprocess git-subtree-split: 35944ffd23fa26652b82210351d50e896ce16c8f
113 lines
3.8 KiB
C++
113 lines
3.8 KiB
C++
// Copyright (c) 2025 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef MP_PROXY_TYPE_POINTER_H
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#define MP_PROXY_TYPE_POINTER_H
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#include <mp/util.h>
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namespace mp {
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template <typename LocalType, typename Value, typename Output>
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void CustomBuildField(TypeList<LocalType*>, Priority<3>, InvokeContext& invoke_context, Value&& value, Output&& output)
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{
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if (value) {
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BuildField(TypeList<LocalType>(), invoke_context, output, *value);
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}
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}
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template <typename LocalType, typename Value, typename Output>
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void CustomBuildField(TypeList<std::shared_ptr<LocalType>>,
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Priority<1>,
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InvokeContext& invoke_context,
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Value&& value,
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Output&& output)
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{
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if (value) {
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BuildField(TypeList<LocalType>(), invoke_context, output, *value);
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}
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}
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template <typename LocalType, typename Input, typename ReadDest>
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decltype(auto) CustomReadField(TypeList<LocalType*>,
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Priority<1>,
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InvokeContext& invoke_context,
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Input&& input,
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ReadDest&& read_dest)
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{
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return read_dest.update([&](auto& value) {
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if (value) {
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ReadField(TypeList<LocalType>(), invoke_context, std::forward<Input>(input), ReadDestUpdate(*value));
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}
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});
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}
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template <typename LocalType, typename Input, typename ReadDest>
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decltype(auto) CustomReadField(TypeList<std::shared_ptr<LocalType>>,
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Priority<0>,
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InvokeContext& invoke_context,
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Input&& input,
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ReadDest&& read_dest)
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{
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return read_dest.update([&](auto& value) {
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if (!input.has()) {
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value.reset();
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} else if (value) {
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ReadField(TypeList<LocalType>(), invoke_context, input, ReadDestUpdate(*value));
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} else {
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ReadField(TypeList<LocalType>(), invoke_context, input,
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ReadDestEmplace(TypeList<LocalType>(), [&](auto&&... args) -> auto& {
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value = std::make_shared<LocalType>(std::forward<decltype(args)>(args)...);
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return *value;
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}));
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}
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});
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}
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template <typename LocalType, typename Input, typename ReadDest>
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decltype(auto) CustomReadField(TypeList<std::shared_ptr<const LocalType>>,
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Priority<1>,
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InvokeContext& invoke_context,
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Input&& input,
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ReadDest&& read_dest)
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{
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return read_dest.update([&](auto& value) {
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if (!input.has()) {
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value.reset();
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return;
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}
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ReadField(TypeList<LocalType>(), invoke_context, std::forward<Input>(input),
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ReadDestEmplace(TypeList<LocalType>(), [&](auto&&... args) -> auto& {
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value = std::make_shared<LocalType>(std::forward<decltype(args)>(args)...);
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return *value;
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}));
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});
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}
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//! PassField override for C++ pointer arguments.
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template <typename Accessor, typename LocalType, typename ServerContext, typename Fn, typename... Args>
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void PassField(Priority<1>, TypeList<LocalType*>, ServerContext& server_context, const Fn& fn, Args&&... args)
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{
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const auto& params = server_context.call_context.getParams();
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const auto& input = Make<StructField, Accessor>(params);
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if (!input.want()) {
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fn.invoke(server_context, std::forward<Args>(args)..., nullptr);
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return;
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}
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InvokeContext& invoke_context = server_context;
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Decay<LocalType> param;
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MaybeReadField(std::integral_constant<bool, Accessor::in>(), TypeList<LocalType>(), invoke_context, input,
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ReadDestUpdate(param));
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fn.invoke(server_context, std::forward<Args>(args)..., ¶m);
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auto&& results = server_context.call_context.getResults();
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MaybeBuildField(std::integral_constant<bool, Accessor::out>(), TypeList<LocalType>(), invoke_context,
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Make<StructField, Accessor>(results), param);
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}
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} // namespace mp
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#endif // MP_PROXY_TYPE_POINTER_H
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