mirror of
https://github.com/robbert-vdh/yabridge.git
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Robbert van der Helm
91 lines
3.0 KiB
C++
91 lines
3.0 KiB
C++
// yabridge: a Wine VST bridge
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// Copyright (C) 2020 Robbert van der Helm
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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#pragma once
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#include <bitsery/traits/string.h>
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#include <cstddef>
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#include <cstdint>
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#include <type_traits>
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// The plugin should always be compiled to a 64-bit version, but the host
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// application can also be 32-bit to allow using 32-bit legacy Windows VST in a
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// modern Linux VST host. Because of this we have to make sure to always use
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// 64-bit integers in places where we would otherwise use `size_t` and
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// `intptr_t`. Otherwise the binary serialization would break. The 64 <-> 32 bit
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// conversion for the 32-bit host application won't cause any issues for us
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// since we can't directly pass pointers between the plugin and the host anyway.
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#ifndef __WINE__
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// Sanity check for the plugin, both the 64 and 32 bit hosts should follow these
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// conventions
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static_assert(std::is_same_v<size_t, uint64_t>);
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static_assert(std::is_same_v<intptr_t, int64_t>);
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#endif
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using native_size_t = uint64_t;
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using native_intptr_t = int64_t;
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// The cannonical overloading template for `std::visitor`, not sure why this
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// isn't part of the standard library
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template <class... Ts>
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struct overload : Ts... {
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using Ts::operator()...;
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};
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template <class... Ts>
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overload(Ts...) -> overload<Ts...>;
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/**
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* An object containing the startup options for hosting a plugin in a plugin
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* group process. These are the exact same options that would have been passed
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* to `yabridge-host.exe` were the plugin to be hosted individually.
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*/
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struct GroupRequest {
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std::string plugin_path;
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std::string endpoint_base_dir;
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template <typename S>
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void serialize(S& s) {
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s.text1b(plugin_path, 4096);
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s.text1b(endpoint_base_dir, 4096);
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}
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};
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template <>
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struct std::hash<GroupRequest> {
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std::size_t operator()(GroupRequest const& params) const noexcept {
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std::hash<string> hasher{};
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return hasher(params.plugin_path) ^
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(hasher(params.endpoint_base_dir) << 1);
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}
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};
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/**
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* The response sent back after the group host process receives a `GroupRequest`
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* object. This only holds the group process's PID because we need to know if
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* the group process crashes while it is initializing the plugin to prevent us
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* from waiting indefinitely for the socket to be connected to.
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*/
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struct GroupResponse {
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pid_t pid;
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template <typename S>
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void serialize(S& s) {
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s.value4b(pid);
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}
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};
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