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// Copyright (c) 2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_INTERFACES_IPC_H
#define BITCOIN_INTERFACES_IPC_H
#include <functional>
#include <memory>
#include <typeindex>
namespace interfaces {
class Init;
//! Interface providing access to interprocess-communication (IPC)
//! functionality.
class Ipc
{
public:
virtual ~Ipc() = default;
//! Spawn a child process returning pointer to its Init interface.
virtual std::unique_ptr<Init> spawnProcess(const char* exe_name) = 0;
//! If this is a spawned process, block and handle requests from the parent
//! process by forwarding them to this process's Init interface, then return
//! true. If this is not a spawned child process, return false.
virtual bool startSpawnedProcess(int argc, char* argv[], int& exit_status) = 0;
//! Add cleanup callback to remote interface that will run when the
//! interface is deleted.
template<typename Interface>
void addCleanup(Interface& iface, std::function<void()> cleanup)
{
addCleanup(typeid(Interface), &iface, std::move(cleanup));
}
protected:
//! Internal implementation of public addCleanup method (above) as a
//! type-erased virtual function, since template functions can't be virtual.
virtual void addCleanup(std::type_index type, void* iface, std::function<void()> cleanup) = 0;
};
//! Return implementation of Ipc interface.
std::unique_ptr<Ipc> MakeIpc(const char* exe_name, const char* process_argv0, Init& init);
} // namespace interfaces
#endif // BITCOIN_INTERFACES_IPC_H
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