signalinterrupt.h

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// Copyright (c) 2023 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_UTIL_SIGNALINTERRUPT_H
#define BITCOIN_UTIL_SIGNALINTERRUPT_H
 
#ifdef WIN32
#include <condition_variable>
#include <mutex>
#else
#include <util/tokenpipe.h>
#endif
 
#include <atomic>
#include <cstdlib>
 
namespace util {
class SignalInterrupt
{
public:
    SignalInterrupt();
    explicit operator bool() const;
    [[nodiscard]] bool operator()();
    [[nodiscard]] bool reset();
    [[nodiscard]] bool wait();
 
private:
    std::atomic<bool> m_flag;
 
#ifndef WIN32
    // On UNIX-like operating systems use the self-pipe trick.
    TokenPipeEnd m_pipe_r;
    TokenPipeEnd m_pipe_w;
#else
    // On windows use a condition variable, since we don't have any signals there
    std::mutex m_mutex;
    std::condition_variable m_cv;
#endif
};
} // namespace util
 
#endif // BITCOIN_UTIL_SIGNALINTERRUPT_H