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53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
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// Copyright (c) 2023 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 BITCOIN_UTIL_SIGNALINTERRUPT_H
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#define BITCOIN_UTIL_SIGNALINTERRUPT_H
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#ifdef WIN32
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#include <condition_variable>
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#include <mutex>
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#else
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#include <util/tokenpipe.h>
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#endif
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#include <atomic>
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#include <cstdlib>
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namespace util {
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/**
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* Helper class that manages an interrupt flag, and allows a thread or
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* signal to interrupt another thread.
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*
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* This class is safe to be used in a signal handler. If sending an interrupt
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* from a signal handler is not necessary, the more lightweight \ref
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* CThreadInterrupt class can be used instead.
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*/
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class SignalInterrupt
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{
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public:
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SignalInterrupt();
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explicit operator bool() const;
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void operator()();
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void reset();
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void wait();
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private:
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std::atomic<bool> m_flag;
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#ifndef WIN32
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// On UNIX-like operating systems use the self-pipe trick.
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TokenPipeEnd m_pipe_r;
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TokenPipeEnd m_pipe_w;
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#else
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// On windows use a condition variable, since we don't have any signals there
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std::mutex m_mutex;
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std::condition_variable m_cv;
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#endif
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};
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} // namespace util
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#endif // BITCOIN_UTIL_SIGNALINTERRUPT_H
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