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/********************* */
/*! \file time_limit.h
** \verbatim
** Top contributors (to current version):
** Gereon Kremer
** This file is part of the CVC4 project.
** Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
** in the top-level source directory and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief Implementation of time limits.
**
** Implementation of time limits that are imposed by the --tlimit option.
**/
#ifndef CVC5__MAIN__TIME_LIMIT_H
#define CVC5__MAIN__TIME_LIMIT_H
#include "options/options.h"
namespace cvc5 {
namespace main {
/**
* This class makes sure that the main thread signals back to the time
* limit mechanism when it wants to terminate. This is necessary if we
* use our custom std::thread-based timers. Following RAII, we signal
* this using a destructor so that we can never forget to abort the time
* limit thread.
*/
struct TimeLimit
{
~TimeLimit();
};
/**
* Installs an overall wall-clock time limit for the solver binary.
* It retrieves the time limit and creates a POSIX timer (via setitimer()).
* This timer signals its expiration with an SIGALRM that is handled by
* timeout_handler() in signal_handler.cpp.
* If the POSIX timers are not available (e.g., we are running on windows)
* we implement our own timer based on std::thread. In this case, the main
* thread needs to communicate back to the timer thread when it wants to
* terminate, which is done via the TimeLimit object.
*/
TimeLimit install_time_limit(const Options& opts);
} // namespace main
} // namespace cvc5
#endif /* CVC5__MAIN__TIME_LIMIT_H */
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