101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
/*
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* Scyther : An automatic verifier for security protocols.
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* Copyright (C) 2007-2012 Cas Cremers
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "timer.h"
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#include "system.h"
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#include "switches.h"
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#include "symbol.h"
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#include "arachne.h"
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/*
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* Timer functions
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*
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* Currently, this only works under linux (where the linux macro is defined by the compiler). Otherwise, it simply assumes the timer is never passed.
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*/
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#ifdef linux
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#include <time.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <sys/times.h>
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static clock_t endwait = 0;
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#endif
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static int time_max_seconds = 0;
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//! Set initial time limit.
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/**
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* <= 0 means none.
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*/
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void
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set_time_limit (int seconds)
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{
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if (seconds > 0)
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{
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time_max_seconds = seconds;
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#ifdef linux
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endwait = seconds * sysconf (_SC_CLK_TCK);
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#endif
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}
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else
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{
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time_max_seconds = 0;
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#ifdef linux
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endwait = 0;
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#endif
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}
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}
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//! Retrieve time limit
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int
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get_time_limit ()
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{
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return time_max_seconds;
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}
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//! Check whether time limit has passed.
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int
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passed_time_limit ()
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{
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#ifdef linux
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if (endwait <= 0)
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{
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return 0;
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}
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else
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{
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struct tms t;
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times (&t);
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if ((t.tms_utime + t.tms_stime) > endwait)
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return 1;
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else if (switches.output == PROOF)
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{
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indentPrint ();
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eprintf ("Clockticks per second: %jd\tTicks passed: %jd\n",
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(intmax_t) (sysconf (_SC_CLK_TCK)),
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(intmax_t) (t.tms_utime + t.tms_stime));
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}
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return 0;
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}
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#else
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return 0;
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#endif
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}
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