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/*
*
* This source code is part of
*
* G R O M A C S
*
* GROningen MAchine for Chemical Simulations
*
* VERSION 3.2.0
* Written by David van der Spoel, Erik Lindahl, Berk Hess, and others.
* Copyright (c) 1991-2000, University of Groningen, The Netherlands.
* Copyright (c) 2001-2004, The GROMACS development team,
* check out http://www.gromacs.org for more information.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* If you want to redistribute modifications, please consider that
* scientific software is very special. Version control is crucial -
* bugs must be traceable. We will be happy to consider code for
* inclusion in the official distribution, but derived work must not
* be called official GROMACS. Details are found in the README & COPYING
* files - if they are missing, get the official version at www.gromacs.org.
*
* To help us fund GROMACS development, we humbly ask that you cite
* the papers on the package - you can find them in the top README file.
*
* For more info, check our website at http://www.gromacs.org
*
* And Hey:
* GROwing Monsters And Cloning Shrimps
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "typedefs.h"
#include "gmx_fatal.h"
#include "sighandler.h"
const char *gmx_stop_cond_name[] =
{
"None",
"Stop at the next neighbor search step",
"Stop at the next step",
"Abort"
};
/* these do not neccesarily match the stop condition, but are
referred to in the signal handler. */
const char *gmx_signal_name[] =
{
"None",
"INT",
"TERM",
"second INT/TERM",
"remote INT/TERM",
"remote second INT/TERM",
"USR1",
"Abort"
};
static volatile sig_atomic_t stop_condition=gmx_stop_cond_none;
static volatile sig_atomic_t last_signal_name=0;
static volatile sig_atomic_t usr_condition=0;
static RETSIGTYPE signal_handler(int n)
{
switch (n) {
/* windows doesn't do SIGINT correctly according to ANSI (yes, signals are in
ANSI C89, and windows spawns a thread specifically to run the INT signal
handler), but that doesn't matter for a simple signal handler like this. */
case SIGTERM:
case SIGINT:
/* we explicitly set things up to allow this: */
stop_condition++;
if (n==SIGINT)
last_signal_name=1;
if (n==SIGTERM)
last_signal_name=2;
if (stop_condition == gmx_stop_cond_next)
last_signal_name=3;
if (stop_condition >= gmx_stop_cond_abort)
abort();
break;
#ifdef HAVE_SIGUSR1
case SIGUSR1:
usr_condition=1;
break;
#endif
default:
break;
}
}
void signal_handler_install(void)
{
if (getenv("GMX_NO_TERM") == NULL)
{
if (debug)
{
fprintf(debug,"Installing signal handler for SIGTERM\n");
}
signal(SIGTERM,signal_handler);
}
if (getenv("GMX_NO_INT") == NULL)
{
if (debug)
{
fprintf(debug,"Installing signal handler for SIGINT\n");
}
signal(SIGINT,signal_handler);
}
#ifdef HAVE_SIGUSR1
if (getenv("GMX_NO_USR1") == NULL)
{
if (debug)
{
fprintf(debug,"Installing signal handler for SIGUSR1\n");
}
signal(SIGUSR1,signal_handler);
}
#endif
}
gmx_stop_cond_t gmx_get_stop_condition(void)
{
return (gmx_stop_cond_t)stop_condition;
}
void gmx_set_stop_condition(gmx_stop_cond_t recvd_stop_cond)
{
if (recvd_stop_cond > stop_condition)
{
stop_condition=recvd_stop_cond;
if (stop_condition == gmx_stop_cond_next_ns)
last_signal_name=4;
if (stop_condition == gmx_stop_cond_next)
last_signal_name=5;
}
}
const char *gmx_get_signal_name(void)
{
return gmx_signal_name[last_signal_name];
}
gmx_bool gmx_got_usr_signal(void)
{
#ifdef HAVE_SIGUSR1
gmx_bool ret=(gmx_bool)usr_condition;
usr_condition=0;
return ret;
#else
return FALSE;
#endif
}
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