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40 #include "gmx_fatal.h"
41 #include "sighandler.h"
44 const char *gmx_stop_cond_name[] =
47 "Stop at the next neighbor search step",
48 "Stop at the next step",
52 /* these do not neccesarily match the stop condition, but are
53 referred to in the signal handler. */
54 const char *gmx_signal_name[] =
61 "remote second INT/TERM",
66 static volatile sig_atomic_t stop_condition=gmx_stop_cond_none;
67 static volatile sig_atomic_t last_signal_name=0;
69 static volatile sig_atomic_t usr_condition=0;
71 static void signal_handler(int n)
74 /* windows doesn't do SIGINT correctly according to ANSI (yes, signals are in
75 ANSI C89, and windows spawns a thread specifically to run the INT signal
76 handler), but that doesn't matter for a simple signal handler like this. */
79 /* we explicitly set things up to allow this: */
85 if (stop_condition == gmx_stop_cond_next)
87 if (stop_condition >= gmx_stop_cond_abort)
100 static void gmx_signal(int signum)
102 #ifdef HAVE_SIGACTION
103 struct sigaction act;
104 act.sa_handler = signal_handler;
105 sigemptyset(&act.sa_mask);
106 act.sa_flags = SA_RESTART;
107 sigaction(signum,&act,NULL);
109 signal(signum,signal_handler);
113 void signal_handler_install(void)
115 if (getenv("GMX_NO_TERM") == NULL)
119 fprintf(debug,"Installing signal handler for SIGTERM\n");
123 if (getenv("GMX_NO_INT") == NULL)
127 fprintf(debug,"Installing signal handler for SIGINT\n");
132 if (getenv("GMX_NO_USR1") == NULL)
136 fprintf(debug,"Installing signal handler for SIGUSR1\n");
143 gmx_stop_cond_t gmx_get_stop_condition(void)
145 return (gmx_stop_cond_t)stop_condition;
148 void gmx_set_stop_condition(gmx_stop_cond_t recvd_stop_cond)
150 if (recvd_stop_cond > stop_condition)
152 stop_condition=recvd_stop_cond;
153 if (stop_condition == gmx_stop_cond_next_ns)
155 if (stop_condition == gmx_stop_cond_next)
160 const char *gmx_get_signal_name(void)
162 return gmx_signal_name[last_signal_name];
165 gmx_bool gmx_got_usr_signal(void)
168 gmx_bool ret=(gmx_bool)usr_condition;