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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)
75 /* windows doesn't do SIGINT correctly according to ANSI (yes, signals are in
76 ANSI C89, and windows spawns a thread specifically to run the INT signal
77 handler), but that doesn't matter for a simple signal handler like this. */
80 /* we explicitly set things up to allow this: */
90 if (stop_condition == gmx_stop_cond_next)
94 if (stop_condition >= gmx_stop_cond_abort)
109 static void gmx_signal(int signum)
111 #ifdef HAVE_SIGACTION
112 struct sigaction act;
113 act.sa_handler = signal_handler;
114 sigemptyset(&act.sa_mask);
115 act.sa_flags = SA_RESTART;
116 sigaction(signum, &act, NULL);
118 signal(signum, signal_handler);
122 void signal_handler_install(void)
124 if (getenv("GMX_NO_TERM") == NULL)
128 fprintf(debug, "Installing signal handler for SIGTERM\n");
132 if (getenv("GMX_NO_INT") == NULL)
136 fprintf(debug, "Installing signal handler for SIGINT\n");
141 if (getenv("GMX_NO_USR1") == NULL)
145 fprintf(debug, "Installing signal handler for SIGUSR1\n");
152 gmx_stop_cond_t gmx_get_stop_condition(void)
154 return (gmx_stop_cond_t)stop_condition;
157 void gmx_set_stop_condition(gmx_stop_cond_t recvd_stop_cond)
159 if (recvd_stop_cond > stop_condition)
161 stop_condition = recvd_stop_cond;
162 if (stop_condition == gmx_stop_cond_next_ns)
164 last_signal_name = 4;
166 if (stop_condition == gmx_stop_cond_next)
168 last_signal_name = 5;
173 const char *gmx_get_signal_name(void)
175 return gmx_signal_name[last_signal_name];
178 gmx_bool gmx_got_usr_signal(void)
181 gmx_bool ret = (gmx_bool)usr_condition;