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40 #include "sighandler.h"
47 #include "gromacs/utility/fatalerror.h"
49 const char* gmx_stop_cond_name[] = { "None", "Stop at the next neighbor search step",
50 "Stop at the next step", "Abort" };
52 /* these do not neccesarily match the stop condition, but are
53 referred to in the signal handler. */
54 static const char* gmx_signal_name[] = {
55 "None", "INT", "TERM", "second INT/TERM", "remote INT/TERM", "remote second INT/TERM",
59 static volatile sig_atomic_t stop_condition = gmx_stop_cond_none;
60 static volatile sig_atomic_t last_signal_name = 0;
62 static volatile sig_atomic_t usr_condition = 0;
64 void gmx_reset_stop_condition()
66 stop_condition = gmx_stop_cond_none;
67 // last_signal_name and usr_condition are left untouched by reset.
70 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: */
89 if (stop_condition == gmx_stop_cond_next)
93 if (stop_condition >= gmx_stop_cond_abort)
99 case SIGUSR1: usr_condition = 1; break;
105 static void gmx_signal(int signum)
108 struct sigaction act;
109 act.sa_handler = signal_handler;
110 sigemptyset(&act.sa_mask);
111 act.sa_flags = SA_RESTART;
112 sigaction(signum, &act, nullptr);
114 signal(signum, signal_handler);
118 void signal_handler_install()
120 if (getenv("GMX_NO_TERM") == nullptr)
124 fprintf(debug, "Installing signal handler for SIGTERM\n");
128 if (getenv("GMX_NO_INT") == nullptr)
132 fprintf(debug, "Installing signal handler for SIGINT\n");
137 if (getenv("GMX_NO_USR1") == nullptr)
141 fprintf(debug, "Installing signal handler for SIGUSR1\n");
148 gmx_stop_cond_t gmx_get_stop_condition()
150 return static_cast<gmx_stop_cond_t>(stop_condition);
153 void gmx_set_stop_condition(gmx_stop_cond_t recvd_stop_cond)
155 if (recvd_stop_cond > stop_condition)
157 stop_condition = recvd_stop_cond;
158 if (stop_condition == gmx_stop_cond_next_ns)
160 last_signal_name = 4;
162 if (stop_condition == gmx_stop_cond_next)
164 last_signal_name = 5;
169 const char* gmx_get_signal_name()
171 return gmx_signal_name[last_signal_name];
174 gmx_bool gmx_got_usr_signal()
177 gmx_bool ret = static_cast<gmx_bool>(usr_condition);