react
__printf(1, 0) void (*react)(const char *msg, va_list args);
__printf(1, 0) void (*react)(const char *msg, va_list args);
react(curr_state, event);
react(curr_state, event);
.react = rv_panic_reaction
.react = rv_printk_reaction
mon->react = reactor->react;
.react = rv_nop_reaction
if (!rv_reacting_on() || !monitor->react)
monitor->react(msg, args);