die.c

   1 /*
   2  * Subject to the GPL, version 2.
   3  */
   4
   5 #include "xmalloc.h"
   6
   7 struct panic_handler {
   8         void *arg;
   9         pid_t pid;
  10         bool is_enabled;
  11         void (*on_panic)(void *arg);
  12         struct panic_handler *next;
  13 };
  14
  15 static struct panic_handler *panic_handlers;
  16
  17 void panic_handler_add(void (*on_panic)(void *arg), void *arg)
  18 {
  19         struct panic_handler *handler = xmallocz(sizeof(*handler));
  20
  21         handler->arg            = arg;
  22         handler->pid            = getpid();
  23         handler->is_enabled     = true;
  24         handler->on_panic       = on_panic;
  25         handler->next           = panic_handlers;
  26         panic_handlers          = handler;
  27 };
  28
  29 void call_panic_handlers(void)
  30 {
  31         struct panic_handler *it;
  32         pid_t pid = getpid();
  33
  34         for (it = panic_handlers; it; it = it->next) {
  35                 if (it->pid == pid && it->is_enabled) {
  36                         it->is_enabled = false;
  37                         it->on_panic(it->arg);
  38                 }
  39         }
  40 }