Function lua_sethook

lib/lua/src/ldebug.c:131–142

** This function can be called during a signal, under "reasonable" ** assumptions. ** Fields 'basehookcount' and 'hookcount' (set by 'resethookcount') ** are for debug only, and it is no problem if they get arbitrary ** values (causes at most one wrong hook call). 'hookmask' is an atomic ** value. We assume that pointers are atomic too (e.g., gcc ensures that ** for all platforms where it runs). M

** before being called (see 'luaD_hook').
*/
LUA_API void lua_sethook (lua_State *L, lua_Hook func, int mask, int count) {
  if (func == NULL || mask == 0) {  /* turn off hooks? */
    mask = 0;
    func = NULL;
  }
  L->hook = func;
  L->basehookcount = count;
  resethookcount(L);
  L->hookmask = cast_byte(mask);
  if (mask)
    settraps(L->ci);  /* to trace inside 'luaV_execute' */
}


LUA_API lua_Hook lua_gethook (lua_State *L) {