Function luaC_step

third-party/lua-5.2.4/src/lgc.c:1177–1181

** performs a basic GC step only if collector is running */

** performs a basic GC step only if collector is running
*/
void luaC_step (lua_State *L) {
  global_State *g = G(L);
  if (g->gcrunning) luaC_forcestep(L);
  else luaE_setdebt(g, -GCSTEPSIZE);  /* avoid being called too often */
}