Function tryagain

3rd/lua-5.4.3/src/lmem.c:148–156

** In case of allocation fail, this function will do an emergency ** collection to free some memory and then try the allocation again. ** The GC should not be called while state is not fully built, as the ** collector is not yet fully initialized. Also, it should not be called ** when 'gcstopem' is true, because then the interpreter is in the ** middle of a collection step. */

** middle of a collection step.
*/
static void *tryagain (lua_State *L, void *block,
                       size_t osize, size_t nsize) {
  global_State *g = G(L);
  if (completestate(g) && !g->gcstopem) {
    luaC_fullgc(L, 1);  /* try to free some memory... */
    return (*g->frealloc)(g->ud, block, osize, nsize);  /* try again */
  }
  else return NULL;  /* cannot free any memory without a full state */
}


/*