Function lua_resume

third-party/lua-5.1.5/src/ldo.c:418–441

LUA_API int lua_resume (lua_State *L, int nargs) {
  int status;
  lua_lock(L);
  if (L->status != LUA_YIELD && (L->status != 0 || L->ci != L->base_ci))
      return resume_error(L, "cannot resume non-suspended coroutine");
  if (L->nCcalls >= LUAI_MAXCCALLS)
    return resume_error(L, "C stack overflow");
  luai_userstateresume(L, nargs);
  lua_assert(L->errfunc == 0);
  L->baseCcalls = ++L->nCcalls;
  status = luaD_rawrunprotected(L, resume, L->top - nargs);
  if (status != 0) {  /* error? */
    L->status = cast_byte(status);  /* mark thread as `dead' */
    luaD_seterrorobj(L, status, L->top);
    L->ci->top = L->top;
  }
  else {
    lua_assert(L->nCcalls == L->baseCcalls);
    status = L->status;
  }
  --L->nCcalls;
  lua_unlock(L);
  return status;
}


LUA_API int lua_yield (lua_State *L, int nresults) {