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Fix bug of GC in fd and timeout objects for lua binding.

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fd and timeout lua object has a __gc method in its metatable. After the object
is freed and the another new object use the same reference in __uloop_cb and
__uloop_fds, the new object will be freed by the old __gc of the old object
when garbag collecting.

Signed-off-by: Xiongfei(Alex) Guo <xfguo@credosemi.com>
This commit is contained in:
Xiongfei Guo 2014-06-20 10:31:21 +00:00 committed by John Crispin
parent 3c92274bee
commit 39a8fae441
1 changed files with 22 additions and 3 deletions
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21
lua/uloop.c
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@ -79,6 +79,13 @@ static int ul_timer_free(lua_State *L)
struct lua_uloop_timeout *tout = lua_touserdata(L, 1);
uloop_timeout_cancel(&tout->t);
/* obj.__index.__gc = nil , make sure executing only once*/
lua_getfield(L, -1, "__index");
lua_pushstring(L, "__gc");
lua_pushnil(L);
lua_settable(L, -3);
lua_getglobal(state, "__uloop_cb");
luaL_unref(state, -1, tout->r);
@ -150,7 +157,6 @@ static void ul_ufd_cb(struct uloop_fd *fd, unsigned int events)
/* push events */
lua_pushinteger(state, events);
lua_call(state, 2, 0);
}
@ -178,6 +184,12 @@ static int ul_ufd_delete(lua_State *L)
uloop_fd_delete(&ufd->fd);
/* obj.__index.__gc = nil , make sure executing only once*/
lua_getfield(L, -1, "__index");
lua_pushstring(L, "__gc");
lua_pushnil(L);
lua_settable(L, -3);
lua_getglobal(state, "__uloop_cb");
luaL_unref(state, -1, ufd->r);
lua_remove(state, -1);
@ -345,12 +357,19 @@ static int ul_run(lua_State *L)
return 1;
}
static int ul_end(lua_State *L)
{
uloop_end();
return 1;
}
static luaL_reg uloop_func[] = {
{"init", ul_init},
{"run", ul_run},
{"timer", ul_timer},
{"process", ul_process},
{"fd_add", ul_ufd_add},
{"end", ul_end},
{NULL, NULL},
};