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Lua: using newthread()

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This commit is contained in:
Jan Maria Matejka 2018-01-23 16:32:12 +01:00
parent 0810bba8b4
commit 6c83ad1861
1 changed files with 24 additions and 8 deletions
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32
lua/filter.c
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@ -9,6 +9,22 @@
/* Docs: http://pgl.yoyo.org/luai/i/luaL_dostring */
static lua_State *global_lua_state = NULL;
static inline lua_State * luaB_getstate(void) {
if (!global_lua_state) {
lua_State *L = luaL_newstate();
luaL_openlibs(L);
global_lua_state = L;
}
return lua_newthread(global_lua_state);
}
static inline void luaB_close(lua_State *L UNUSED) {
lua_pop(global_lua_state, 1);
}
struct lua_new_filter_writer_data {
struct lua_filter_chunk *first, *last;
};
@ -40,12 +56,11 @@ struct filter * lua_new_filter(struct f_inst *inst) {
return NULL;
}
lua_State *L = luaL_newstate();
luaL_openlibs(L);
lua_State *L = luaB_getstate();
int loadres = luaL_loadstring(L, string.val.s);
switch (loadres) {
case LUA_ERRMEM:
lua_close(L);
luaB_close(L);
cf_error("Memory allocation error occured when loading lua chunk");
return NULL;
case LUA_ERRSYNTAX:
@ -53,7 +68,7 @@ struct filter * lua_new_filter(struct f_inst *inst) {
const char *e = lua_tostring(L, -1);
char *ec = cfg_alloc(strlen(e) + 1);
strcpy(ec, e);
lua_close(L);
luaB_close(L);
cf_error("Lua syntax error: %s", ec);
return NULL;
}
@ -63,7 +78,7 @@ struct filter * lua_new_filter(struct f_inst *inst) {
struct lua_new_filter_writer_data lnfwd = {};
lua_dump(L, lua_new_filter_writer, &lnfwd, 0); /* No error to handle */
lua_close(L);
luaB_close(L);
f->lua_chunk = lnfwd.first;
return f;
@ -81,10 +96,11 @@ static const char *lua_interpret_reader(lua_State *L UNUSED, void *ud, size_t *s
}
struct f_val lua_interpret(struct lua_filter_chunk *chunk, struct rte **e, struct rta **a, struct ea_list **ea, struct linpool *lp, int flags) {
lua_State *L = luaL_newstate();
luaL_openlibs(L);
lua_State *L = luaB_getstate();
lua_bird_state *lbs = luaB_init(L, lp);
luaB_push_route(L, *e);
struct lua_filter_chunk **rptr = &chunk;
lua_load(L, lua_interpret_reader, rptr, "", "b");
int le = lua_pcall(L, 0, LUA_MULTRET, 0);
@ -101,7 +117,7 @@ struct f_val lua_interpret(struct lua_filter_chunk *chunk, struct rte **e, struc
out = F_VAL(T_RETURN, i, F_ERROR);
}
lua_close(L);
luaB_close(L);
return out;
}