int
ngx_http_lua_coroutine_create_helper(lua_State *L, ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx, ngx_http_lua_co_ctx_t **pcoctx)
{
lua_State *vm; /* the Lua VM */
lua_State *co; /* new coroutine to be created */
ngx_http_lua_co_ctx_t *coctx; /* co ctx for the new coroutine */
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,
"Lua function expected");
ngx_http_lua_check_context(L, ctx, NGX_HTTP_LUA_CONTEXT_REWRITE
| NGX_HTTP_LUA_CONTEXT_ACCESS
| NGX_HTTP_LUA_CONTEXT_CONTENT
| NGX_HTTP_LUA_CONTEXT_TIMER);
vm = ngx_http_lua_get_lua_vm(r, ctx);
/* create new coroutine on root Lua state, so it always yields
* to main Lua thread
*/
co = lua_newthread(vm);
ngx_http_lua_probe_user_coroutine_create(r, L, co);
coctx = ngx_http_lua_create_co_ctx(r, ctx);
if (coctx == NULL) {
return luaL_error(L, "out of memory");
}
coctx->co = co;
coctx->co_status = NGX_HTTP_LUA_CO_SUSPENDED;
/* make new coroutine share globals of the parent coroutine.
* NOTE: globals don't have to be separated! */
lua_pushvalue(L, LUA_GLOBALSINDEX);
lua_xmove(L, co, 1);
lua_replace(co, LUA_GLOBALSINDEX);
lua_xmove(vm, L, 1); /* move coroutine from main thread to L */
lua_pushvalue(L, 1); /* copy entry function to top of L*/
lua_xmove(L, co, 1); /* move entry function from L to co */
if (pcoctx) {
*pcoctx = coctx;
}
return 1; /* return new coroutine to Lua */
}
static int
ngx_http_lua_coroutine_create(lua_State *L)
{
lua_State *mt; /* the main thread */
lua_State *co; /* new coroutine to be created */
ngx_http_request_t *r;
ngx_http_lua_main_conf_t *lmcf;
ngx_http_lua_ctx_t *ctx;
ngx_http_lua_co_ctx_t *coctx; /* co ctx for the new coroutine */
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,
"Lua function expected");
lua_pushlightuserdata(L, &ngx_http_lua_request_key);
lua_rawget(L, LUA_GLOBALSINDEX);
r = lua_touserdata(L, -1);
lua_pop(L, 1);
if (r == NULL) {
return luaL_error(L, "no request found");
}
ctx = ngx_http_get_module_ctx(r, ngx_http_lua_module);
if (ctx == NULL) {
return luaL_error(L, "no request ctx found");
}
ngx_http_lua_check_context(L, ctx, NGX_HTTP_LUA_CONTEXT_REWRITE
| NGX_HTTP_LUA_CONTEXT_ACCESS
| NGX_HTTP_LUA_CONTEXT_CONTENT);
lmcf = ngx_http_get_module_main_conf(r, ngx_http_lua_module);
mt = lmcf->lua;
/* create new coroutine on root Lua state, so it always yields
* to main Lua thread
*/
co = lua_newthread(mt);
ngx_http_lua_probe_user_coroutine_create(r, L, co);
coctx = ngx_http_lua_create_co_ctx(r, ctx);
if (coctx == NULL) {
return luaL_error(L, "out of memory");
}
coctx->co = co;
coctx->co_status = NGX_HTTP_LUA_CO_SUSPENDED;
/* make new coroutine share globals of the parent coroutine.
* NOTE: globals don't have to be separated! */
lua_pushvalue(L, LUA_GLOBALSINDEX);
lua_xmove(L, co, 1);
lua_replace(co, LUA_GLOBALSINDEX);
lua_xmove(mt, L, 1); /* move coroutine from main thread to L */
lua_pushvalue(L, 1); /* copy entry function to top of L*/
lua_xmove(L, co, 1); /* move entry function from L to co */
return 1; /* return new coroutine to Lua */
}
int
ngx_http_lua_coroutine_create_helper(lua_State *L, ngx_http_request_t *r,
ngx_http_lua_ctx_t *ctx, ngx_http_lua_co_ctx_t **pcoctx)
{
lua_State *vm; /* the Lua VM */
lua_State *co; /* new coroutine to be created */
ngx_http_lua_co_ctx_t *coctx; /* co ctx for the new coroutine */
luaL_argcheck(L, lua_isfunction(L, 1) && !lua_iscfunction(L, 1), 1,
"Lua function expected");
ngx_http_lua_check_context(L, ctx, NGX_HTTP_LUA_CONTEXT_REWRITE
| NGX_HTTP_LUA_CONTEXT_ACCESS
| NGX_HTTP_LUA_CONTEXT_CONTENT
| NGX_HTTP_LUA_CONTEXT_TIMER
| NGX_HTTP_LUA_CONTEXT_SSL_CERT);
vm = ngx_http_lua_get_lua_vm(r, ctx);
/* create new coroutine on root Lua state, so it always yields
* to main Lua thread
*/
co = lua_newthread(vm);
ngx_http_lua_probe_user_coroutine_create(r, L, co);
coctx = ngx_http_lua_get_co_ctx(co, ctx);
if (coctx == NULL) {
coctx = ngx_http_lua_create_co_ctx(r, ctx);
if (coctx == NULL) {
return luaL_error(L, "no memory");
}
} else {
ngx_memzero(coctx, sizeof(ngx_http_lua_co_ctx_t));
coctx->co_ref = LUA_NOREF;
}
coctx->co = co;
coctx->co_status = NGX_HTTP_LUA_CO_SUSPENDED;
/* make new coroutine share globals of the parent coroutine.
* NOTE: globals don't have to be separated! */
ngx_http_lua_get_globals_table(L);
lua_xmove(L, co, 1);
ngx_http_lua_set_globals_table(co);
lua_xmove(vm, L, 1); /* move coroutine from main thread to L */
lua_pushvalue(L, 1); /* copy entry function to top of L*/
lua_xmove(L, co, 1); /* move entry function from L to co */
if (pcoctx) {
*pcoctx = coctx;
}
#ifdef NGX_LUA_USE_ASSERT
coctx->co_top = 1;
#endif
return 1; /* return new coroutine to Lua */
}
