Beginning refactoring of the event_callback outside of the core

1 files changed, 56 insertions, 0 deletions

diff --git a/src/event_callback.c b/src/event_callback.c
new file mode 100644
index 0000000..7f9bc37
--- /dev/null
+++ b/src/event_callback.c
@@ -0,0 +1,56 @@
+#include "event_callback.h"
+#include <assert.h>
+#include <lauxlib.h>
+
+void freeCallbackArgs(le_callback* arg, lua_State* L) {
+	if(arg->base) {
+		arg->base = NULL;
+		event_del(&arg->ev);
+		luaL_unref(L, LUA_REGISTRYINDEX, arg->callbackRef);
+	}
+}
+/* le_callback is allocated at the beginning of the coroutine in which it
+is used, no need to manually de-allocate */
+
+/* Index for coroutine is fd as integer for *nix, as lightuserdata for Win */
+void luaevent_callback(int fd, short event, void* p) {
+	le_callback* arg = p;
+	lua_State* L;
+	int ret;
+	assert(arg && arg->base && arg->base->loop_L);
+	L = arg->base->loop_L;
+	lua_rawgeti(L, LUA_REGISTRYINDEX, arg->callbackRef);
+	lua_pushinteger(L, event);
+	lua_call(L, 1, 1);
+	ret = lua_tointeger(L, -1);
+	lua_pop(L, 1);
+	if(ret == -1) {
+		freeCallbackArgs(arg, L);
+	} else {
+		struct event *ev = &arg->ev;
+		int newEvent = ret;
+		if(newEvent != event) { // Need to hook up new event...
+			event_del(ev);
+			event_set(ev, fd, EV_PERSIST | newEvent, luaevent_callback, arg);
+			event_add(ev, NULL);
+		}
+	}
+}
+
+static int luaevent_cb_gc(lua_State* L) {
+	le_callback* arg = luaL_checkudata(L, 1, EVENT_CALLBACK_ARG_MT);
+	freeCallbackArgs(arg, L);
+	return 0;
+}
+
+int event_callback_register(lua_State* L) {
+	luaL_newmetatable(L, EVENT_CALLBACK_ARG_MT);
+	lua_pushcfunction(L, luaevent_cb_gc);
+	lua_setfield(L, -2, "__gc");
+	lua_newtable(L);
+	lua_pushcfunction(L, luaevent_cb_gc);
+	lua_setfield(L, -2, "close");
+	lua_setfield(L, -2, "__index");
+	lua_pop(L, 1);
+	return 0;
+}