--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/luaevent/src/luaevent.c Sun Jun 10 16:01:26 2007 +0000
@@ -0,0 +1,164 @@
+#include "luaevent.h"
+
+#include <lua.h>
+#include <lauxlib.h>
+
+#define EVENT_BASE_MT "EVENT_BASE_MT"
+#define EVENT_CALLBACK_ARG_MT "EVENT_CALLBACK_ARG_MT"
+#define EVENT_BASE_LOCATION 1
+
+void setEventBase(lua_State* L, struct event_base* base) {
+ struct event_base** pbase = lua_newuserdata(L, sizeof(base));
+ *pbase = base;
+ luaL_getmetatable(L, EVENT_BASE_MT);
+ lua_setmetatable(L, -2);
+ lua_rawseti(L, LUA_ENVIRONINDEX, EVENT_BASE_LOCATION);
+}
+struct event_base* getEventBase(lua_State* L) {
+ struct event_base* base;
+ lua_rawgeti(L, LUA_ENVIRONINDEX, EVENT_BASE_LOCATION);
+ base = *(struct event_base**)lua_topointer(L, -1);
+ lua_pop(L, 1);
+ return base;
+}
+
+void freeCallbackArgs(le_callback* arg) {
+ if(arg->L) {
+ lua_State* L = arg->L;
+ arg->L = 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 */
+static void luaevent_callback(int fd, short event, void* p) {
+ le_callback* arg = p;
+ lua_State* L = arg->L;
+ int ret;
+ 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);
+ } 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_base_gc(lua_State* L) {
+ struct event_base** pbase = luaL_checkudata(L, 1, EVENT_BASE_MT);
+ if(*pbase) {
+ event_base_free(*pbase);
+ *pbase = NULL;
+ }
+ return 0;
+}
+
+static int luaevent_cb_gc(lua_State* L) {
+ le_callback* arg = luaL_checkudata(L, 1, EVENT_CALLBACK_ARG_MT);
+ freeCallbackArgs(arg);
+ return 0;
+}
+
+int getSocketFd(lua_State* L, int idx) {
+ int fd;
+ luaL_checktype(L, idx, LUA_TUSERDATA);
+ lua_getfield(L, idx, "getfd");
+ if(lua_isnil(L, -1))
+ return luaL_error(L, "Socket type missing 'getfd' method");
+ lua_pushvalue(L, idx);
+ lua_call(L, 1, 1);
+ fd = lua_tointeger(L, -1);
+ lua_pop(L, 1);
+ return fd;
+}
+
+/* Expected to be called at the beginning of the coro that uses it..
+Value must be kept until coro is complete....
+*/
+/* sock, event, callback */
+static int luaevent_addevent(lua_State* L) {
+ int fd, event, callbackRef;
+ le_callback* arg;
+ fd = getSocketFd(L, 1);
+ event = luaL_checkinteger(L, 2);
+ luaL_checktype(L, 3, LUA_TFUNCTION);
+ lua_pushvalue(L, 3);
+ callbackRef = luaL_ref(L, LUA_REGISTRYINDEX);
+ arg = lua_newuserdata(L, sizeof(*arg));
+ luaL_getmetatable(L, EVENT_CALLBACK_ARG_MT);
+ lua_setmetatable(L, -2);
+
+ arg->L = L;
+ arg->callbackRef = callbackRef;
+ /* Setup event... */
+ event_set(&arg->ev, fd, event | EV_PERSIST, luaevent_callback, arg);
+ event_base_set(getEventBase(L), &arg->ev);
+ event_add(&arg->ev, NULL);
+ return 1;
+}
+
+static int luaevent_loop(lua_State* L) {
+ int ret = event_base_loop(getEventBase(L), 0);
+ lua_pushinteger(L, ret);
+ return 1;
+}
+
+static luaL_Reg funcs[] = {
+ { "addevent", luaevent_addevent },
+ { "loop", luaevent_loop },
+ { NULL, NULL }
+};
+
+typedef struct {
+ const char* name;
+ int value;
+} namedInteger;
+
+static namedInteger consts[] = {
+ {"LEAVE", -1},
+ {"EV_READ", EV_READ},
+ {"EV_WRITE", EV_WRITE},
+ {NULL, 0}
+};
+
+void setNamedIntegers(lua_State* L, namedInteger* p) {
+ while(p->name) {
+ lua_pushinteger(L, p->value);
+ lua_setfield(L, -2, p->name);
+ p++;
+ }
+}
+
+/* Verified ok */
+int luaopen_luaevent_core(lua_State* L) {
+ /* Setup environ table */
+ lua_createtable(L, 1, 0);
+ lua_replace(L, LUA_ENVIRONINDEX);
+ /* Setup metatable */
+ luaL_newmetatable(L, EVENT_BASE_MT);
+ lua_pushcfunction(L, luaevent_base_gc);
+ lua_setfield(L, -2, "__gc");
+ lua_pop(L, 1);
+ luaL_newmetatable(L, EVENT_CALLBACK_ARG_MT);
+ lua_pushcfunction(L, luaevent_cb_gc);
+ lua_setfield(L, -2, "__gc");
+ lua_pop(L, 1);
+
+ setEventBase(L, event_init());
+
+ luaL_register(L, "luaevent.core", funcs);
+ setNamedIntegers(L, consts);
+ return 1;
+}