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/* LuaEvent - Copyright (C) 2007 Thomas Harning <harningt@gmail.com>
* Licensed as LGPL - See doc/COPYING for details */
#include "event_callback.h"
#include "event_buffer.h"
#include "buffer_event.h"
#include <lauxlib.h>
#include <assert.h>
#include <string.h>
#define EVENT_BASE_MT "EVENT_BASE_MT"
le_base* event_base_get(lua_State* L, int idx) {
return (le_base*)luaL_checkudata(L, idx, EVENT_BASE_MT);
}
int luaevent_newbase(lua_State* L) {
le_base *base = (le_base*)lua_newuserdata(L, sizeof(le_base));
base->loop_L = NULL; /* No running loop */
base->base = event_init();
luaL_getmetatable(L, EVENT_BASE_MT);
lua_setmetatable(L, -2);
return 1;
}
int luaevent_libevent_version(lua_State* L) {
lua_pushstring(L, event_get_version());
return 1;
}
static int luaevent_base_gc(lua_State* L) {
le_base *base = event_base_get(L, 1);
if(base->base) {
event_base_free(base->base);
base->base = NULL;
}
return 0;
}
int getSocketFd(lua_State* L, int idx) {
int fd;
if(lua_isnumber(L, idx)) {
fd = lua_tonumber(L, idx);
} else {
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;
}
void load_timeval(double time, struct timeval *tv) {
tv->tv_sec = (int) time;
tv->tv_usec = (int)( (time - tv->tv_sec) * 1000000 );
}
/* sock, event, callback, timeout */
static int luaevent_addevent(lua_State* L) {
int fd, event;
le_callback* arg = event_callback_push(L, 1, 4);
struct timeval *tv = &arg->timeout;
if(lua_isnil(L, 2) && lua_isnumber(L, 5)) {
fd = -1; /* Per event_timer_set.... */
} else {
fd = getSocketFd(L, 2);
}
event = luaL_checkinteger(L, 3);
if(lua_isnumber(L, 5)) {
double time = lua_tonumber(L, 5);
load_timeval(time, tv);
} else {
tv = NULL;
}
/* Setup event... */
event_set(&arg->ev, fd, event | EV_PERSIST, luaevent_callback, arg);
event_base_set(arg->base->base, &arg->ev);
event_add(&arg->ev, tv);
return 1;
}
static int luaevent_loop(lua_State* L) {
int ret;
le_base *base = event_base_get(L, 1);
base->loop_L = L;
ret = event_base_loop(base->base, 0);
lua_pushinteger(L, ret);
return 1;
}
static int luaevent_loopexit(lua_State*L) {
int ret;
le_base *base = event_base_get(L, 1);
struct timeval tv = { 0, 0 };
if(lua_gettop(L) >= 2) /* Optional timeout before exiting the loop */
load_timeval(luaL_checknumber(L, 2), &tv);
ret = event_base_loopexit(base->base, &tv);
lua_pushinteger(L, ret);
return 1;
}
static int luaevent_method(lua_State* L) {
#ifdef _EVENT_VERSION
le_base *base = event_base_get(L, 1);
if(strcmp(_EVENT_VERSION, "1.3")<0)
lua_pushstring(L, event_base_get_method(base->base));
else
#endif
lua_pushstring(L, event_get_method());
return 1;
}
static luaL_Reg base_funcs[] = {
{ "addevent", luaevent_addevent },
{ "loop", luaevent_loop },
{ "loopexit", luaevent_loopexit },
{ "method", luaevent_method },
{ NULL, NULL }
};
static luaL_Reg funcs[] = {
{ "new", luaevent_newbase },
{ "libevent_version", luaevent_libevent_version },
{ NULL, NULL }
};
typedef struct {
const char* name;
int value;
} namedInteger;
static namedInteger consts[] = {
{"LEAVE", -1},
{"EV_READ", EV_READ},
{"EV_WRITE", EV_WRITE},
{"EV_TIMEOUT", EV_TIMEOUT},
{"EV_SIGNAL", EV_SIGNAL},
{"EV_PERSIST", EV_PERSIST},
/* bufferevent */
{"EVBUFFER_READ", EVBUFFER_READ},
{"EVBUFFER_WRITE", EVBUFFER_WRITE},
{"EVBUFFER_EOF", EVBUFFER_EOF},
{"EVBUFFER_ERROR", EVBUFFER_ERROR},
{"EVBUFFER_TIMEOUT", EVBUFFER_TIMEOUT},
{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) {
#ifdef _WIN32
WORD wVersionRequested = MAKEWORD(2, 2);
WSADATA wsaData;
WSAStartup(wVersionRequested, &wsaData);
#endif
event_init( );
/* Register external items */
event_callback_register(L);
event_buffer_register(L);
buffer_event_register(L);
lua_settop(L, 0);
/* Setup metatable */
luaL_newmetatable(L, EVENT_BASE_MT);
lua_newtable(L);
luaL_register(L, NULL, base_funcs);
lua_setfield(L, -2, "__index");
lua_pushcfunction(L, luaevent_base_gc);
lua_setfield(L, -2, "__gc");
lua_pop(L, 1);
luaL_register(L, "luaevent.core", funcs);
setNamedIntegers(L, consts);
return 1;
}
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