Use libevent2 instead of epoll

Makefile

@@ -13,7 +13,7 @@ SOURCE = src/c
 
 CORELUA = src/lua/core
 RESOURCES = resources
-LIBS=-lm -lssl -lcrypto
+LIBS=-lm -lssl -lcrypto -levent_core
 
 INCLUDES=-I$(SOURCE) -Isrc/c/lib/lua -Iinclude -Idependencies/include -Idependencies/include-$(PREFIX)
 

include/lupi.h

@@ -25,14 +25,7 @@ void luanative_start(lua_State *L);
 void setup_modules(lua_State *L);
 void termutils_start(lua_State *L);
 void internet_start(lua_State *L);
-void epoll_prepare();
-int epoll_pull(int timeout);
-
-struct lupi_event_handler {
-  int (*handler)(int, void*); /* FD, data, return number of pushed events */
-  /* TODO: doc? */
-  int fd;
-  void* data;
-};
+void event_prepare();
+int event_pull(int timeout);
 
 #endif

src/c/epoll.c

@@ -1,72 +0,0 @@
-#include "lupi.h"
-#include <lua.h>
-#include <lualib.h>
-#include <lauxlib.h>
-#include <sys/epoll.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include <event2/event.h>
-
-static int epollfd;
-
-static int handleStdin(int fd, void* data) {
-  char buf;
-  int r = read(fd, &buf, 1); /* TODO: Wide chars? */
-  if(r > 0) {
-    /* if(buf == 10) buf = 13; */
-    lua_State* L = getL();
-
-    lua_getglobal(L, "pushEvent");
-    lua_pushstring(L, "key_down");
-    lua_pushstring(L, "TODO:SetThisUuid");/* Also in textgpu.lua */
-    lua_pushnumber(L, buf);
-    lua_pushnumber(L, -1);
-    lua_pushstring(L, "user");
-    lua_call(L, 5, 0);
-
-    lua_getglobal(L, "pushEvent");
-    lua_pushstring(L, "key_up");
-    lua_pushstring(L, "TODO:SetThisUuid");
-    lua_pushnumber(L, buf);
-    lua_pushnumber(L, -1);
-    lua_pushstring(L, "user");
-    lua_call(L, 5, 0);
-
-    return 2;
-  }
-  return 0;
-}
-
-void epoll_prepare() {
-  if ((epollfd = epoll_create1(0)) < 0) {
-    perror("epoll_create");
-    exit(EXIT_FAILURE);
-  }
-
-  struct lupi_event_handler* stdin_handler = malloc(sizeof(struct lupi_event_handler)); 
-  stdin_handler->data = NULL;
-  stdin_handler->handler = handleStdin;
-  stdin_handler->fd = STDIN_FILENO;
-
-  struct epoll_event stdinEvent;
-  stdinEvent.events = EPOLLIN | EPOLLPRI;
-  stdinEvent.data.ptr = stdin_handler;
-
-  if ((epoll_ctl(epollfd, EPOLL_CTL_ADD, STDIN_FILENO, &stdinEvent) < 0)) {
-    perror("epoll_ctl");
-    exit(EXIT_FAILURE);
-  }
-}
-
-int epoll_pull(int timeout) {
-  struct epoll_event evBuffer;
-  int pushed = 0;
-
-  int eres = epoll_wait(epollfd, &evBuffer, 1, timeout);
-  if(eres > 0) {
-    struct lupi_event_handler* handler = (struct lupi_event_handler*)evBuffer.data.ptr;
-    pushed = handler->handler(handler->fd, handler->data);
-  }
-  return pushed;
-}

src/c/event.c

@@ -0,0 +1,69 @@
+#include "lupi.h"
+#include <lua.h>
+#include <lualib.h>
+#include <lauxlib.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <event2/event.h>
+#include <event2/event_struct.h>
+
+struct event_base *base;
+struct event stdinEvent;
+
+int nevt = 0;
+
+static void handleStdin(evutil_socket_t fd, short what, void *ptr) {
+  char buf;
+  int r = read(fd, &buf, 1); /* TODO: Wide chars? */
+  if(r > 0) {
+    lua_State* L = getL();
+
+    lua_getglobal(L, "pushEvent");
+    lua_pushstring(L, "key_down");
+    lua_pushstring(L, "TODO:SetThisUuid");/* Also in textgpu.lua */
+    lua_pushnumber(L, buf);
+    lua_pushnumber(L, -1);
+    lua_pushstring(L, "root");
+    lua_call(L, 5, 0);
+
+    lua_getglobal(L, "pushEvent");
+    lua_pushstring(L, "key_up");
+    lua_pushstring(L, "TODO:SetThisUuid");
+    lua_pushnumber(L, buf);
+    lua_pushnumber(L, -1);
+    lua_pushstring(L, "root");
+    lua_call(L, 5, 0);
+
+    nevt += 2;
+  }
+}
+
+void event_prepare() {
+  base = event_base_new();
+  event_assign(&stdinEvent, base, STDIN_FILENO, EV_READ, handleStdin, NULL);
+}
+
+static void add_events(struct timeval* timeout) {
+  event_add(&stdinEvent, timeout);
+}
+
+int event_pull(int _timeout) {
+  if(_timeout > 0) { /* wait max this much time for event */
+    struct timeval timeout = {_timeout / 1000, (_timeout % 1000) * 1000000};
+    add_events(&timeout);
+    /* event_base_loopexit(base, &timeout); */
+    event_base_loop(base, EVLOOP_ONCE);
+  } else if(_timeout == 0) { /* Get event without blocking */
+    add_events(NULL);
+    event_base_loop(base, EVLOOP_ONCE | EVLOOP_NONBLOCK);
+  } else { /* wait for event to appear */
+    add_events(NULL);
+    event_base_loopexit(base, NULL);
+    event_base_loop(base, EVLOOP_ONCE);
+  }
+
+  int n = nevt;
+  nevt = 0;
+  return n;
+}

src/c/lnative.c

@@ -359,7 +359,7 @@ static int l_freeMemory (lua_State *L) {
 }
 
 static int l_pull (lua_State *L) {
-  lua_pushnumber(L, epoll_pull(lua_tonumber(L, 1)));
+  lua_pushnumber(L, event_pull(lua_tonumber(L, 1)));
   return 1;
 }
 

src/c/run.c

@@ -29,7 +29,7 @@ void run_init() {
   luanative_start (L);
   internet_start  (L);
   termutils_start (L);
-  epoll_prepare();
+  event_prepare();
 
   /* int status = luaL_loadstring(L, lua_init); */
   int status = luaL_loadbuffer(L, lua_init, strlen(lua_init), "=INIT");

src/lua/core/computer.lua

@@ -135,7 +135,7 @@ function api.pullSignal(timeout)
   local nevts = 0
   repeat
     nevts = native.pull(timeout)
-  until nevts > 0 or native.uptime() > timeoutuptime
+  until nevts > 0 or native.uptime() >= timeoutuptime
   if signalQueue[1] then
     native.log("pullSignal native: " .. signalQueue[1][1])
     return table.unpack(table.remove(signalQueue, 1))