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emwin.cpp
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emwin.cpp
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/*****************************************************************************
$Id$
File: emwin.cpp
Date: 05May06
Copyright (C) 2006-07 by Francis Cianfrocca. All Rights Reserved.
Gmail: blackhedd
This program is free software; you can redistribute it and/or modify
it under the terms of either: 1) the GNU General Public License
as published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version; or 2) Ruby's License.
See the file COPYING for complete licensing information.
*****************************************************************************/
// THIS ENTIRE FILE IS FOR WINDOWS BUILDS ONLY
// INCOMPLETE AND DISABLED FOR NOW.
#ifdef xOS_WIN32
#include "project.h"
// Keep a global variable floating around
// with the current loop time as set by the Event Machine.
// This avoids the need for frequent expensive calls to time(NULL);
time_t gCurrentLoopTime;
/******************************
EventMachine_t::EventMachine_t
******************************/
EventMachine_t::EventMachine_t (void (*event_callback)(const char*, int, const char*, int)):
EventCallback (event_callback),
NextHeartbeatTime (0)
{
gTerminateSignalReceived = false;
Iocp = NULL;
}
/*******************************
EventMachine_t::~EventMachine_t
*******************************/
EventMachine_t::~EventMachine_t()
{
cerr << "EM __dt\n";
if (Iocp)
CloseHandle (Iocp);
}
/****************************
EventMachine_t::ScheduleHalt
****************************/
void EventMachine_t::ScheduleHalt()
{
/* This is how we stop the machine.
* This can be called by clients. Signal handlers will probably
* set the global flag.
* For now this means there can only be one EventMachine ever running at a time.
*/
gTerminateSignalReceived = true;
}
/*******************
EventMachine_t::Run
*******************/
void EventMachine_t::Run()
{
HookControlC (true);
Iocp = CreateIoCompletionPort (INVALID_HANDLE_VALUE, NULL, 0, 0);
if (Iocp == NULL)
throw std::runtime_error ("no completion port");
DWORD nBytes, nCompletionKey;
LPOVERLAPPED Overlapped;
do {
gCurrentLoopTime = time(NULL);
// Have some kind of strategy that will dequeue maybe up to 10 completions
// without running the timers as long as they are available immediately.
// Otherwise in a busy server we're calling them every time through the loop.
if (!_RunTimers())
break;
if (GetQueuedCompletionStatus (Iocp, &nBytes, &nCompletionKey, &Overlapped, 1000)) {
}
cerr << "+";
} while (!gTerminateSignalReceived);
/*
while (true) {
gCurrentLoopTime = time(NULL);
if (!_RunTimers())
break;
_AddNewDescriptors();
if (!_RunOnce())
break;
if (gTerminateSignalReceived)
break;
}
*/
HookControlC (false);
}
/**************************
EventMachine_t::_RunTimers
**************************/
bool EventMachine_t::_RunTimers()
{
// These are caller-defined timer handlers.
// Return T/F to indicate whether we should continue the main loop.
// We rely on the fact that multimaps sort by their keys to avoid
// inspecting the whole list every time we come here.
// Just keep inspecting and processing the list head until we hit
// one that hasn't expired yet.
while (true) {
multimap<time_t,Timer_t>::iterator i = Timers.begin();
if (i == Timers.end())
break;
if (i->first > gCurrentLoopTime)
break;
if (EventCallback)
(*EventCallback) (NULL, EM_TIMER_FIRED, NULL, i->second.GetBinding());
Timers.erase (i);
}
return true;
}
/***********************************
EventMachine_t::InstallOneshotTimer
***********************************/
const char *EventMachine_t::InstallOneshotTimer (int seconds)
{
if (Timers.size() > MaxOutstandingTimers)
return false;
// Don't use the global loop-time variable here, because we might
// get called before the main event machine is running.
Timer_t t;
Timers.insert (make_pair (time(NULL) + seconds, t));
return t.GetBinding();
}
/**********************************
EventMachine_t::OpenDatagramSocket
**********************************/
const char *EventMachine_t::OpenDatagramSocket (const char *address, int port)
{
cerr << "OPEN DATAGRAM SOCKET\n";
return "Unimplemented";
}
/*******************************
EventMachine_t::CreateTcpServer
*******************************/
const char *EventMachine_t::CreateTcpServer (const char *server, int port)
{
/* Create a TCP-acceptor (server) socket and add it to the event machine.
* Return the binding of the new acceptor to the caller.
* This binding will be referenced when the new acceptor sends events
* to indicate accepted connections.
*/
const char *output_binding = NULL;
struct sockaddr_in sin;
SOCKET sd_accept = socket (AF_INET, SOCK_STREAM, 0);
if (sd_accept == INVALID_SOCKET) {
goto fail;
}
memset (&sin, 0, sizeof(sin));
sin.sin_family = AF_INET;
sin.sin_addr.s_addr = INADDR_ANY;
sin.sin_port = htons (port);
if (server && *server) {
sin.sin_addr.s_addr = inet_addr (server);
if (sin.sin_addr.s_addr == INADDR_NONE) {
hostent *hp = gethostbyname (server);
if (hp == NULL) {
//__warning ("hostname not resolved: ", server);
goto fail;
}
sin.sin_addr.s_addr = ((in_addr*)(hp->h_addr))->s_addr;
}
}
// No need to set reuseaddr on Windows.
if (bind (sd_accept, (struct sockaddr*)&sin, sizeof(sin))) {
//__warning ("binding failed");
goto fail;
}
if (listen (sd_accept, 100)) {
//__warning ("listen failed");
goto fail;
}
{ // Looking good.
AcceptorDescriptor *ad = new AcceptorDescriptor (this, sd_accept);
if (!ad)
throw std::runtime_error ("unable to allocate acceptor");
Add (ad);
output_binding = ad->GetBinding();
CreateIoCompletionPort ((HANDLE)sd_accept, Iocp, NULL, 0);
SOCKET sd = socket (AF_INET, SOCK_STREAM, 0);
CreateIoCompletionPort ((HANDLE)sd, Iocp, NULL, 0);
AcceptEx (sd_accept, sd,
}
return output_binding;
fail:
if (sd_accept != INVALID_SOCKET)
closesocket (sd_accept);
return NULL;
}
/*******************************
EventMachine_t::ConnectToServer
*******************************/
const char *EventMachine_t::ConnectToServer (const char *server, int port)
{
if (!server || !*server || !port)
return NULL;
sockaddr_in pin;
unsigned long HostAddr;
HostAddr = inet_addr (server);
if (HostAddr == INADDR_NONE) {
hostent *hp = gethostbyname (server);
if (!hp)
return NULL;
HostAddr = ((in_addr*)(hp->h_addr))->s_addr;
}
memset (&pin, 0, sizeof(pin));
pin.sin_family = AF_INET;
pin.sin_addr.s_addr = HostAddr;
pin.sin_port = htons (port);
int sd = socket (AF_INET, SOCK_STREAM, 0);
if (sd == INVALID_SOCKET)
return NULL;
LPOVERLAPPED olap = (LPOVERLAPPED) calloc (1, sizeof (OVERLAPPED));
cerr << "I'm dying now\n";
throw runtime_error ("UNIMPLEMENTED!!!\n");
}
/*******************
EventMachine_t::Add
*******************/
void EventMachine_t::Add (EventableDescriptor *ed)
{
cerr << "ADD\n";
}
#endif // OS_WIN32