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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2008 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "exitcodes.h"
#include "socketengine_poll.h"
PollEngine::PollEngine(InspIRCd* Instance) : SocketEngine(Instance)
{
// Poll requires no special setup (which is nice).
CurrentSetSize = 0;
memset(&events, 0, MAX_DESCRIPTORS);
}
PollEngine::~PollEngine()
{
// No destruction required, either.
}
bool PollEngine::AddFd(EventHandler* eh)
{
int fd = eh->GetFd();
if ((fd < 0) || (fd > MAX_DESCRIPTORS))
return false;
if (GetRemainingFds() <= 1)
return false;
if (ref[fd])
return false;
ref[fd] = eh;
events[fd].fd = fd;
if (eh->Readable())
{
events[fd].events = POLLIN;
}
else
{
events[fd].events = POLLOUT;
}
ServerInstance->Log(DEBUG,"New file descriptor: %d (%d)", fd, events[fd].events);
CurrentSetSize++;
return true;
}
void PollEngine::WantWrite(EventHandler* eh)
{
events[eh->GetFd()].events = POLLIN | POLLOUT;
}
bool PollEngine::DelFd(EventHandler* eh, bool force)
{
int fd = eh->GetFd();
if ((fd < 0) || (fd > MAX_DESCRIPTORS))
return false;
events[fd].fd = -1;
events[fd].events = 0;
CurrentSetSize--;
ref[fd] = NULL;
ServerInstance->Log(DEBUG,"Remove file descriptor: %d", fd);
return true;
}
int PollEngine::GetMaxFds()
{
return MAX_DESCRIPTORS;
}
int PollEngine::GetRemainingFds()
{
return MAX_DESCRIPTORS - CurrentSetSize;
}
int PollEngine::DispatchEvents()
{
int i = poll(events, MAX_DESCRIPTORS, 1000);
int fd = 0;
socklen_t codesize = sizeof(int);
int errcode;
int processed = 0;
if (i > 0)
{
for (fd = 0; fd < MAX_DESCRIPTORS && processed != i; fd++)
{
if (events[fd].revents)
processed++;
if (events[fd].revents & POLLHUP)
{
if (ref[fd])
ref[fd]->HandleEvent(EVENT_ERROR, 0);
continue;
}
if (events[fd].revents & POLLERR)
{
// Get error number
if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &errcode, &codesize) < 0)
errcode = errno;
if (ref[fd])
ref[fd]->HandleEvent(EVENT_ERROR, errcode);
continue;
}
if (events[fd].revents & POLLOUT)
{
// Switch to wanting read again
// event handlers have to request to write again if they need it
events[fd].events = POLLIN;
if (ref[fd])
ref[fd]->HandleEvent(EVENT_WRITE);
}
if (events[fd].revents & POLLIN)
{
if (ref[fd])
ref[fd]->HandleEvent(EVENT_READ);
}
}
}
return i;
}
std::string PollEngine::GetName()
{
return "poll";
}
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