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#include "module.h"
#include <sys/epoll.h>
#include <ulimit.h>
static long max;
static int EngineHandle;
static epoll_event *events;
void SocketEngine::Init()
{
max = ulimit(4, 0);
if (max <= 0)
throw SocketException("Can't determine maximum number of open sockets");
EngineHandle = epoll_create(max / 4);
if (EngineHandle == -1)
throw SocketException("Could not initialize epoll socket engine: " + Anope::LastError());
events = new epoll_event[max];
memset(events, 0, sizeof(epoll_event) * max);
}
void SocketEngine::Shutdown()
{
Process();
for (std::map<int, Socket *>::const_iterator it = Sockets.begin(), it_end = Sockets.end(); it != it_end;)
{
Socket *s = it->second;
++it;
delete s;
}
Sockets.clear();
delete [] events;
}
void SocketEngine::AddSocket(Socket *s)
{
epoll_event ev;
memset(&ev, 0, sizeof(ev));
ev.events = EPOLLIN;
ev.data.fd = s->GetFD();
if (epoll_ctl(EngineHandle, EPOLL_CTL_ADD, ev.data.fd, &ev) == -1)
throw SocketException("Unable to add fd " + stringify(ev.data.fd) + " to epoll: " + Anope::LastError());
Sockets.insert(std::make_pair(ev.data.fd, s));
}
void SocketEngine::DelSocket(Socket *s)
{
epoll_event ev;
memset(&ev, 0, sizeof(ev));
ev.data.fd = s->GetFD();
if (epoll_ctl(EngineHandle, EPOLL_CTL_DEL, ev.data.fd, &ev) == -1)
throw SocketException("Unable to remove fd " + stringify(ev.data.fd) + " from epoll: " + Anope::LastError());
Sockets.erase(ev.data.fd);
}
void SocketEngine::MarkWritable(Socket *s)
{
if (s->HasFlag(SF_WRITABLE))
return;
epoll_event ev;
memset(&ev, 0, sizeof(ev));
ev.events = EPOLLIN | EPOLLOUT;
ev.data.fd = s->GetFD();
if (epoll_ctl(EngineHandle, EPOLL_CTL_MOD, ev.data.fd, &ev) == -1)
throw SocketException("Unable to mark fd " + stringify(ev.data.fd) + " as writable in epoll: " + Anope::LastError());
s->SetFlag(SF_WRITABLE);
}
void SocketEngine::ClearWritable(Socket *s)
{
if (!s->HasFlag(SF_WRITABLE))
return;
epoll_event ev;
memset(&ev, 0, sizeof(ev));
ev.events = EPOLLIN;
ev.data.fd = s->GetFD();
if (epoll_ctl(EngineHandle, EPOLL_CTL_MOD, ev.data.fd, &ev) == -1)
throw SocketException("Unable clear mark fd " + stringify(ev.data.fd) + " as writable in epoll: " + Anope::LastError());
s->UnsetFlag(SF_WRITABLE);
}
void SocketEngine::Process()
{
int total = epoll_wait(EngineHandle, events, max - 1, Config->ReadTimeout * 1000);
Anope::CurTime = time(NULL);
/* EINTR can be given if the read timeout expires */
if (total == -1)
{
if (errno != EINTR)
Log() << "SockEngine::Process(): error: " << Anope::LastError();
return;
}
for (int i = 0; i < total; ++i)
{
epoll_event *ev = &events[i];
std::map<int, Socket *>::iterator it = Sockets.find(ev->data.fd);
if (it == Sockets.end())
continue;
Socket *s = it->second;
if (ev->events & (EPOLLHUP | EPOLLERR))
{
socklen_t sz = sizeof(errno);
getsockopt(s->GetFD(), SOL_SOCKET, SO_ERROR, &errno, &sz);
s->ProcessError();
s->SetFlag(SF_DEAD);
delete s;
continue;
}
if (!s->Process())
continue;
if ((ev->events & EPOLLIN) && !s->ProcessRead())
s->SetFlag(SF_DEAD);
if ((ev->events & EPOLLOUT) && !s->ProcessWrite())
s->SetFlag(SF_DEAD);
if (s->HasFlag(SF_DEAD))
delete s;
}
}
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