-/* +------------------------------------+
- * | Inspire Internet Relay Chat Daemon |
- * +------------------------------------+
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
*
- * InspIRCd: (C) 2002-2009 InspIRCd Development Team
- * See: http://www.inspircd.org/wiki/index.php/Credits
+ * Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
+ * Copyright (C) 2009 Uli Schlachter <psychon@znc.in>
+ * Copyright (C) 2009 Craig Edwards <craigedwards@brainbox.cc>
+ * Copyright (C) 2008 Robin Burchell <robin+git@viroteck.net>
*
- * This program is free but copyrighted software; see
- * the file COPYING for details.
+ * This file is part of InspIRCd. InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
*
- * ---------------------------------------------------
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+
#include "inspircd.h"
#include "exitcodes.h"
-#include "socketengines/socketengine_poll.h"
+
+#ifndef SOCKETENGINE_POLL
+#define SOCKETENGINE_POLL
+
+#include <vector>
+#include <string>
+#include <map>
+#include "inspircd_config.h"
+#include "inspircd.h"
+#include "socketengine.h"
+
+#ifndef _WIN32
+ #ifndef __USE_XOPEN
+ #define __USE_XOPEN /* fuck every fucking OS ever made. needed by poll.h to work.*/
+ #endif
+ #include <poll.h>
+ #include <sys/poll.h>
+#else
+ /* *grumble* */
+ #define struct pollfd WSAPOLLFD
+ #define poll WSAPoll
+#endif
+
+class InspIRCd;
+
+/** A specialisation of the SocketEngine class, designed to use poll().
+ */
+class PollEngine : public SocketEngine
+{
+private:
+ /** These are used by poll() to hold socket events
+ */
+ struct pollfd *events;
+ /** This map maps fds to an index in the events array.
+ */
+ std::map<int, unsigned int> fd_mappings;
+public:
+ /** Create a new PollEngine
+ */
+ PollEngine();
+ /** Delete a PollEngine
+ */
+ virtual ~PollEngine();
+ virtual bool AddFd(EventHandler* eh, int event_mask);
+ virtual void OnSetEvent(EventHandler* eh, int old_mask, int new_mask);
+ virtual EventHandler* GetRef(int fd);
+ virtual void DelFd(EventHandler* eh);
+ virtual int DispatchEvents();
+ virtual std::string GetName();
+};
+
+#endif
+
#include <ulimit.h>
+#ifdef __FreeBSD__
+ #include <sys/sysctl.h>
+#endif
-PollEngine::PollEngine(InspIRCd* Instance) : SocketEngine(Instance)
+PollEngine::PollEngine()
{
- // Poll requires no special setup (which is nice).
CurrentSetSize = 0;
- MAX_DESCRIPTORS = 0;
+#ifndef __FreeBSD__
+ int max = ulimit(4, 0);
+ if (max > 0)
+ {
+ MAX_DESCRIPTORS = max;
+ }
+ else
+ {
+ ServerInstance->Logs->Log("SOCKET", DEFAULT, "ERROR: Can't determine maximum number of open sockets: %s", strerror(errno));
+ printf("ERROR: Can't determine maximum number of open sockets: %s\n", strerror(errno));
+ ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
+ }
+#else
+ int mib[2];
+ size_t len;
+
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_MAXFILES;
+ len = sizeof(MAX_DESCRIPTORS);
+ sysctl(mib, 2, &MAX_DESCRIPTORS, &len, NULL, 0);
+#endif
ref = new EventHandler* [GetMaxFds()];
events = new struct pollfd[GetMaxFds()];
delete[] events;
}
-bool PollEngine::AddFd(EventHandler* eh)
+static int mask_to_poll(int event_mask)
+{
+ int rv = 0;
+ if (event_mask & (FD_WANT_POLL_READ | FD_WANT_FAST_READ))
+ rv |= POLLIN;
+ if (event_mask & (FD_WANT_POLL_WRITE | FD_WANT_FAST_WRITE | FD_WANT_SINGLE_WRITE))
+ rv |= POLLOUT;
+ return rv;
+}
+
+bool PollEngine::AddFd(EventHandler* eh, int event_mask)
{
int fd = eh->GetFd();
if ((fd < 0) || (fd > GetMaxFds() - 1))
return false;
}
- if (GetRemainingFds() <= 1)
- {
- ServerInstance->Logs->Log("SOCKET",DEBUG,"No remaining FDs cannot add fd: %d", fd);
- return false;
- }
-
- if (ref[fd])
+ if (fd_mappings.find(fd) != fd_mappings.end())
{
ServerInstance->Logs->Log("SOCKET",DEBUG,"Attempt to add duplicate fd: %d", fd);
return false;
}
- ref[fd] = eh;
- events[fd].fd = fd;
- if (eh->Readable())
- {
- events[fd].events = POLLIN;
- }
- else
- {
- events[fd].events = POLLOUT;
- }
+ unsigned int index = CurrentSetSize;
- ServerInstance->Logs->Log("SOCKET", DEBUG,"New file descriptor: %d (%d)", fd, events[fd].events);
+ fd_mappings[fd] = index;
+ ref[index] = eh;
+ events[index].fd = fd;
+ events[index].events = mask_to_poll(event_mask);
+
+ ServerInstance->Logs->Log("SOCKET", DEBUG,"New file descriptor: %d (%d; index %d)", fd, events[fd].events, index);
+ SocketEngine::SetEventMask(eh, event_mask);
CurrentSetSize++;
return true;
}
-void PollEngine::WantWrite(EventHandler* eh)
+EventHandler* PollEngine::GetRef(int fd)
{
- events[eh->GetFd()].events = POLLIN | POLLOUT;
+ std::map<int, unsigned int>::iterator it = fd_mappings.find(fd);
+ if (it == fd_mappings.end())
+ return NULL;
+ return ref[it->second];
}
-bool PollEngine::DelFd(EventHandler* eh, bool force)
+void PollEngine::OnSetEvent(EventHandler* eh, int old_mask, int new_mask)
{
- int fd = eh->GetFd();
- if ((fd < 0) || (fd > MAX_DESCRIPTORS))
+ std::map<int, unsigned int>::iterator it = fd_mappings.find(eh->GetFd());
+ if (it == fd_mappings.end())
{
- ServerInstance->Logs->Log("SOCKET", DEBUG, "DelFd out of range: (fd: %d, max: %d)", fd, GetMaxFds());
- return false;
+ ServerInstance->Logs->Log("SOCKET",DEBUG,"SetEvents() on unknown fd: %d", eh->GetFd());
+ return;
}
- events[fd].fd = -1;
- events[fd].events = 0;
-
- CurrentSetSize--;
- ref[fd] = NULL;
-
- ServerInstance->Logs->Log("SOCKET", DEBUG, "Remove file descriptor: %d", fd);
- return true;
+ events[it->second].events = mask_to_poll(new_mask);
}
-int PollEngine::GetMaxFds()
+void PollEngine::DelFd(EventHandler* eh)
{
-#ifdef LINUX
- if (MAX_DESCRIPTORS)
- return MAX_DESCRIPTORS;
-
- int max = ulimit(4, 0);
- if (max > 0)
+ int fd = eh->GetFd();
+ if ((fd < 0) || (fd > MAX_DESCRIPTORS))
{
- MAX_DESCRIPTORS = max;
- return max;
+ ServerInstance->Logs->Log("SOCKET", DEBUG, "DelFd out of range: (fd: %d, max: %d)", fd, GetMaxFds());
+ return;
}
- else
+
+ std::map<int, unsigned int>::iterator it = fd_mappings.find(fd);
+ if (it == fd_mappings.end())
{
- MAX_DESCRIPTORS = 0;
- ServerInstance->Logs->Log("SOCKET", DEFAULT, "ERROR: Can't determine maximum number of open sockets: %s", strerror(errno));
- printf("ERROR: Can't determine maximum number of open sockets: %s\n", strerror(errno)));
- ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
+ ServerInstance->Logs->Log("SOCKET",DEBUG,"DelFd() on unknown fd: %d", fd);
+ return;
}
- return 0;
-#endif
-#ifdef FREEBSD
- if (!MAX_DESCRIPTORS)
+
+ unsigned int index = it->second;
+ unsigned int last_index = CurrentSetSize - 1;
+ int last_fd = events[last_index].fd;
+
+ if (index != last_index)
{
- int mib[2], maxfiles;
- size_t len;
-
- mib[0] = CTL_KERN;
- mib[1] = KERN_MAXFILES;
- len = sizeof(maxfiles);
- sysctl(mib, 2, &maxfiles, &len, NULL, 0);
- MAX_DESCRIPTORS = maxfiles;
- return maxfiles;
+ // We need to move the last fd we got into this gap (gaps are evil!)
+
+ // So update the mapping for the last fd to its new position
+ fd_mappings[last_fd] = index;
+
+ // move last_fd from last_index into index
+ events[index].fd = last_fd;
+ events[index].events = events[last_index].events;
+
+ ref[index] = ref[last_index];
}
- return MAX_DESCRIPTORS;
-#endif
-}
-int PollEngine::GetRemainingFds()
-{
- return MAX_DESCRIPTORS - CurrentSetSize;
+ // Now remove all data for the last fd we got into out list.
+ // Above code made sure this always is right
+ fd_mappings.erase(it);
+ events[last_index].fd = 0;
+ events[last_index].events = 0;
+ ref[last_index] = NULL;
+
+ CurrentSetSize--;
+
+ ServerInstance->Logs->Log("SOCKET", DEBUG, "Remove file descriptor: %d (index: %d) "
+ "(Filled gap with: %d (index: %d))", fd, index, last_fd, last_index);
}
int PollEngine::DispatchEvents()
{
- int i = poll(events, GetMaxFds() - 1, 1000);
- int fd = 0;
+ int i = poll(events, CurrentSetSize, 1000);
+ int index;
socklen_t codesize = sizeof(int);
int errcode;
int processed = 0;
+ ServerInstance->UpdateTime();
if (i > 0)
{
- for (fd = 0; fd < GetMaxFds() - 1 && processed != i; fd++)
+ for (index = 0; index < CurrentSetSize && processed != i; index++)
{
- if (events[fd].revents)
+ if (events[index].revents)
processed++;
+ EventHandler* eh = ref[index];
+ if (!eh)
+ continue;
- if (events[fd].revents & POLLHUP)
+ if (events[index].revents & POLLHUP)
{
- if (ref[fd])
- ref[fd]->HandleEvent(EVENT_ERROR, 0);
+ eh->HandleEvent(EVENT_ERROR, 0);
continue;
}
- if (events[fd].revents & POLLERR)
+ if (events[index].revents & POLLERR)
{
+ // Get fd
+ int fd = events[index].fd;
+
// Get error number
if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &errcode, &codesize) < 0)
errcode = errno;
- if (ref[fd])
- ref[fd]->HandleEvent(EVENT_ERROR, errcode);
+ eh->HandleEvent(EVENT_ERROR, errcode);
continue;
}
- if (events[fd].revents & POLLOUT)
+ if (events[index].revents & POLLIN)
{
- // 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);
+ SetEventMask(eh, eh->GetEventMask() & ~FD_READ_WILL_BLOCK);
+ eh->HandleEvent(EVENT_READ);
+ if (eh != ref[index])
+ // whoops, deleted out from under us
+ continue;
}
-
- if (events[fd].revents & POLLIN)
+
+ if (events[index].revents & POLLOUT)
{
- if (ref[fd])
- ref[fd]->HandleEvent(EVENT_READ);
+ int mask = eh->GetEventMask();
+ mask &= ~(FD_WRITE_WILL_BLOCK | FD_WANT_SINGLE_WRITE);
+ SetEventMask(eh, mask);
+ events[index].events = mask_to_poll(mask);
+ eh->HandleEvent(EVENT_WRITE);
}
}
}
return "poll";
}
+SocketEngine* CreateSocketEngine()
+{
+ return new PollEngine;
+}
projects / user / henk / code / inspircd.git / blobdiff