1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2009 InspIRCd Development Team
6 * See: http://wiki.inspircd.org/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
14 #include "inspircd_config.h"
15 #ifndef CONFIG_USE_IOCP
19 #include <sys/select.h>
22 #ifndef __SOCKETENGINE_SELECT__
23 #define __SOCKETENGINE_SELECT__
29 #include <sys/select.h>
32 #include "socketengine.h"
34 /** A specialisation of the SocketEngine class, designed to use traditional select().
36 class SelectEngine : public SocketEngine
39 /** Create a new SelectEngine
42 /** Delete a SelectEngine
44 virtual ~SelectEngine();
45 virtual bool AddFd(EventHandler* eh, int event_mask);
46 virtual bool DelFd(EventHandler* eh, bool force = false);
47 void OnSetEvent(EventHandler* eh, int, int);
48 virtual int DispatchEvents();
49 virtual std::string GetName();
56 SelectEngine::SelectEngine()
58 MAX_DESCRIPTORS = FD_SETSIZE;
61 ref = new EventHandler* [GetMaxFds()];
62 memset(ref, 0, GetMaxFds() * sizeof(EventHandler*));
65 SelectEngine::~SelectEngine()
70 bool SelectEngine::AddFd(EventHandler* eh, int event_mask)
73 if ((fd < 0) || (fd > GetMaxFds() - 1))
80 SocketEngine::SetEventMask(eh, event_mask);
83 ServerInstance->Logs->Log("SOCKET",DEBUG,"New file descriptor: %d", fd);
87 bool SelectEngine::DelFd(EventHandler* eh, bool force)
91 if ((fd < 0) || (fd > GetMaxFds() - 1))
97 ServerInstance->Logs->Log("SOCKET",DEBUG,"Remove file descriptor: %d", fd);
101 void SelectEngine::OnSetEvent(EventHandler* eh, int old_mask, int new_mask)
103 // deal with it later
106 int SelectEngine::DispatchEvents()
110 socklen_t codesize = sizeof(int);
113 fd_set wfdset, rfdset, errfdset;
118 /* Populate the select FD sets (this is why select sucks compared to epoll, kqueue, IOCP) */
119 for (unsigned int i = 0; i < FD_SETSIZE; i++)
121 EventHandler* eh = ref[i];
124 int state = eh->GetEventMask();
125 if (state & (FD_WANT_POLL_READ | FD_WANT_FAST_READ))
127 if (state & (FD_WANT_POLL_WRITE | FD_WANT_FAST_WRITE | FD_WANT_SINGLE_WRITE))
129 FD_SET (i, &errfdset);
132 /* One second wait */
136 sresult = select(FD_SETSIZE, &rfdset, &wfdset, &errfdset, &tval);
138 /* Nothing to process this time around */
142 for (int i = 0; i < FD_SETSIZE; i++)
144 EventHandler* ev = ref[i];
147 if (FD_ISSET (i, &errfdset))
150 if (getsockopt(i, SOL_SOCKET, SO_ERROR, (char*)&errcode, &codesize) < 0)
153 ev->HandleEvent(EVENT_ERROR, errcode);
158 /* NOTE: This is a pair of seperate if statements as the socket
159 * may be in both read and writeable state at the same time.
160 * If an error event occurs above it is not worth processing the
161 * read and write states even if set.
163 if (FD_ISSET (i, &rfdset))
166 SetEventMask(ev, ev->GetEventMask() & ~FD_READ_WILL_BLOCK);
167 ev->HandleEvent(EVENT_READ);
169 if (FD_ISSET (i, &wfdset))
172 SetEventMask(ev, ev->GetEventMask() & ~(FD_WRITE_WILL_BLOCK | FD_WANT_SINGLE_WRITE));
173 ev->HandleEvent(EVENT_WRITE);
182 std::string SelectEngine::GetName()
187 SocketEngine* CreateSocketEngine()
189 return new SelectEngine;