1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2008 InspIRCd Development Team
6 * See: http://www.inspircd.org/wiki/index.php/Credits
8 * This program is free but copyrighted software; see
9 * the file COPYING for details.
11 * ---------------------------------------------------
16 #include <sys/select.h>
18 #include "socketengines/socketengine_select.h"
21 SelectEngine::SelectEngine(InspIRCd* Instance) : SocketEngine(Instance)
25 memset(writeable, 0, sizeof(writeable));
28 SelectEngine::~SelectEngine()
32 bool SelectEngine::AddFd(EventHandler* eh)
35 if ((fd < 0) || (fd > MAX_DESCRIPTORS))
38 if (GetRemainingFds() <= 1)
48 ServerInstance->Logs->Log("SOCKET",DEBUG,"New file descriptor: %d", fd);
52 void SelectEngine::WantWrite(EventHandler* eh)
54 writeable[eh->GetFd()] = true;
57 bool SelectEngine::DelFd(EventHandler* eh, bool force)
61 if ((fd < 0) || (fd > MAX_DESCRIPTORS))
64 std::map<int,int>::iterator t = fds.find(fd);
71 ServerInstance->Logs->Log("SOCKET",DEBUG,"Remove file descriptor: %d", fd);
75 int SelectEngine::GetMaxFds()
80 int SelectEngine::GetRemainingFds()
82 return FD_SETSIZE - CurrentSetSize;
85 int SelectEngine::DispatchEvents()
90 EventHandler* ev[MAX_DESCRIPTORS];
98 for (std::map<int,int>::iterator a = fds.begin(); a != fds.end(); a++)
100 if (ref[a->second]->Readable())
101 FD_SET (a->second, &rfdset);
103 FD_SET (a->second, &wfdset);
104 if (writeable[a->second])
105 FD_SET (a->second, &wfdset);
107 FD_SET (a->second, &errfdset);
113 sresult = select(FD_SETSIZE, &rfdset, &wfdset, &errfdset, &tval);
117 for (std::map<int,int>::iterator a = fds.begin(); a != fds.end(); a++)
119 if ((FD_ISSET (a->second, &rfdset)) || (FD_ISSET (a->second, &wfdset)) || FD_ISSET (a->second, &errfdset))
121 ev[result++] = ref[a->second];
126 /** An event handler may remove its own descriptor from the list, therefore it is not
127 * safe to directly iterate over the list and dispatch events there with STL iterators.
128 * Thats a shame because it makes this code slower and more resource intensive, but maybe
129 * the user should stop using select(), as select() smells anyway.
131 for (int i = 0; i < result; i++)
135 if (FD_ISSET (ev[i]->GetFd(), &errfdset))
139 if (getsockopt(ev[i]->GetFd(), SOL_SOCKET, SO_ERROR, (char*)&errcode, &codesize) < 0)
142 ev[i]->HandleEvent(EVENT_ERROR, errcode);
148 if (writeable[ev[i]->GetFd()])
151 writeable[ev[i]->GetFd()] = false;
152 ev[i]->HandleEvent(EVENT_WRITE);
156 if (ev[i]->Readable())
159 ev[i]->HandleEvent(EVENT_READ);
164 ev[i]->HandleEvent(EVENT_WRITE);
174 std::string SelectEngine::GetName()