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->Log(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);
72 ServerInstance->Log(DEBUG,"Remove file descriptor: %d", fd);
76 int SelectEngine::GetMaxFds()
81 int SelectEngine::GetRemainingFds()
83 return FD_SETSIZE - CurrentSetSize;
86 int SelectEngine::DispatchEvents()
91 EventHandler* ev[MAX_DESCRIPTORS];
99 for (std::map<int,int>::iterator a = fds.begin(); a != fds.end(); a++)
101 if (ref[a->second]->Readable())
102 FD_SET (a->second, &rfdset);
104 FD_SET (a->second, &wfdset);
105 if (writeable[a->second])
106 FD_SET (a->second, &wfdset);
108 FD_SET (a->second, &errfdset);
112 sresult = select(FD_SETSIZE, &rfdset, &wfdset, &errfdset, &tval);
115 for (std::map<int,int>::iterator a = fds.begin(); a != fds.end(); a++)
117 if ((FD_ISSET (a->second, &rfdset)) || (FD_ISSET (a->second, &wfdset)) || FD_ISSET (a->second, &errfdset))
119 ev[result++] = ref[a->second];
124 /** An event handler may remove its own descriptor from the list, therefore it is not
125 * safe to directly iterate over the list and dispatch events there with STL iterators.
126 * Thats a shame because it makes this code slower and more resource intensive, but maybe
127 * the user should stop using select(), as select() smells anyway.
129 for (int i = 0; i < result; i++)
133 if (FD_ISSET (ev[i]->GetFd(), &errfdset))
137 if (getsockopt(ev[i]->GetFd(), SOL_SOCKET, SO_ERROR, (char*)&errcode, &codesize) < 0)
140 ev[i]->HandleEvent(EVENT_ERROR, errcode);
146 if (writeable[ev[i]->GetFd()])
148 writeable[ev[i]->GetFd()] = false;
150 ev[i]->HandleEvent(EVENT_WRITE);
155 ev[i]->HandleEvent(ev[i]->Readable() ? EVENT_READ : EVENT_WRITE);
164 std::string SelectEngine::GetName()