1 /* +------------------------------------+
2 * | Inspire Internet Relay Chat Daemon |
3 * +------------------------------------+
5 * InspIRCd: (C) 2002-2009 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 * ---------------------------------------------------
15 #include "exitcodes.h"
16 #include <sys/types.h>
17 #include <sys/event.h>
19 #include "socketengines/socketengine_kqueue.h"
20 #include <sys/sysctl.h>
22 KQueueEngine::KQueueEngine(InspIRCd* Instance) : SocketEngine(Instance)
25 this->RecoverFromFork();
26 ke_list = new struct kevent[GetMaxFds()];
27 ref = new EventHandler* [GetMaxFds()];
28 memset(ref, 0, GetMaxFds() * sizeof(EventHandler*));
31 void KQueueEngine::RecoverFromFork()
34 * The only bad thing about kqueue is that its fd cant survive a fork and is not inherited.
38 EngineHandle = kqueue();
39 if (EngineHandle == -1)
41 ServerInstance->Logs->Log("SOCKET",DEFAULT, "ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features.");
42 ServerInstance->Logs->Log("SOCKET",DEFAULT, "ERROR: this is a fatal error, exiting now.");
43 printf("ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features.\n");
44 printf("ERROR: this is a fatal error, exiting now.\n");
45 ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
50 KQueueEngine::~KQueueEngine()
52 this->Close(EngineHandle);
57 bool KQueueEngine::AddFd(EventHandler* eh)
61 if ((fd < 0) || (fd > GetMaxFds() - 1))
64 if (GetRemainingFds() <= 1)
70 // We always want to read from the socket...
72 EV_SET(&ke, fd, EVFILT_READ, EV_ADD, 0, 0, NULL);
74 int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
77 ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to add fd: %d %s",
82 if (!eh->Readable()) {
83 // ...and sometimes want to write
90 ServerInstance->Logs->Log("SOCKET",DEBUG,"New file descriptor: %d", fd);
94 bool KQueueEngine::DelFd(EventHandler* eh, bool force)
98 if ((fd < 0) || (fd > GetMaxFds() - 1))
100 ServerInstance->Logs->Log("SOCKET",DEFAULT,"DelFd() on invalid fd: %d", fd);
106 // First remove the write filter ignoring errors, since we can't be
107 // sure if there are actually any write filters registered.
108 EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
109 kevent(EngineHandle, &ke, 1, 0, 0, NULL);
111 // Then remove the read filter.
112 EV_SET(&ke, eh->GetFd(), EVFILT_READ, EV_DELETE, 0, 0, NULL);
113 int j = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
115 if ((j < 0) && !force)
117 ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to remove fd: %d %s",
118 fd, strerror(errno));
125 ServerInstance->Logs->Log("SOCKET",DEBUG,"Remove file descriptor: %d", fd);
129 void KQueueEngine::WantWrite(EventHandler* eh)
132 // EV_ONESHOT since we only ever want one write event
133 EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_ADD | EV_ONESHOT, 0, 0, NULL);
134 int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
136 ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to mark for writing: %d %s",
137 eh->GetFd(), strerror(errno));
141 int KQueueEngine::GetMaxFds()
143 if (!MAX_DESCRIPTORS)
145 int mib[2], maxfiles;
149 mib[1] = KERN_MAXFILES;
150 len = sizeof(maxfiles);
151 sysctl(mib, 2, &maxfiles, &len, NULL, 0);
152 MAX_DESCRIPTORS = maxfiles;
155 return MAX_DESCRIPTORS;
158 int KQueueEngine::GetRemainingFds()
160 return GetMaxFds() - CurrentSetSize;
163 int KQueueEngine::DispatchEvents()
168 int i = kevent(EngineHandle, NULL, 0, &ke_list[0], GetMaxFds(), &ts);
172 for (int j = 0; j < i; j++)
174 if (ke_list[j].flags & EV_EOF)
176 /* We love you kqueue, oh yes we do *sings*!
177 * kqueue gives us the error number directly in the EOF state!
178 * Unlike smelly epoll and select, where we have to getsockopt
179 * to get the error, this saves us time and cpu cycles. Go BSD!
182 if (ref[ke_list[j].ident])
183 ref[ke_list[j].ident]->HandleEvent(EVENT_ERROR, ke_list[j].fflags);
186 if (ke_list[j].filter == EVFILT_WRITE)
188 /* We only ever add write events with EV_ONESHOT, which
189 * means they are automatically removed once such a
190 * event fires, so nothing to do here.
194 if (ref[ke_list[j].ident])
195 ref[ke_list[j].ident]->HandleEvent(EVENT_WRITE);
197 if (ke_list[j].filter == EVFILT_READ)
200 if (ref[ke_list[j].ident])
201 ref[ke_list[j].ident]->HandleEvent(EVENT_READ);
208 std::string KQueueEngine::GetName()