diff options
Diffstat (limited to 'src/socketengines/socketengine_kqueue.cpp')
| -rw-r--r-- | src/socketengines/socketengine_kqueue.cpp | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/socketengines/socketengine_kqueue.cpp b/src/socketengines/socketengine_kqueue.cpp new file mode 100644 index 000000000..18a2261ef --- /dev/null +++ b/src/socketengines/socketengine_kqueue.cpp @@ -0,0 +1,169 @@ +/* +------------------------------------+ + * | Inspire Internet Relay Chat Daemon | + * +------------------------------------+ + * + * InspIRCd: (C) 2002-2007 InspIRCd Development Team + * See: http://www.inspircd.org/wiki/index.php/Credits + * + * This program is free but copyrighted software; see + * the file COPYING for details. + * + * --------------------------------------------------- + */ + +#include "inspircd.h" +#include "exitcodes.h" +#include <sys/types.h> +#include <sys/event.h> +#include <sys/time.h> +#include "socketengines/socketengine_kqueue.h" + + +KQueueEngine::KQueueEngine(InspIRCd* Instance) : SocketEngine(Instance) +{ + this->RecoverFromFork(); +} + +void KQueueEngine::RecoverFromFork() +{ + /* + * The only bad thing about kqueue is that its fd cant survive a fork and is not inherited. + * BUM HATS. + * + */ + EngineHandle = kqueue(); + if (EngineHandle == -1) + { + ServerInstance->Log(SPARSE,"ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features."); + ServerInstance->Log(SPARSE,"ERROR: this is a fatal error, exiting now."); + printf("ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features."); + printf("ERROR: this is a fatal error, exiting now."); + ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE); + } + CurrentSetSize = 0; +} + +KQueueEngine::~KQueueEngine() +{ + this->Close(EngineHandle); +} + +bool KQueueEngine::AddFd(EventHandler* eh) +{ + int fd = eh->GetFd(); + + if ((fd < 0) || (fd > MAX_DESCRIPTORS)) + return false; + + if (GetRemainingFds() <= 1) + return false; + + if (ref[fd]) + return false; + + struct kevent ke; + EV_SET(&ke, fd, eh->Readable() ? EVFILT_READ : EVFILT_WRITE, EV_ADD, 0, 0, NULL); + + int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL); + if (i == -1) + { + return false; + } + + ref[fd] = eh; + CurrentSetSize++; + + ServerInstance->Log(DEBUG,"New file descriptor: %d", fd); + return true; +} + +bool KQueueEngine::DelFd(EventHandler* eh, bool force) +{ + int fd = eh->GetFd(); + + if ((fd < 0) || (fd > MAX_DESCRIPTORS)) + return false; + + struct kevent ke; + EV_SET(&ke, eh->GetFd(), EVFILT_READ, EV_DELETE, 0, 0, NULL); + + int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL); + + EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL); + + int j = kevent(EngineHandle, &ke, 1, 0, 0, NULL); + + if ((j < 0) && (i < 0) && !force) + return false; + + CurrentSetSize--; + ref[fd] = NULL; + + ServerInstance->Log(DEBUG,"Remove file descriptor: %d", fd); + return true; +} + +void KQueueEngine::WantWrite(EventHandler* eh) +{ + /** When changing an item in a kqueue, there is no 'modify' call + * as in epoll. Instead, we add the item again, and this overwrites + * the original setting rather than adding it twice. See man kqueue. + */ + struct kevent ke; + EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_ADD | EV_ONESHOT, 0, 0, NULL); + kevent(EngineHandle, &ke, 1, 0, 0, NULL); +} + +int KQueueEngine::GetMaxFds() +{ + return MAX_DESCRIPTORS; +} + +int KQueueEngine::GetRemainingFds() +{ + return MAX_DESCRIPTORS - CurrentSetSize; +} + +int KQueueEngine::DispatchEvents() +{ + ts.tv_nsec = 0; + ts.tv_sec = 1; + int i = kevent(EngineHandle, NULL, 0, &ke_list[0], MAX_DESCRIPTORS, &ts); + for (int j = 0; j < i; j++) + { + if (ke_list[j].flags & EV_EOF) + { + /* We love you kqueue, oh yes we do *sings*! + * kqueue gives us the error number directly in the EOF state! + * Unlike smelly epoll and select, where we have to getsockopt + * to get the error, this saves us time and cpu cycles. Go BSD! + */ + if (ref[ke_list[j].ident]) + ref[ke_list[j].ident]->HandleEvent(EVENT_ERROR, ke_list[j].fflags); + continue; + } + if (ke_list[j].flags & EVFILT_WRITE) + { + /* This looks wrong but its right. As above, theres no modify + * call in kqueue. See the manpage. + */ + struct kevent ke; + EV_SET(&ke, ke_list[j].ident, EVFILT_READ, EV_ADD, 0, 0, NULL); + kevent(EngineHandle, &ke, 1, 0, 0, NULL); + if (ref[ke_list[j].ident]) + ref[ke_list[j].ident]->HandleEvent(EVENT_WRITE); + } + else + { + if (ref[ke_list[j].ident]) + ref[ke_list[j].ident]->HandleEvent(EVENT_READ); + } + } + + return i; +} + +std::string KQueueEngine::GetName() +{ + return "kqueue"; +} |