Move socketengines into their own dir. This was all w00t's idea, but i told him no because i didnt think it would work. Now ive done it myself :P ner ner ne ner ner :)

git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@8332 e03df62e-2008-0410-955e-edbf42e46eb7

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";
+}