From cbb8fda4a7e763738e9675ec9f96286c87879176 Mon Sep 17 00:00:00 2001
From: brain <brain@e03df62e-2008-0410-955e-edbf42e46eb7>
Date: Tue, 23 Oct 2007 22:30:25 +0000
Subject: 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
---
 src/socketengines/socketengine_epoll.cpp | 164 +++++++++++++++++++++++++++++++
 1 file changed, 164 insertions(+)
 create mode 100644 src/socketengines/socketengine_epoll.cpp

(limited to 'src/socketengines/socketengine_epoll.cpp')

diff --git a/src/socketengines/socketengine_epoll.cpp b/src/socketengines/socketengine_epoll.cpp
new file mode 100644
index 000000000..9da569b8f
--- /dev/null
+++ b/src/socketengines/socketengine_epoll.cpp
@@ -0,0 +1,164 @@
+/*       +------------------------------------+
+ *       | 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/epoll.h>
+#include "socketengines/socketengine_epoll.h"
+
+EPollEngine::EPollEngine(InspIRCd* Instance) : SocketEngine(Instance)
+{
+	EngineHandle = epoll_create(MAX_DESCRIPTORS);
+
+	if (EngineHandle == -1)
+	{
+		ServerInstance->Log(SPARSE,"ERROR: Could not initialize socket engine: %s", strerror(errno));
+		ServerInstance->Log(SPARSE,"ERROR: Your kernel probably does not have the proper features. This is a fatal error, exiting now.");
+		printf("ERROR: Could not initialize socket engine: %s\n", strerror(errno));
+		printf("ERROR: Your kernel probably does not have the proper features. This is a fatal error, exiting now.\n");
+		ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
+	}
+	CurrentSetSize = 0;
+}
+
+EPollEngine::~EPollEngine()
+{
+	this->Close(EngineHandle);
+}
+
+bool EPollEngine::AddFd(EventHandler* eh)
+{
+	int fd = eh->GetFd();
+	if ((fd < 0) || (fd > MAX_DESCRIPTORS))
+	{
+		ServerInstance->Log(DEBUG,"Out of range FD");
+		return false;
+	}
+
+	if (GetRemainingFds() <= 1)
+		return false;
+
+	if (ref[fd])
+		return false;
+
+	struct epoll_event ev;
+	memset(&ev,0,sizeof(struct epoll_event));
+	eh->Readable() ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
+	ev.data.fd = fd;
+	int i = epoll_ctl(EngineHandle, EPOLL_CTL_ADD, fd, &ev);
+	if (i < 0)
+	{
+		return false;
+	}
+
+	ServerInstance->Log(DEBUG,"New file descriptor: %d", fd);
+
+	ref[fd] = eh;
+	CurrentSetSize++;
+	return true;
+}
+
+void EPollEngine::WantWrite(EventHandler* eh)
+{
+	/** Use oneshot so that the system removes the writeable
+	 * status for us and saves us a call.
+	 */
+	struct epoll_event ev;
+	memset(&ev,0,sizeof(struct epoll_event));
+	ev.events = EPOLLOUT;
+	ev.data.fd = eh->GetFd();
+	epoll_ctl(EngineHandle, EPOLL_CTL_MOD, eh->GetFd(), &ev);
+}
+
+bool EPollEngine::DelFd(EventHandler* eh, bool force)
+{
+	int fd = eh->GetFd();
+	if ((fd < 0) || (fd > MAX_DESCRIPTORS))
+		return false;
+
+	struct epoll_event ev;
+	memset(&ev,0,sizeof(struct epoll_event));
+	eh->Readable() ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
+	ev.data.fd = fd;
+	int i = epoll_ctl(EngineHandle, EPOLL_CTL_DEL, fd, &ev);
+
+	if (i < 0 && !force)
+	{
+		ServerInstance->Log(DEBUG,"Cant remove socket: %s", strerror(errno));
+		return false;
+	}
+
+	ref[fd] = NULL;
+	CurrentSetSize--;
+
+	ServerInstance->Log(DEBUG,"Remove file descriptor: %d", fd);
+	return true;
+}
+
+int EPollEngine::GetMaxFds()
+{
+	return MAX_DESCRIPTORS;
+}
+
+int EPollEngine::GetRemainingFds()
+{
+	return MAX_DESCRIPTORS - CurrentSetSize;
+}
+
+int EPollEngine::DispatchEvents()
+{
+	socklen_t codesize;
+	int errcode;
+	int i = epoll_wait(EngineHandle, events, MAX_DESCRIPTORS, 1000);
+	for (int j = 0; j < i; j++)
+	{
+		if (events[j].events & EPOLLHUP)
+		{
+			if (ref[events[j].data.fd])
+				ref[events[j].data.fd]->HandleEvent(EVENT_ERROR, 0);
+			continue;
+		}
+		if (events[j].events & EPOLLERR)
+		{
+			/* Get error number */
+			if (getsockopt(events[j].data.fd, SOL_SOCKET, SO_ERROR, &errcode, &codesize) < 0)
+				errcode = errno;
+			if (ref[events[j].data.fd])
+				ref[events[j].data.fd]->HandleEvent(EVENT_ERROR, errcode);
+			continue;
+		}
+		if (events[j].events & EPOLLOUT)
+		{
+			struct epoll_event ev;
+			memset(&ev,0,sizeof(struct epoll_event));
+			ev.events = EPOLLIN;
+			ev.data.fd = events[j].data.fd;
+			epoll_ctl(EngineHandle, EPOLL_CTL_MOD, events[j].data.fd, &ev);
+			if (ref[events[j].data.fd])
+				ref[events[j].data.fd]->HandleEvent(EVENT_WRITE);
+		}
+		else
+		{
+			if (ref[events[j].data.fd])
+				ref[events[j].data.fd]->HandleEvent(EVENT_READ);
+		}
+	}
+
+	return i;
+}
+
+std::string EPollEngine::GetName()
+{
+	return "epoll";
+}
+
-- 
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