* Seperate out socket engines into derived classes of SocketEngine.

* Add a classfactory SocketEngineFactory to create a new socketengine of the configured type
* Implement configure hax to compile only the required socketengine and the base class
* Eliminates ugly defines, and is more in line with C++ ways


git-svn-id: http://svn.inspircd.org/repository/trunk/inspircd@4439 e03df62e-2008-0410-955e-edbf42e46eb7

1 files changed, 129 insertions, 0 deletions

diff --git a/src/socketengine_epoll.cpp b/src/socketengine_epoll.cpp
new file mode 100644
index 000000000..d1a761d5b
--- /dev/null
+++ b/src/socketengine_epoll.cpp
@@ -0,0 +1,129 @@
+/*       +------------------------------------+
+ *       | Inspire Internet Relay Chat Daemon |
+ *       +------------------------------------+
+ *
+ *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
+ *                       E-mail:
+ *                <brain@chatspike.net>
+ *                <Craig@chatspike.net>
+ *
+ * Written by Craig Edwards, Craig McLure, and others.
+ * This program is free but copyrighted software; see
+ *            the file COPYING for details.
+ *
+ * ---------------------------------------------------
+ */
+
+#include "inspircd_config.h"
+#include "globals.h"
+#include "inspircd.h"
+#include <sys/epoll.h>
+#include <vector>
+#include <string>
+#include "socketengine_epoll.h"
+#include "helperfuncs.h"
+
+EPollEngine::EPollEngine()
+{
+	EngineHandle = epoll_create(MAX_DESCRIPTORS);
+
+	if (EngineHandle == -1)
+	{
+		log(SPARSE,"ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features.");
+		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.");
+		Exit(0);
+	}
+	CurrentSetSize = 0;
+}
+
+EPollEngine::~EPollEngine()
+{
+	close(EngineHandle);
+}
+
+bool EPollEngine::AddFd(int fd, bool readable, char type)
+{
+	if ((fd < 0) || (fd > MAX_DESCRIPTORS))
+	{
+		log(DEFAULT,"ERROR: FD of %d added above max of %d",fd,MAX_DESCRIPTORS);
+		return false;
+	}
+	if (GetRemainingFds() <= 1)
+	{
+		log(DEFAULT,"ERROR: System out of file descriptors!");
+		return false;
+	}
+	ref[fd] = type;
+	if (readable)
+	{
+		log(DEBUG,"Set readbit");
+		ref[fd] |= X_READBIT;
+	}
+	log(DEBUG,"Add socket %d",fd);
+
+	struct epoll_event ev;
+	memset(&ev,0,sizeof(struct epoll_event));
+	log(DEBUG,"epoll: Add socket to events, ep=%d socket=%d",EngineHandle,fd);
+	readable ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
+	ev.data.fd = fd;
+	int i = epoll_ctl(EngineHandle, EPOLL_CTL_ADD, fd, &ev);
+	if (i < 0)
+	{
+		log(DEBUG,"epoll: List insertion failure!");
+		return false;
+	}
+
+	CurrentSetSize++;
+	return true;
+}
+
+bool EPollEngine::DelFd(int fd)
+{
+	log(DEBUG,"EPollEngine::DelFd(%d)",fd);
+
+	if ((fd < 0) || (fd > MAX_DESCRIPTORS))
+		return false;
+
+	struct epoll_event ev;
+	memset(&ev,0,sizeof(struct epoll_event));
+	ref[fd] && X_READBIT ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
+	ev.data.fd = fd;
+	int i = epoll_ctl(EngineHandle, EPOLL_CTL_DEL, fd, &ev);
+	if (i < 0)
+	{
+		log(DEBUG,"epoll: List deletion failure!");
+		return false;
+	}
+
+	CurrentSetSize--;
+	ref[fd] = 0;
+	return true;
+}
+
+int EPollEngine::GetMaxFds()
+{
+	return MAX_DESCRIPTORS;
+}
+
+int EPollEngine::GetRemainingFds()
+{
+	return MAX_DESCRIPTORS - CurrentSetSize;
+}
+
+int EPollEngine::Wait(int* fdlist)
+{
+	int result = 0;
+
+	int i = epoll_wait(EngineHandle, events, MAX_DESCRIPTORS, 50);
+	for (int j = 0; j < i; j++)
+		fdlist[result++] = events[j].data.fd;
+
+	return result;
+}
+
+std::string EPollEngine::GetName()
+{
+	return "epoll";
+}