1 files changed, 121 insertions, 0 deletions
diff --git a/src/socketengines/epoll.cpp b/src/socketengines/epoll.cpp
new file mode 100644
index 000000000..470db7ce8
--- /dev/null
+++ b/src/socketengines/epoll.cpp
@@ -0,0 +1,121 @@
+/*
+ *
+ * (C) 2003-2024 Anope Team
+ * Contact us at team@anope.org
+ *
+ * Please read COPYING and README for further details.
+ *
+ * Based on the original code of Epona by Lara.
+ * Based on the original code of Services by Andy Church.
+ */
+
+#include "services.h"
+#include "anope.h"
+#include "sockets.h"
+#include "socketengine.h"
+#include "config.h"
+
+#include <cerrno>
+#include <sys/epoll.h>
+#include <ulimit.h>
+
+static int EngineHandle;
+static std::vector<epoll_event> events;
+
+void SocketEngine::Init()
+{
+	EngineHandle = epoll_create(4);
+
+	if (EngineHandle == -1)
+		throw SocketException("Could not initialize epoll socket engine: " + Anope::LastError());
+
+	events.resize(DefaultSize);
+}
+
+void SocketEngine::Shutdown()
+{
+	while (!Sockets.empty())
+		delete Sockets.begin()->second;
+}
+
+void SocketEngine::Change(Socket *s, bool set, SocketFlag flag)
+{
+	if (set == s->flags[flag])
+		return;
+
+	bool before_registered = s->flags[SF_READABLE] || s->flags[SF_WRITABLE];
+
+	s->flags[flag] = set;
+
+	bool now_registered = s->flags[SF_READABLE] || s->flags[SF_WRITABLE];
+
+	epoll_event ev;
+
+	memset(&ev, 0, sizeof(ev));
+
+	ev.events = (s->flags[SF_READABLE] ? EPOLLIN : 0u) | (s->flags[SF_WRITABLE] ? EPOLLOUT : 0u);
+	ev.data.fd = s->GetFD();
+
+	int mod;
+	if (!before_registered && now_registered)
+		mod = EPOLL_CTL_ADD;
+	else if (before_registered && !now_registered)
+		mod = EPOLL_CTL_DEL;
+	else if (before_registered && now_registered)
+		mod = EPOLL_CTL_MOD;
+	else
+		return;
+
+	if (epoll_ctl(EngineHandle, mod, ev.data.fd, &ev) == -1)
+		 throw SocketException("Unable to epoll_ctl() fd " + Anope::ToString(ev.data.fd) + " to epoll: " + Anope::LastError());
+}
+
+void SocketEngine::Process()
+{
+	if (Sockets.size() > events.size())
+		events.resize(events.size() * 2);
+
+	int total = epoll_wait(EngineHandle, &events.front(), events.size(), Config->ReadTimeout * 1000);
+	Anope::UpdateTime();
+
+	/* EINTR can be given if the read timeout expires */
+	if (total == -1)
+	{
+		if (errno != EINTR)
+			Log() << "SockEngine::Process(): error: " << Anope::LastError();
+		return;
+	}
+
+	for (int i = 0; i < total; ++i)
+	{
+		epoll_event &ev = events[i];
+
+		std::map<int, Socket *>::iterator it = Sockets.find(ev.data.fd);
+		if (it == Sockets.end())
+			continue;
+		Socket *s = it->second;
+
+		if (ev.events & (EPOLLHUP | EPOLLERR))
+		{
+			s->ProcessError();
+			delete s;
+			continue;
+		}
+
+		if (!s->Process())
+		{
+			if (s->flags[SF_DEAD])
+				delete s;
+			continue;
+		}
+
+		if ((ev.events & EPOLLIN) && !s->ProcessRead())
+			s->flags[SF_DEAD] = true;
+
+		if ((ev.events & EPOLLOUT) && !s->ProcessWrite())
+			s->flags[SF_DEAD] = true;
+
+		if (s->flags[SF_DEAD])
+			delete s;
+	}
+}