Remove unnecessary prefix from socketengine source files.

1 files changed, 219 insertions, 0 deletions

diff --git a/src/socketengines/kqueue.cpp b/src/socketengines/kqueue.cpp
new file mode 100644
index 000000000..9d1ca6d3c
--- /dev/null
+++ b/src/socketengines/kqueue.cpp
@@ -0,0 +1,219 @@
+/*
+ * InspIRCd -- Internet Relay Chat Daemon
+ *
+ *   Copyright (C) 2014-2015 Attila Molnar <attilamolnar@hush.com>
+ *   Copyright (C) 2014 Adam <Adam@anope.org>
+ *   Copyright (C) 2012-2013, 2017, 2019 Sadie Powell <sadie@witchery.services>
+ *   Copyright (C) 2012 Robby <robby@chatbelgie.be>
+ *   Copyright (C) 2009-2010 Daniel De Graaf <danieldg@inspircd.org>
+ *   Copyright (C) 2009 Uli Schlachter <psychon@inspircd.org>
+ *   Copyright (C) 2008 Thomas Stagner <aquanight@inspircd.org>
+ *   Copyright (C) 2007 Dennis Friis <peavey@inspircd.org>
+ *   Copyright (C) 2006-2008, 2010 Craig Edwards <brain@inspircd.org>
+ *
+ * This file is part of InspIRCd.  InspIRCd is free software: you can
+ * redistribute it and/or modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#include "inspircd.h"
+
+#include <sys/types.h>
+#include <sys/event.h>
+#include <sys/time.h>
+#include <sys/sysctl.h>
+
+/** A specialisation of the SocketEngine class, designed to use BSD kqueue().
+ */
+namespace
+{
+	int EngineHandle;
+	unsigned int ChangePos = 0;
+	/** These are used by kqueue() to hold socket events
+	 */
+	std::vector<struct kevent> ke_list(16);
+
+	/** Pending changes
+	 */
+	std::vector<struct kevent> changelist(8);
+
+#if defined __NetBSD__ && __NetBSD_Version__ <= 999001400
+	inline intptr_t udata_cast(EventHandler* eh)
+	{
+		// On NetBSD <10 the last parameter of EV_SET is intptr_t.
+		return reinterpret_cast<intptr_t>(eh);
+	}
+#else
+	inline void* udata_cast(EventHandler* eh)
+	{
+		// On other platforms the last parameter of EV_SET is void*.
+		return static_cast<void*>(eh);
+	}
+#endif
+}
+
+/** Initialize the kqueue engine
+ */
+void SocketEngine::Init()
+{
+	LookupMaxFds();
+	RecoverFromFork();
+}
+
+void SocketEngine::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)
+		InitError();
+}
+
+/** Shutdown the kqueue engine
+ */
+void SocketEngine::Deinit()
+{
+	Close(EngineHandle);
+}
+
+static struct kevent* GetChangeKE()
+{
+	if (ChangePos >= changelist.size())
+		changelist.resize(changelist.size() * 2);
+	return &changelist[ChangePos++];
+}
+
+bool SocketEngine::AddFd(EventHandler* eh, int event_mask)
+{
+	int fd = eh->GetFd();
+
+	if (fd < 0)
+		return false;
+
+	if (!SocketEngine::AddFdRef(eh))
+		return false;
+
+	// We always want to read from the socket...
+	struct kevent* ke = GetChangeKE();
+	EV_SET(ke, fd, EVFILT_READ, EV_ADD, 0, 0, udata_cast(eh));
+
+	ServerInstance->Logs.Log("SOCKET", LOG_DEBUG, "New file descriptor: %d", fd);
+
+	eh->SetEventMask(event_mask);
+	OnSetEvent(eh, 0, event_mask);
+	ResizeDouble(ke_list);
+
+	return true;
+}
+
+void SocketEngine::DelFd(EventHandler* eh)
+{
+	int fd = eh->GetFd();
+
+	if (fd < 0)
+	{
+		ServerInstance->Logs.Log("SOCKET", LOG_DEFAULT, "DelFd() on invalid fd: %d", fd);
+		return;
+	}
+
+	// First remove the write filter ignoring errors, since we can't be
+	// sure if there are actually any write filters registered.
+	struct kevent* ke = GetChangeKE();
+	EV_SET(ke, eh->GetFd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
+
+	// Then remove the read filter.
+	ke = GetChangeKE();
+	EV_SET(ke, eh->GetFd(), EVFILT_READ, EV_DELETE, 0, 0, NULL);
+
+	SocketEngine::DelFdRef(eh);
+
+	ServerInstance->Logs.Log("SOCKET", LOG_DEBUG, "Remove file descriptor: %d", fd);
+}
+
+void SocketEngine::OnSetEvent(EventHandler* eh, int old_mask, int new_mask)
+{
+	if ((new_mask & FD_WANT_POLL_WRITE) && !(old_mask & FD_WANT_POLL_WRITE))
+	{
+		// new poll-style write
+		struct kevent* ke = GetChangeKE();
+		EV_SET(ke, eh->GetFd(), EVFILT_WRITE, EV_ADD, 0, 0, udata_cast(eh));
+	}
+	else if ((old_mask & FD_WANT_POLL_WRITE) && !(new_mask & FD_WANT_POLL_WRITE))
+	{
+		// removing poll-style write
+		struct kevent* ke = GetChangeKE();
+		EV_SET(ke, eh->GetFd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
+	}
+	if ((new_mask & (FD_WANT_FAST_WRITE | FD_WANT_SINGLE_WRITE)) && !(old_mask & (FD_WANT_FAST_WRITE | FD_WANT_SINGLE_WRITE)))
+	{
+		struct kevent* ke = GetChangeKE();
+		EV_SET(ke, eh->GetFd(), EVFILT_WRITE, EV_ADD | EV_ONESHOT, 0, 0, udata_cast(eh));
+	}
+}
+
+int SocketEngine::DispatchEvents()
+{
+	struct timespec ts;
+	ts.tv_nsec = 0;
+	ts.tv_sec = 1;
+
+	int i = kevent(EngineHandle, &changelist.front(), ChangePos, &ke_list.front(), ke_list.size(), &ts);
+	ChangePos = 0;
+	ServerInstance->UpdateTime();
+
+	if (i < 0)
+		return i;
+
+	stats.TotalEvents += i;
+
+	for (int j = 0; j < i; j++)
+	{
+		// This can't be a static_cast because udata is intptr_t on NetBSD.
+		struct kevent& kev = ke_list[j];
+		EventHandler* eh = reinterpret_cast<EventHandler*>(kev.udata);
+		if (!eh)
+			continue;
+
+		// Copy these in case the vector gets resized and kev invalidated
+		const int fd = eh->GetFd();
+		const short filter = kev.filter;
+		if (fd < 0)
+			continue;
+
+		if (kev.flags & EV_EOF)
+		{
+			stats.ErrorEvents++;
+			eh->OnEventHandlerError(kev.fflags);
+			continue;
+		}
+		if (filter == EVFILT_WRITE)
+		{
+			/* When mask is FD_WANT_FAST_WRITE or FD_WANT_SINGLE_WRITE,
+			 * we set a one-shot write, so we need to clear that bit
+			 * to detect when it set again.
+			 */
+			const int bits_to_clr = FD_WANT_SINGLE_WRITE | FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK;
+			eh->SetEventMask(eh->GetEventMask() & ~bits_to_clr);
+			eh->OnEventHandlerWrite();
+		}
+		else if (filter == EVFILT_READ)
+		{
+			eh->SetEventMask(eh->GetEventMask() & ~FD_READ_WILL_BLOCK);
+			eh->OnEventHandlerRead();
+		}
+	}
+
+	return i;
+}