From ba61afbc2b274d4377521324ef9feb23be24949f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=B6nke=20Ludwig?= <sludwig@rejectedsoftware.com>
Date: Tue, 29 Nov 2016 11:56:23 +0100
Subject: [PATCH] Introduce debug version EventCoreEpollDebug.

Outputs some debug log messages for the epoll backend.
---
 source/eventcore/drivers/epoll.d | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/source/eventcore/drivers/epoll.d b/source/eventcore/drivers/epoll.d
index cbaf2d4..9432832 100644
--- a/source/eventcore/drivers/epoll.d
+++ b/source/eventcore/drivers/epoll.d
@@ -37,16 +37,16 @@ final class EpollEventLoop : PosixEventLoop {
 		import std.algorithm : min;
 		//assert(Fiber.getThis() is null, "processEvents may not be called from within a fiber!");
 
-		//print("wait %s", m_events.length);
+		debug (EventCoreEpollDebug) print("Epoll wait %s, %s", m_events.length, timeout);
 		long tomsec;
 		if (timeout == Duration.max) tomsec = long.max;
 		else tomsec = (timeout.total!"hnsecs" + 9999) / 10_000;
 		auto ret = epoll_wait(m_epoll, m_events.ptr, cast(int)m_events.length, tomsec > int.max ? -1 : cast(int)tomsec);
-		//print("wait done %s", ret);
+		debug (EventCoreEpollDebug) print("Epoll wait done: %s", ret);
 
 		if (ret > 0) {
 			foreach (ref evt; m_events[0 .. ret]) {
-				//print("event %s %s", evt.data.fd, evt.events);
+				debug (EventCoreEpollDebug) print("Epoll event on %s: %s", evt.data.fd, evt.events);
 				auto fd = cast(FD)evt.data.fd;
 				if (evt.events & EPOLLIN) notify!(EventType.read)(fd);
 				if (evt.events & EPOLLOUT) notify!(EventType.write)(fd);
@@ -65,7 +65,7 @@ final class EpollEventLoop : PosixEventLoop {
 
 	override void registerFD(FD fd, EventMask mask)
 	{
-		//print("register %s %s", fd, mask);
+		debug (EventCoreEpollDebug) print("Epoll register FD %s: %s", fd, mask);
 		epoll_event ev;
 		ev.events |= EPOLLET;
 		if (mask & EventMask.read) ev.events |= EPOLLIN;
@@ -77,12 +77,13 @@ final class EpollEventLoop : PosixEventLoop {
 
 	override void unregisterFD(FD fd)
 	{
+		debug (EventCoreEpollDebug) print("Epoll unregister FD %s", fd);
 		() @trusted { epoll_ctl(m_epoll, EPOLL_CTL_DEL, fd, null); } ();
 	}
 
 	override void updateFD(FD fd, EventMask mask)
 	{
-		//print("update %s %s", fd, mask);
+		debug (EventCoreEpollDebug) print("Epoll update FD %s: %s", fd, mask);
 		epoll_event ev;
 		ev.events |= EPOLLET;
 		//ev.events = EPOLLONESHOT;