Updates to slave catchup mode to use fake events

Addition of fake EPOLLOUT event mechanism

New memlog feature for debugging purposes

server/include/memlog.h

@@ -0,0 +1,51 @@
+#ifndef _MEMLOG_H
+#define _MEMLOG_H
+/*
+ * This file is distributed as part of MariaDB MaxScale.  It 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, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Copyright MariaDB Ab 2014
+ */
+
+/**
+ * @file memlog.h The memory logging mechanism
+ *
+ * @verbatim
+ * Revision History
+ *
+ * Date		Who		Description
+ * 26/09/14	Mark Riddoch	Initial implementation
+ *
+ * @endverbatim
+ */
+#include <spinlock.h>
+
+typedef enum { ML_INT, ML_LONG, ML_LONGLONG, ML_STRING } MEMLOGTYPE;
+
+typedef struct memlog {
+	char		*name;
+	SPINLOCK	lock;
+	void		*values;
+	int		offset;
+	int		size;
+	MEMLOGTYPE	type;
+	struct memlog	*next;
+} MEMLOG;
+
+
+extern	MEMLOG *memlog_create(char *, MEMLOGTYPE, int);
+extern	void	memlog_destroy(MEMLOG *);
+extern	void	memlog_log(MEMLOG *, void *);
+extern	void	memlog_flush_all();
+#endif