--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/master/coe_emerg_ring.h	Tue Nov 06 14:23:44 2012 +0100
@@ -0,0 +1,78 @@
+/******************************************************************************
+ *
+ *  $Id$
+ *
+ *  Copyright (C) 2012  Florian Pose, Ingenieurgemeinschaft IgH
+ *
+ *  This file is part of the IgH EtherCAT Master.
+ *
+ *  The IgH EtherCAT Master is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public License version 2, as
+ *  published by the Free Software Foundation.
+ *
+ *  The IgH EtherCAT Master 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 the IgH EtherCAT Master; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *  ---
+ *
+ *  The license mentioned above concerns the source code only. Using the
+ *  EtherCAT technology and brand is only permitted in compliance with the
+ *  industrial property and similar rights of Beckhoff Automation GmbH.
+ *
+ *****************************************************************************/
+
+/**
+   \file
+   EtherCAT CoE emergency ring buffer structure.
+*/
+
+/*****************************************************************************/
+
+#ifndef __EC_COE_EMERG_RING_H__
+#define __EC_COE_EMERG_RING_H__
+
+#include "globals.h"
+
+/*****************************************************************************/
+
+/** EtherCAT CoE emergency message record.
+ */
+typedef struct {
+    u8 data[EC_COE_EMERGENCY_MSG_SIZE];
+} ec_coe_emerg_msg_t;
+
+/*****************************************************************************/
+
+/** EtherCAT CoE emergency ring buffer.
+ */
+typedef struct {
+    ec_slave_config_t *sc; /**< Slave configuration  owning the ring. */
+
+    ec_coe_emerg_msg_t *msgs;
+    size_t size;
+
+    unsigned int read_index;
+    unsigned int write_index;
+    unsigned int overruns;
+} ec_coe_emerg_ring_t;
+
+/*****************************************************************************/
+
+void ec_coe_emerg_ring_init(ec_coe_emerg_ring_t *, ec_slave_config_t *);
+void ec_coe_emerg_ring_clear(ec_coe_emerg_ring_t *);
+
+int ec_coe_emerg_ring_size(ec_coe_emerg_ring_t *, size_t);
+void ec_coe_emerg_ring_push(ec_coe_emerg_ring_t *, const u8 *);
+int ec_coe_emerg_ring_pop(ec_coe_emerg_ring_t *, u8 *);
+int ec_coe_emerg_ring_clear_ring(ec_coe_emerg_ring_t *);
+int ec_coe_emerg_ring_overruns(ec_coe_emerg_ring_t *);
+
+/*****************************************************************************/
+
+#endif