1 files changed, 82 insertions, 0 deletions

diff --git a/firmware/export/kernel.h b/firmware/export/kernel.h
new file mode 100644
index 0000000000..0f69f43ec0
--- /dev/null
+++ b/firmware/export/kernel.h
@@ -0,0 +1,82 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Björn Stenberg
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#ifndef _KERNEL_H_
+#define _KERNEL_H_
+
+#include <stdbool.h>
+
+/* wrap-safe macros for tick comparison */
+#define TIME_AFTER(a,b)         ((long)(b) - (long)(a) < 0)
+#define TIME_BEFORE(a,b)        TIME_AFTER(b,a)
+
+#define HZ      100 /* number of ticks per second */
+
+#define MAX_NUM_TICK_TASKS 4
+
+#define QUEUE_LENGTH 16 /* MUST be a power of 2 */
+#define QUEUE_LENGTH_MASK (QUEUE_LENGTH - 1)
+
+/* System defined message ID's */
+#define SYS_USB_CONNECTED         -1
+#define SYS_USB_CONNECTED_ACK     -2
+#define SYS_USB_DISCONNECTED      -3
+#define SYS_USB_DISCONNECTED_ACK  -4
+#define SYS_TIMEOUT               -5
+
+struct event
+{
+    int id;
+    void *data;
+};
+
+struct event_queue
+{
+    struct event events[QUEUE_LENGTH];
+    unsigned int read;
+    unsigned int write;
+};
+
+struct mutex
+{
+    bool locked;
+};
+
+/* global tick variable */
+extern long current_tick;
+
+/* kernel functions */
+extern void kernel_init(void);
+extern void yield(void);
+extern void sleep(int ticks);
+int set_irq_level(int level);
+int tick_add_task(void (*f)(void));
+int tick_remove_task(void (*f)(void));
+
+extern void queue_init(struct event_queue *q);
+extern void queue_wait(struct event_queue *q, struct event *ev);
+extern void queue_wait_w_tmo(struct event_queue *q, struct event *ev, int ticks);
+extern void queue_post(struct event_queue *q, int id, void *data);
+extern bool queue_empty(struct event_queue* q);
+extern int queue_broadcast(int id, void *data);
+
+extern void mutex_init(struct mutex *m);
+extern void mutex_lock(struct mutex *m);
+extern void mutex_unlock(struct mutex *m);
+
+#endif