1 /***************************************************************************
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
10 * Copyright (C) 2002 by Björn Stenberg
12 * All files in this archive are subject to the GNU General Public License.
13 * See the file COPYING in the source tree root for full license agreement.
15 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
16 * KIND, either express or implied.
18 ****************************************************************************/
24 /* wrap-safe macros for tick comparison */
25 #define TIME_AFTER(a,b) ((long)(b) - (long)(a) < 0)
26 #define TIME_BEFORE(a,b) TIME_AFTER(b,a)
28 #define HZ 100 /* number of ticks per second */
30 #define MAX_NUM_TICK_TASKS 4
32 #define QUEUE_LENGTH 16 /* MUST be a power of 2 */
33 #define QUEUE_LENGTH_MASK (QUEUE_LENGTH - 1)
35 /* System defined message ID's */
36 #define SYS_USB_CONNECTED -1
37 #define SYS_USB_CONNECTED_ACK -2
38 #define SYS_USB_DISCONNECTED -3
39 #define SYS_USB_DISCONNECTED_ACK -4
40 #define SYS_TIMEOUT -5
50 struct event events
[QUEUE_LENGTH
];
60 /* global tick variable */
61 extern long current_tick
;
63 /* kernel functions */
64 extern void kernel_init(void);
65 extern void yield(void);
66 extern void sleep(int ticks
);
67 int set_irq_level(int level
);
68 int tick_add_task(void (*f
)(void));
69 int tick_remove_task(void (*f
)(void));
71 extern void queue_init(struct event_queue
*q
);
72 extern void queue_wait(struct event_queue
*q
, struct event
*ev
);
73 extern void queue_wait_w_tmo(struct event_queue
*q
, struct event
*ev
, int ticks
);
74 extern void queue_post(struct event_queue
*q
, int id
, void *data
);
75 extern bool queue_empty(struct event_queue
* q
);
76 extern int queue_broadcast(int id
, void *data
);
78 extern void mutex_init(struct mutex
*m
);
79 extern void mutex_lock(struct mutex
*m
);
80 extern void mutex_unlock(struct mutex
*m
);