160 lines
7.0 KiB
C
160 lines
7.0 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 by Björn Stenberg
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef QUEUE_H
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#define QUEUE_H
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#include <stdint.h>
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#include "config.h"
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#include "thread.h"
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/* System defined message ID's - |sign bit = 1|class|id| */
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/* Event class list */
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#define SYS_EVENT_CLS_QUEUE 0
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#define SYS_EVENT_CLS_USB 1
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#define SYS_EVENT_CLS_POWER 2
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#define SYS_EVENT_CLS_FILESYS 3
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#define SYS_EVENT_CLS_PLUG 4
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#define SYS_EVENT_CLS_MISC 5
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#define SYS_EVENT_CLS_PRIVATE 7 /* For use inside plugins */
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/* make sure SYS_EVENT_CLS_BITS has enough range */
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/* Bit 31->|S|c...c|i...i| */
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#define SYS_EVENT ((long)(int)(1 << 31))
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#define SYS_EVENT_CLS_BITS (3)
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#define SYS_EVENT_CLS_SHIFT (31-SYS_EVENT_CLS_BITS)
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#define SYS_EVENT_CLS_MASK (((1l << SYS_EVENT_CLS_BITS)-1) << SYS_EVENT_SHIFT)
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#define MAKE_SYS_EVENT(cls, id) (SYS_EVENT | ((long)(cls) << SYS_EVENT_CLS_SHIFT) | (long)(id))
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/* Macros for extracting codes */
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#define SYS_EVENT_CLS(e) (((e) & SYS_EVENT_CLS_MASK) >> SYS_EVENT_SHIFT)
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#define SYS_EVENT_ID(e) ((e) & ~(SYS_EVENT|SYS_EVENT_CLS_MASK))
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#define SYS_TIMEOUT MAKE_SYS_EVENT(SYS_EVENT_CLS_QUEUE, 0)
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#define SYS_USB_CONNECTED MAKE_SYS_EVENT(SYS_EVENT_CLS_USB, 0)
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#define SYS_USB_CONNECTED_ACK MAKE_SYS_EVENT(SYS_EVENT_CLS_USB, 1)
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#define SYS_USB_DISCONNECTED MAKE_SYS_EVENT(SYS_EVENT_CLS_USB, 2)
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#define SYS_USB_LUN_LOCKED MAKE_SYS_EVENT(SYS_EVENT_CLS_USB, 4)
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#define SYS_USB_READ_DATA MAKE_SYS_EVENT(SYS_EVENT_CLS_USB, 5)
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#define SYS_USB_WRITE_DATA MAKE_SYS_EVENT(SYS_EVENT_CLS_USB, 6)
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#define SYS_POWEROFF MAKE_SYS_EVENT(SYS_EVENT_CLS_POWER, 0)
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#define SYS_CHARGER_CONNECTED MAKE_SYS_EVENT(SYS_EVENT_CLS_POWER, 1)
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#define SYS_CHARGER_DISCONNECTED MAKE_SYS_EVENT(SYS_EVENT_CLS_POWER, 2)
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#define SYS_BATTERY_UPDATE MAKE_SYS_EVENT(SYS_EVENT_CLS_POWER, 3)
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#define SYS_FS_CHANGED MAKE_SYS_EVENT(SYS_EVENT_CLS_FILESYS, 0)
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#define SYS_HOTSWAP_INSERTED MAKE_SYS_EVENT(SYS_EVENT_CLS_PLUG, 0)
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#define SYS_HOTSWAP_EXTRACTED MAKE_SYS_EVENT(SYS_EVENT_CLS_PLUG, 1)
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#define SYS_PHONE_PLUGGED MAKE_SYS_EVENT(SYS_EVENT_CLS_PLUG, 2)
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#define SYS_PHONE_UNPLUGGED MAKE_SYS_EVENT(SYS_EVENT_CLS_PLUG, 3)
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#define SYS_REMOTE_PLUGGED MAKE_SYS_EVENT(SYS_EVENT_CLS_PLUG, 4)
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#define SYS_REMOTE_UNPLUGGED MAKE_SYS_EVENT(SYS_EVENT_CLS_PLUG, 5)
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#define SYS_CAR_ADAPTER_RESUME MAKE_SYS_EVENT(SYS_EVENT_CLS_MISC, 0)
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#define SYS_CALL_INCOMING MAKE_SYS_EVENT(SYS_EVENT_CLS_MISC, 3)
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#define SYS_CALL_HUNG_UP MAKE_SYS_EVENT(SYS_EVENT_CLS_MISC, 4)
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#define SYS_VOLUME_CHANGED MAKE_SYS_EVENT(SYS_EVENT_CLS_MISC, 5)
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#define IS_SYSEVENT(ev) ((ev & SYS_EVENT) == SYS_EVENT)
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#define MAX_NUM_QUEUES 32
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#define QUEUE_LENGTH 16 /* MUST be a power of 2 */
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#define QUEUE_LENGTH_MASK (QUEUE_LENGTH - 1)
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struct queue_event
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{
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long id;
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intptr_t data;
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};
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#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
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struct queue_sender_list
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{
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/* If non-NULL, there is a thread waiting for the corresponding event */
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/* Must be statically allocated to put in non-cached ram. */
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struct thread_entry *senders[QUEUE_LENGTH]; /* message->thread map */
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struct __wait_queue list; /* list of senders in map */
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/* Send info for last message dequeued or NULL if replied or not sent */
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struct thread_entry * volatile curr_sender;
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#ifdef HAVE_PRIORITY_SCHEDULING
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struct blocker blocker;
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#endif
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};
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#endif /* HAVE_EXTENDED_MESSAGING_AND_NAME */
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#ifdef HAVE_PRIORITY_SCHEDULING
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#define QUEUE_GET_THREAD(q) \
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(((q)->send == NULL) ? NULL : (q)->send->blocker.thread)
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#else
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/* Queue without priority enabled have no owner provision _at this time_ */
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#define QUEUE_GET_THREAD(q) \
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(NULL)
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#endif
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struct event_queue
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{
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struct __wait_queue queue; /* waiter list */
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struct queue_event events[QUEUE_LENGTH]; /* list of events */
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unsigned int volatile read; /* head of queue */
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unsigned int volatile write; /* tail of queue */
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#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
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struct queue_sender_list * volatile send; /* list of threads waiting for
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reply to an event */
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#ifdef HAVE_PRIORITY_SCHEDULING
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struct blocker *blocker_p; /* priority inheritance info
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for sync message senders */
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#endif
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#endif
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IF_COP( struct corelock cl; ) /* multiprocessor sync */
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};
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extern void queue_init(struct event_queue *q, bool register_queue);
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extern void queue_delete(struct event_queue *q);
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extern void queue_wait(struct event_queue *q, struct queue_event *ev);
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extern void queue_wait_w_tmo(struct event_queue *q, struct queue_event *ev,
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int ticks);
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extern void queue_post(struct event_queue *q, long id, intptr_t data);
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#ifdef HAVE_EXTENDED_MESSAGING_AND_NAME
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extern void queue_enable_queue_send(struct event_queue *q,
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struct queue_sender_list *send,
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unsigned int owner_id);
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extern intptr_t queue_send(struct event_queue *q, long id, intptr_t data);
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extern void queue_reply(struct event_queue *q, intptr_t retval);
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extern bool queue_in_queue_send(struct event_queue *q);
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#endif /* HAVE_EXTENDED_MESSAGING_AND_NAME */
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extern bool queue_empty(const struct event_queue* q);
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extern bool queue_peek(struct event_queue *q, struct queue_event *ev);
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#define QPEEK_FILTER_COUNT_MASK (0xffu) /* 0x00=1 filter, 0xff=256 filters */
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#define QPEEK_FILTER_HEAD_ONLY (1u << 8) /* Ignored if no filters */
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#define QPEEK_REMOVE_EVENTS (1u << 9) /* Remove or discard events */
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#define QPEEK_FILTER1(a) QPEEK_FILTER2((a), (a))
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#define QPEEK_FILTER2(a, b) (&(const long [2]){ (a), (b) })
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extern bool queue_peek_ex(struct event_queue *q,
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struct queue_event *ev,
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unsigned int flags,
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const long (*filters)[2]);
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extern void queue_clear(struct event_queue* q);
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extern void queue_remove_from_head(struct event_queue *q, long id);
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extern int queue_count(const struct event_queue *q);
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extern int queue_broadcast(long id, intptr_t data);
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extern void init_queues(void);
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#endif /* QUEUE_H */
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