11ac0b3f2a
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22148 a1c6a512-1295-4272-9138-f99709370657
125 lines
3.3 KiB
C
125 lines
3.3 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) 2009 Wincent Balin
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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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#include "plugin.h"
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#include "pdbox.h"
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/* Datagram pool will contains 16 datagrams. */
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#define MAX_DATAGRAMS 16
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/* Datagram pool. */
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struct datagram datagrams[MAX_DATAGRAMS];
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/* UDP message queues. */
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struct event_queue gui_to_core;
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struct event_queue core_to_gui;
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/* Initialize net infrastructure. */
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void net_init(void)
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{
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unsigned int i;
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/* Initialize message pool. */
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for(i = 0; i < MAX_DATAGRAMS; i++)
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datagrams[i].used = false;
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/* Initialize and register message queues. */
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rb->queue_init(&gui_to_core, true);
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rb->queue_init(&core_to_gui, true);
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}
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/* Send datagram. */
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bool send_datagram(struct event_queue* route,
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int port,
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char* data,
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size_t size)
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{
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unsigned int i;
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/* If datagram too long, abort. */
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if(size > MAX_DATAGRAM_SIZE)
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return false;
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/* Find free datagram buffer. */
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for(i = 0; i < MAX_DATAGRAMS; i++)
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if(!datagrams[i].used)
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break;
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/* If no free buffer found, abort. */
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if(i == MAX_DATAGRAMS)
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return false;
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/* Copy datagram to the buffer. */
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memcpy(datagrams[i].data, data, size);
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datagrams[i].size = size;
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/* Mark datagram buffer as used. */
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datagrams[i].used = true;
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/* Send event via route. */
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rb->queue_post(route, port, (intptr_t) &datagrams[i]);
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/* Everything went ok. */
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return true;
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}
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/* Receive datagram. */
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bool receive_datagram(struct event_queue* route,
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int port,
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struct datagram* buffer)
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{
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struct queue_event event;
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/* If route queue empty, abort. */
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if(rb->queue_empty(route))
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return false;
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/* Receive event. */
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rb->queue_wait(route, &event);
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/* If wrong port, abort.
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NOTE: Event is removed from the queue in any case! */
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if(event.id != port)
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return false;
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/* Copy datagram. */
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memcpy(buffer, (struct datagram*) event.data, sizeof(struct datagram));
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/* Clear datagram event. */
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memset(((struct datagram*) event.data)->data,
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0,
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((struct datagram*) event.data)->size);
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/* Free datagram event. */
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((struct datagram*) event.data)->used = false;
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/* Everything went ok. */
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return true;
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}
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/* Destroy net infrastructure. */
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void net_destroy(void)
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{
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/* Remove message queues. */
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rb->queue_delete(&gui_to_core);
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rb->queue_delete(&core_to_gui);
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}
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