WebSVN – HelenOS – Diff – /branches/dynload/kernel/generic/src/console/chardev.c


/*
 * Copyright (c) 2005 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
/** @addtogroup genericconsole
 * @{
 */
/** @file
 */
 
#include <console/chardev.h>
 
#include <synch/waitq.h>
#include <synch/spinlock.h>
 
/** Initialize input character device.
 *
 * @param indev Input character device.
 * @param op    Implementation of input character device operations.
 *
 */
void indev_initialize(char *name, indev_t *indev,
    indev_operations_t *op)
{
    indev->name = name;
    waitq_initialize(&indev->wq);
    spinlock_initialize(&indev->lock, "indev");
    indev->counter = 0;
    indev->index = 0;
    indev->op = op;
}
 
/** Push character read from input character device.
 *
 * @param indev Input character device.
 * @param ch    Character being pushed.
 *
 */
void indev_push_character(indev_t *indev, uint8_t ch)
{
    ASSERT(indev);
   
    spinlock_lock(&indev->lock);
    if (indev->counter == INDEV_BUFLEN - 1) {
        /* Buffer full */
        spinlock_unlock(&indev->lock);
        return;
    }
   
    indev->counter++;
    indev->buffer[indev->index++] = ch;
   
    /* Index modulo size of buffer */
    indev->index = indev->index % INDEV_BUFLEN;
    waitq_wakeup(&indev->wq, WAKEUP_FIRST);
    spinlock_unlock(&indev->lock);
}
 
/** Initialize output character device.
 *
 * @param outdev Output character device.
 * @param op     Implementation of output character device operations.
 *
 */
void outdev_initialize(char *name, outdev_t *outdev,
    outdev_operations_t *op)
{
    outdev->name = name;
    spinlock_initialize(&outdev->lock, "outdev");
    outdev->op = op;
}
 
/** @}
 */
 

Subversion Repositories HelenOS

(root)/branches/dynload/kernel/generic/src/console/chardev.c – Rev 4346 → 4347

Rev 4346		Rev 4347
1	/*	1	/*
2	* Copyright (c) 2005 Jakub Jermar	2	* Copyright (c) 2005 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	/** @addtogroup genericconsole	29	/** @addtogroup genericconsole
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <console/chardev.h>	35	#include <console/chardev.h>
36	#include <putchar.h>	-
37	#include <synch/waitq.h>	36	#include <synch/waitq.h>
38	#include <synch/spinlock.h>	37	#include <synch/spinlock.h>
39		38
40	/** Initialize input character device.	39	/** Initialize input character device.
41	*	40	*
42	* @param indev Input character device.	41	* @param indev Input character device.
43	* @param op Implementation of input character device operations.	42	* @param op Implementation of input character device operations.
44	*	43	*
45	*/	44	*/
46	void indev_initialize(char name, indev_t indev,	45	void indev_initialize(char name, indev_t indev,
47	indev_operations_t *op)	46	indev_operations_t *op)
48	{	47	{
49	indev->name = name;	48	indev->name = name;
50	waitq_initialize(&indev->wq);	49	waitq_initialize(&indev->wq);
51	spinlock_initialize(&indev->lock, "indev");	50	spinlock_initialize(&indev->lock, "indev");
52	indev->counter = 0;	51	indev->counter = 0;
53	indev->index = 0;	52	indev->index = 0;
54	indev->op = op;	53	indev->op = op;
55	}	54	}
56		55
57	/** Push character read from input character device.	56	/** Push character read from input character device.
58	*	57	*
59	* @param indev Input character device.	58	* @param indev Input character device.
60	* @param ch Character being pushed.	59	* @param ch Character being pushed.
61	*	60	*
62	*/	61	*/
63	void indev_push_character(indev_t *indev, uint8_t ch)	62	void indev_push_character(indev_t *indev, uint8_t ch)
64	{	63	{
65	ASSERT(indev);	64	ASSERT(indev);
66		65
67	spinlock_lock(&indev->lock);	66	spinlock_lock(&indev->lock);
68	if (indev->counter == INDEV_BUFLEN - 1) {	67	if (indev->counter == INDEV_BUFLEN - 1) {
69	/* Buffer full */	68	/* Buffer full */
70	spinlock_unlock(&indev->lock);	69	spinlock_unlock(&indev->lock);
71	return;	70	return;
72	}	71	}
73		72
74	indev->counter++;	73	indev->counter++;
75	indev->buffer[indev->index++] = ch;	74	indev->buffer[indev->index++] = ch;
76		75
77	/* Index modulo size of buffer */	76	/* Index modulo size of buffer */
78	indev->index = indev->index % INDEV_BUFLEN;	77	indev->index = indev->index % INDEV_BUFLEN;
79	waitq_wakeup(&indev->wq, WAKEUP_FIRST);	78	waitq_wakeup(&indev->wq, WAKEUP_FIRST);
80	spinlock_unlock(&indev->lock);	79	spinlock_unlock(&indev->lock);
81	}	80	}
82		81
83	/** Initialize output character device.	82	/** Initialize output character device.
84	*	83	*
85	* @param outdev Output character device.	84	* @param outdev Output character device.
86	* @param op Implementation of output character device operations.	85	* @param op Implementation of output character device operations.
87	*	86	*
88	*/	87	*/
89	void outdev_initialize(char name, outdev_t outdev,	88	void outdev_initialize(char name, outdev_t outdev,
90	outdev_operations_t *op)	89	outdev_operations_t *op)
91	{	90	{
92	outdev->name = name;	91	outdev->name = name;
93	spinlock_initialize(&outdev->lock, "outdev");	92	spinlock_initialize(&outdev->lock, "outdev");
94	outdev->op = op;	93	outdev->op = op;
95	}	94	}
96		95
97	/** @}	96	/** @}
98	*/	97	*/
99		98