Subversion Repositories HelenOS

Rev

Rev 3149 | Rev 4347 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
510 jermar 1 
/*
2071 jermar 2 
 * Copyright (c) 2005 Jakub Jermar
510 jermar 3 
 * All rights reserved.
4 
 *
5 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
7 
 * are met:
8 
 *
9 
 * - Redistributions of source code must retain the above copyright
10 
 *   notice, this list of conditions and the following disclaimer.
11 
 * - Redistributions in binary form must reproduce the above copyright
12 
 *   notice, this list of conditions and the following disclaimer in the
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
15 
 *   derived from this software without specific prior written permission.
16 
 *
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
19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
 */
28 
 
1888 jermar 29 
/** @addtogroup genericconsole
1702 cejka 30 
 * @{
31 
 */
32 
/** @file
33 
 */
34 
 
510 jermar 35 
#include <console/chardev.h>
511 jermar 36 
#include <putchar.h>
510 jermar 37 
#include <synch/waitq.h>
38 
#include <synch/spinlock.h>
39 
 
4346 svoboda 40 
/** Initialize input character device.
511 jermar 41 
 *
4346 svoboda 42 
 * @param indev Input character device.
43 
 * @param op    Implementation of input character device operations.
44 
 *
511 jermar 45 
 */
4346 svoboda 46 
void indev_initialize(char *name, indev_t *indev,
47 
    indev_operations_t *op)
510 jermar 48 
{
4346 svoboda 49 
    indev->name = name;
50 
    waitq_initialize(&indev->wq);
51 
    spinlock_initialize(&indev->lock, "indev");
52 
    indev->counter = 0;
53 
    indev->index = 0;
54 
    indev->op = op;
510 jermar 55 
}
511 jermar 56 
 
57 
/** Push character read from input character device.
58 
 *
4346 svoboda 59 
 * @param indev Input character device.
60 
 * @param ch    Character being pushed.
61 
 *
511 jermar 62 
 */
4346 svoboda 63 
void indev_push_character(indev_t *indev, uint8_t ch)
511 jermar 64 
{
4346 svoboda 65 
    ASSERT(indev);
66 
 
67 
    spinlock_lock(&indev->lock);
68 
    if (indev->counter == INDEV_BUFLEN - 1) {
69 
        /* Buffer full */
70 
        spinlock_unlock(&indev->lock);
71 
        return;
511 jermar 72 
    }
990 decky 73 
 
4346 svoboda 74 
    indev->counter++;
75 
    indev->buffer[indev->index++] = ch;
76 
 
77 
    /* Index modulo size of buffer */
78 
    indev->index = indev->index % INDEV_BUFLEN;
79 
    waitq_wakeup(&indev->wq, WAKEUP_FIRST);
80 
    spinlock_unlock(&indev->lock);
511 jermar 81 
}
1702 cejka 82 
 
4346 svoboda 83 
/** Initialize output character device.
84 
 *
85 
 * @param outdev Output character device.
86 
 * @param op     Implementation of output character device operations.
87 
 *
88 
 */
89 
void outdev_initialize(char *name, outdev_t *outdev,
90 
    outdev_operations_t *op)
91 
{
92 
    outdev->name = name;
93 
    spinlock_initialize(&outdev->lock, "outdev");
94 
    outdev->op = op;
95 
}
96 
 
1888 jermar 97 
/** @}
1702 cejka 98 
 */