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| Rev | Author | Line No. | Line |
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| 510 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2005 Jakub Jermar |
| 510 | jermar | 3 | * All rights reserved. |
| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 1888 | jermar | 29 | /** @addtogroup genericconsole |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 510 | jermar | 35 | #include <console/chardev.h> |
| 36 | #include <synch/waitq.h> |
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| 37 | #include <synch/spinlock.h> |
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| 38 | |||
| 4091 | decky | 39 | /** Initialize input character device. |
| 511 | jermar | 40 | * |
| 4091 | decky | 41 | * @param indev Input character device. |
| 42 | * @param op Implementation of input character device operations. |
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| 43 | * |
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| 511 | jermar | 44 | */ |
| 4091 | decky | 45 | void indev_initialize(char *name, indev_t *indev, |
| 46 | indev_operations_t *op) |
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| 510 | jermar | 47 | { |
| 4091 | decky | 48 | indev->name = name; |
| 49 | waitq_initialize(&indev->wq); |
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| 50 | spinlock_initialize(&indev->lock, "indev"); |
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| 51 | indev->counter = 0; |
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| 52 | indev->index = 0; |
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| 53 | indev->op = op; |
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| 510 | jermar | 54 | } |
| 511 | jermar | 55 | |
| 56 | /** Push character read from input character device. |
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| 57 | * |
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| 4091 | decky | 58 | * @param indev Input character device. |
| 59 | * @param ch Character being pushed. |
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| 60 | * |
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| 511 | jermar | 61 | */ |
| 4214 | decky | 62 | void indev_push_character(indev_t *indev, wchar_t ch) |
| 511 | jermar | 63 | { |
| 4091 | decky | 64 | ASSERT(indev); |
| 65 | |||
| 66 | spinlock_lock(&indev->lock); |
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| 67 | if (indev->counter == INDEV_BUFLEN - 1) { |
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| 68 | /* Buffer full */ |
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| 69 | spinlock_unlock(&indev->lock); |
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| 70 | return; |
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| 511 | jermar | 71 | } |
| 990 | decky | 72 | |
| 4091 | decky | 73 | indev->counter++; |
| 74 | indev->buffer[indev->index++] = ch; |
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| 75 | |||
| 76 | /* Index modulo size of buffer */ |
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| 77 | indev->index = indev->index % INDEV_BUFLEN; |
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| 78 | waitq_wakeup(&indev->wq, WAKEUP_FIRST); |
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| 79 | spinlock_unlock(&indev->lock); |
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| 511 | jermar | 80 | } |
| 1702 | cejka | 81 | |
| 4091 | decky | 82 | /** Initialize output character device. |
| 83 | * |
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| 84 | * @param outdev Output character device. |
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| 85 | * @param op Implementation of output character device operations. |
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| 86 | * |
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| 87 | */ |
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| 88 | void outdev_initialize(char *name, outdev_t *outdev, |
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| 89 | outdev_operations_t *op) |
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| 90 | { |
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| 91 | outdev->name = name; |
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| 92 | spinlock_initialize(&outdev->lock, "outdev"); |
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| 93 | outdev->op = op; |
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| 94 | } |
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| 95 | |||
| 1888 | jermar | 96 | /** @} |
| 1702 | cejka | 97 | */ |