WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/console/console.c


/*
 * Copyright (C) 2003 Josef Cejka
 * 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.
 */
 
#include <console/console.h>
#include <console/chardev.h>
#include <synch/waitq.h>
#include <synch/spinlock.h>
#include <arch/types.h>
#include <typedefs.h>
#include <arch.h>
 
/** Standard input character device. */
chardev_t *stdin = NULL;
chardev_t *stdout = NULL;
 
/** Get string from character device.
 *
 * Read characters from character device until first occurrence
 * of newline character.
 *
 * @param chardev Character device.
 * @param buf Buffer where to store string terminated by '\0'.
 * @param len Size of the buffer.
 *
 * @return Number of characters read.
 */
count_t gets(chardev_t *chardev, char *buf, size_t buflen)
{
    index_t index = 0;
    char ch;
 
    while (index < buflen) {
        ch = getc(chardev);
        if (ch == '\n') { /* end of string => write 0, return */
            buf[index] = '\0';
            return (count_t) index;
        }
        buf[index++] = ch;
    }
    return (count_t) index;
}
 
/** Get character from character device.
 *
 * @param chardev Character device.
 *
 * @return Character read.
 */
__u8 getc(chardev_t *chardev)
{
    __u8 ch;
    ipl_t ipl;
 
    waitq_sleep(&chardev->wq);
    ipl = interrupts_disable();
    spinlock_lock(&chardev->lock);
    ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN];
    chardev->counter--;
    spinlock_unlock(&chardev->lock);
    interrupts_restore(ipl);
 
    chardev->op->resume(chardev);
 
    return ch;
}
 
void putchar(char c)
{
    stdout->op->write(stdout, c);
}
 

Rev 534	Rev 575
1	/*	1	/*
2	* Copyright (C) 2003 Josef Cejka	2	* Copyright (C) 2003 Josef Cejka
3	* Copyright (C) 2005 Jakub Jermar	3	* Copyright (C) 2005 Jakub Jermar
4	* All rights reserved.	4	* All rights reserved.
5	*	5	*
6	* Redistribution and use in source and binary forms, with or without	6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions	7	* modification, are permitted provided that the following conditions
8	* are met:	8	* are met:
9	*	9	*
10	* - Redistributions of source code must retain the above copyright	10	* - Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.	11	* notice, this list of conditions and the following disclaimer.
12	* - Redistributions in binary form must reproduce the above copyright	12	* - Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the	13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.	14	* documentation and/or other materials provided with the distribution.
15	* - The name of the author may not be used to endorse or promote products	15	* - The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.	16	* derived from this software without specific prior written permission.
17	*	17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	28	*/
29		29
30	#include <console/console.h>	30	#include <console/console.h>
31	#include <console/chardev.h>	31	#include <console/chardev.h>
32	#include <synch/waitq.h>	32	#include <synch/waitq.h>
33	#include <synch/spinlock.h>	33	#include <synch/spinlock.h>
34	#include <arch/types.h>	34	#include <arch/types.h>
35	#include <typedefs.h>	35	#include <typedefs.h>
36	#include <arch.h>	36	#include <arch.h>
37		37
38	/** Standard input character device. */	38	/** Standard input character device. */
39	chardev_t *stdin = NULL;	39	chardev_t *stdin = NULL;
-		40	chardev_t *stdout = NULL;
40		41
41	/** Get string from character device.	42	/** Get string from character device.
42	*	43	*
43	* Read characters from character device until first occurrence	44	* Read characters from character device until first occurrence
44	* of newline character.	45	* of newline character.
45	*	46	*
46	* @param chardev Character device.	47	* @param chardev Character device.
47	* @param buf Buffer where to store string terminated by '\0'.	48	* @param buf Buffer where to store string terminated by '\0'.
48	* @param len Size of the buffer.	49	* @param len Size of the buffer.
49	*	50	*
50	* @return Number of characters read.	51	* @return Number of characters read.
51	*/	52	*/
52	count_t gets(chardev_t chardev, char buf, size_t buflen)	53	count_t gets(chardev_t chardev, char buf, size_t buflen)
53	{	54	{
54	index_t index = 0;	55	index_t index = 0;
55	char ch;	56	char ch;
56		57
57	while (index < buflen) {	58	while (index < buflen) {
58	ch = getc(chardev);	59	ch = getc(chardev);
59	if (ch == '\n') { /* end of string => write 0, return */	60	if (ch == '\n') { /* end of string => write 0, return */
60	buf[index] = '\0';	61	buf[index] = '\0';
61	return (count_t) index;	62	return (count_t) index;
62	}	63	}
63	buf[index++] = ch;	64	buf[index++] = ch;
64	}	65	}
65	return (count_t) index;	66	return (count_t) index;
66	}	67	}
67		68
68	/** Get character from character device.	69	/** Get character from character device.
69	*	70	*
70	* @param chardev Character device.	71	* @param chardev Character device.
71	*	72	*
72	* @return Character read.	73	* @return Character read.
73	*/	74	*/
74	__u8 getc(chardev_t *chardev)	75	__u8 getc(chardev_t *chardev)
75	{	76	{
76	__u8 ch;	77	__u8 ch;
77	ipl_t ipl;	78	ipl_t ipl;
78		79
79	waitq_sleep(&chardev->wq);	80	waitq_sleep(&chardev->wq);
80	ipl = interrupts_disable();	81	ipl = interrupts_disable();
81	spinlock_lock(&chardev->lock);	82	spinlock_lock(&chardev->lock);
82	ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN];	83	ch = chardev->buffer[(chardev->index - chardev->counter) % CHARDEV_BUFLEN];
83	chardev->counter--;	84	chardev->counter--;
84	spinlock_unlock(&chardev->lock);	85	spinlock_unlock(&chardev->lock);
85	interrupts_restore(ipl);	86	interrupts_restore(ipl);
86		87
87	chardev->op->resume();	88	chardev->op->resume(chardev);
88		89
89	return ch;	90	return ch;
90	}	91	}
-		92
-		93	void putchar(char c)
-		94	{
-		95	stdout->op->write(stdout, c);
-		96	}
91		97

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/console/console.c – Rev 534 → 575