source: mainline/kernel/generic/include/console/console.h@ 465ac5e

Last change on this file since 465ac5e was 90dd8aee, checked in by Jiří Zárevúcky <zarevucky.jiri@…>, 8 months ago

Introduce a console lock to prevent line splitting in kernel output

It is a common occurrence to see broken lines on screen or in serial
output due to bad timing. This is an attempt to prevent that without
breaking anything.

It could be considered a stopgap solution, since the whole console
stack deserves a better/faster implementation.

  • Property mode set to 100644
File size: 2.5 KB
RevLine 
[2677758]1/*
[df4ed85]2 * Copyright (c) 2005 Jakub Jermar
[2677758]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
[174156fd]29/** @addtogroup kernel_generic_console
[b45c443]30 * @{
31 */
32/** @file
33 */
34
[06e1e95]35#ifndef KERN_CONSOLE_H_
36#define KERN_CONSOLE_H_
[2677758]37
[d99c1d2]38#include <typedefs.h>
[b3b7e14a]39#include <print.h>
[b3f8fb7]40#include <console/chardev.h>
[91db0280]41#include <synch/spinlock.h>
[2677758]42
[b3b7e14a]43#define PAGING(counter, increment, before, after) \
44 do { \
45 (counter) += (increment); \
46 if ((counter) > 23) { \
47 before; \
48 printf(" -- Press any key to continue -- "); \
49 indev_pop_character(stdin); \
50 after; \
51 printf("\n"); \
52 (counter) = 0; \
53 } \
54 } while (0)
55
[ac8e7a9]56extern indev_t *stdin;
57extern outdev_t *stdout;
[691eb52]58
[28a5ebd]59extern void early_putuchar(char32_t);
[da52547]60
[44b7783]61extern indev_t *stdin_wire(void);
[b9c7425]62extern void stdout_wire(outdev_t *outdev);
[411b6a6]63extern void console_init(void);
64
[6fa9a99d]65extern void kio_init(void);
66extern void kio_update(void *);
[91db0280]67extern void kio_flush(void);
[28a5ebd]68extern void kio_push_char(const char32_t);
[91db0280]69SPINLOCK_EXTERN(kio_lock);
[82b71ef1]70
[5a5269d]71extern sys_errno_t sys_kio(int cmd, uspace_addr_t buf, size_t size);
[2677758]72
[516ff92]73extern void grab_console(void);
74extern void release_console(void);
75
[f6ab787]76extern sysarg_t sys_debug_console(void);
[8015eeec]77
[90dd8aee]78extern void console_lock(void);
79extern void console_unlock(void);
80
[06e1e95]81#endif /* KERN_CONSOLE_H_ */
[b45c443]82
[06e1e95]83/** @}
[b45c443]84 */
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