source: mainline/kernel/generic/src/printf/vprintf.c@ 5df1963

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 5df1963 was 712c4ba, checked in by Martin Decky <martin@…>, 14 years ago

avoid spinlocks to be taken in the direct code path to physically outputing kconsole characters to the framebuffer (this fixes ticket #243)
the spinlock in printf() (kernel) was sacrificed, this might lead potentially to scrambled kconsole output
the hack of ignoring spinlocks whose names start with "*" in the livelock detector can be removed

  • Property mode set to 100644
File size: 2.4 KB
Line 
1/*
2 * Copyright (c) 2006 Josef Cejka
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
29/** @addtogroup generic
30 * @{
31 */
32/** @file
33 */
34
35#include <print.h>
36#include <printf/printf_core.h>
37#include <putchar.h>
38#include <synch/spinlock.h>
39#include <arch/asm.h>
40#include <typedefs.h>
41#include <typedefs.h>
42#include <str.h>
43
44static int vprintf_str_write(const char *str, size_t size, void *data)
45{
46 size_t offset = 0;
47 size_t chars = 0;
48
49 while (offset < size) {
50 putchar(str_decode(str, &offset, size));
51 chars++;
52 }
53
54 return chars;
55}
56
57static int vprintf_wstr_write(const wchar_t *str, size_t size, void *data)
58{
59 size_t offset = 0;
60 size_t chars = 0;
61
62 while (offset < size) {
63 putchar(str[chars]);
64 chars++;
65 offset += sizeof(wchar_t);
66 }
67
68 return chars;
69}
70
71int puts(const char *str)
72{
73 size_t offset = 0;
74 size_t chars = 0;
75 wchar_t uc;
76
77 while ((uc = str_decode(str, &offset, STR_NO_LIMIT)) != 0) {
78 putchar(uc);
79 chars++;
80 }
81
82 return chars;
83}
84
85int vprintf(const char *fmt, va_list ap)
86{
87 printf_spec_t ps = {
88 vprintf_str_write,
89 vprintf_wstr_write,
90 NULL
91 };
92
93 return printf_core(fmt, &ps, ap);
94}
95
96/** @}
97 */
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