Subversion Repositories HelenOS

Rev

Rev 2229 | Rev 2479 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1234 cejka 1
/*
2071 jermar 2
 * Copyright (c) 2006 Josef Cejka
1234 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
 
1866 jermar 29
/** @addtogroup libc
1653 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
1234 cejka 35
#include <stdarg.h>
36
#include <stdio.h>
37
#include <unistd.h>
38
#include <io/printf_core.h>
2230 jermar 39
#include <futex.h>
40
#include <async.h>
1234 cejka 41
 
2230 jermar 42
static atomic_t printf_futex = FUTEX_INITIALIZER;
43
 
2209 decky 44
static int vprintf_write(const char *str, size_t count, void *unused)
1234 cejka 45
{
46
    return write(1, str, count);
47
}
48
 
1623 cejka 49
/** Print formatted text.
50
 * @param fmt   format string
51
 * @param ap    format parameters
52
 * \see For more details about format string see printf_core.
53
 */
1234 cejka 54
int vprintf(const char *fmt, va_list ap)
55
{
2230 jermar 56
    struct printf_spec ps = {
57
        (int (*)(void *, size_t, void *)) vprintf_write,
58
         NULL
59
    };
60
    /*
61
     * Prevent other threads to execute printf_core()
62
     */
63
    futex_down(&printf_futex);
64
    /*
65
     * Prevent other pseudo threads of the same thread
66
     * to execute printf_core()
67
     */
68
    async_serialize_start();
2209 decky 69
    int ret = printf_core(fmt, &ps, ap);
2230 jermar 70
    async_serialize_end();
71
    futex_up(&printf_futex);
2209 decky 72
    return ret;
1234 cejka 73
}
74
 
1866 jermar 75
/** @}
1653 cejka 76
 */