1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/*
* Copyright (c) 1997-1999 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
#include <unistd.h>
#include <oskit/dev/dev.h>
#include <oskit/c/environment.h>
#include <oskit/dev/osenv_intr.h>
#include "fd.h"
#include "posix.h"
int
write(int fd, const void *buf, size_t size)
{
oskit_u32_t retval;
oskit_error_t rc;
#ifdef THREAD_SAFE
int enabled = 0;
/*
* Sigh. Don't have a good solution for protecting against
* printf out of interrupt handlers.
*/
if (fd == STDOUT_FILENO) {
if (!posixlib_osenv_intr_iface)
posixlib_osenv_intr_init_iface();
if (posixlib_osenv_intr_iface &&
((enabled =
oskit_osenv_intr_enabled(posixlib_osenv_intr_iface))))
oskit_osenv_intr_disable(posixlib_osenv_intr_iface);
}
#endif
FD_CHECK_STREAM(fd);
FD_ACCESS_LOCK(fd, FD_WRITE);
rc = oskit_stream_write(fd_array[fd].stream, buf, size, &retval);
FD_ACCESS_UNLOCK(fd, FD_WRITE);
#ifdef THREAD_SAFE
if (fd == STDOUT_FILENO) {
if (posixlib_osenv_intr_iface && enabled)
oskit_osenv_intr_enable(posixlib_osenv_intr_iface);
}
#endif
if (rc) {
errno = rc;
return -1;
}
return retval;
}
|
