xref: /illumos-gate/usr/src/lib/libc/port/stdio/putc.c (revision 20a7641f9918de8574b8b3b47dbe35c4bfc78df1)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1988 AT&T	*/
28 /*	  All Rights Reserved	*/
29 
30 #pragma weak _putc_unlocked = putc_unlocked
31 
32 #include "lint.h"
33 #include "file64.h"
34 #include "mtlib.h"
35 #include <sys/types.h>
36 #include <stdio.h>
37 #include <thread.h>
38 #include <synch.h>
39 #include "stdiom.h"
40 #include "mse.h"
41 
42 #undef putc
43 #undef putc_unlocked
44 
45 int
46 putc(int ch, FILE *iop)
47 {
48 	rmutex_t *lk;
49 	int ret;
50 
51 	FLOCKFILE(lk, iop);
52 	ret = putc_unlocked(ch, iop);
53 	FUNLOCKFILE(lk);
54 	return (ret);
55 }
56 
57 int
58 putc_unlocked(int ch, FILE *iop)
59 {
60 	_SET_ORIENTATION_BYTE(iop);
61 
62 	if (--iop->_cnt < 0)
63 		return (__flsbuf((unsigned char) ch, iop));
64 	else
65 		return (*iop->_ptr++ = (unsigned char)ch);
66 }
67 
68 int
69 _putc_internal(int ch, FILE *iop)
70 {
71 	if (--iop->_cnt < 0)
72 		return (__flsbuf((unsigned char) ch, iop));
73 	else
74 		return (*iop->_ptr++ = (unsigned char)ch);
75 }
76