xref: /illumos-gate/usr/src/lib/libc/port/stdio/putc.c (revision 7c478bd9)
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, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
28 
29 /*	Copyright (c) 1988 AT&T	*/
30 /*	  All Rights Reserved  	*/
31 
32 
33 #pragma weak putc_unlocked = _putc_unlocked
34 
35 #include "synonyms.h"
36 #include "file64.h"
37 #include "mtlib.h"
38 #include <sys/types.h>
39 #include <stdio.h>
40 #include <thread.h>
41 #include <synch.h>
42 #include "stdiom.h"
43 #include "mse.h"
44 
45 #undef putc
46 
47 #undef putc_unlocked
48 
49 int
50 putc(int ch, FILE *iop)
51 {
52 	rmutex_t *lk;
53 	int ret;
54 
55 	FLOCKFILE(lk, iop);
56 
57 	_SET_ORIENTATION_BYTE(iop);
58 
59 	if (--iop->_cnt < 0)
60 		ret = __flsbuf((unsigned char) ch, iop);
61 	else {
62 		(*iop->_ptr++) = (unsigned char)ch;
63 		ret = (unsigned char)ch;
64 	}
65 	FUNLOCKFILE(lk);
66 	return (ret);
67 }
68 
69 
70 int
71 _putc_unlocked(int ch, FILE *iop)
72 {
73 	if (--iop->_cnt < 0)
74 		return (__flsbuf((unsigned char) ch, iop));
75 	else
76 		return (*iop->_ptr++ = (unsigned char)ch);
77 }
78