| /* |
| * Copyright (c) 1990 The Regents of the University of California. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms are permitted |
| * provided that the above copyright notice and this paragraph are |
| * duplicated in all such forms and that any documentation, |
| * advertising materials, and other materials related to such |
| * distribution and use acknowledge that the software was developed |
| * by the University of California, Berkeley. The name of the |
| * University may not be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| */ |
| |
| /* |
| FUNCTION |
| <<putchar_unlocked>>---non-thread-safe version of putchar (macro) |
| |
| INDEX |
| putchar_unlocked |
| |
| SYNOPSIS |
| #include <stdio.h> |
| int putchar_unlocked(int <[ch]>); |
| |
| DESCRIPTION |
| <<putchar_unlocked>> is a non-thread-safe version of <<putchar>> |
| declared in <<stdio.h>>. <<putchar_unlocked>> may only safely be used |
| within a scope protected by flockfile() (or ftrylockfile()) and |
| funlockfile(). These functions may safely be used in a multi-threaded |
| program if and only if they are called while the invoking thread owns |
| the ( FILE *) object, as is the case after a successful call to the |
| flockfile() or ftrylockfile() functions. If threads are disabled, |
| then <<putchar_unlocked>> is equivalent to <<putchar>>. |
| |
| RETURNS |
| See <<putchar>>. |
| |
| PORTABILITY |
| POSIX 1003.1 requires <<putchar_unlocked>>. <<putchar_unlocked>> may |
| be implemented as a macro. |
| |
| Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, |
| <<lseek>>, <<read>>, <<sbrk>>, <<write>>. */ |
| |
| #if defined(LIBC_SCCS) && !defined(lint) |
| static char sccsid[] = "%W% (Berkeley) %G%"; |
| #endif /* LIBC_SCCS and not lint */ |
| |
| /* |
| * A subroutine version of the macro putchar_unlocked. |
| */ |
| |
| #include <_ansi.h> |
| #include <reent.h> |
| #include <stdio.h> |
| |
| #undef putchar_unlocked |
| |
| int |
| _DEFUN(_putchar_unlocked_r, (ptr, c), |
| struct _reent *ptr _AND |
| int c) |
| { |
| return putc_unlocked (c, _stdout_r (ptr)); |
| } |
| |
| #ifndef _REENT_ONLY |
| |
| int |
| _DEFUN(putchar_unlocked, (c), |
| int c) |
| { |
| /* CHECK_INIT is (eventually) called by __swbuf. */ |
| |
| return _putchar_unlocked_r (_REENT, c); |
| } |
| |
| #endif |