2002-05-09 03:11:22 +08:00
|
|
|
/*
|
|
|
|
|
* 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
|
|
|
|
|
<<getc_unlocked>>---non-thread-safe version of getc (macro)
|
|
|
|
|
|
|
|
|
|
INDEX
|
|
|
|
|
getc_unlocked
|
2006-06-15 04:49:11 +08:00
|
|
|
INDEX
|
|
|
|
|
_getc_unlocked_r
|
2002-05-09 03:11:22 +08:00
|
|
|
|
2008-11-01 05:08:03 +08:00
|
|
|
SYNOPSIS
|
2002-05-09 03:11:22 +08:00
|
|
|
#include <stdio.h>
|
|
|
|
|
int getc_unlocked(FILE *<[fp]>);
|
|
|
|
|
|
2006-06-15 04:49:11 +08:00
|
|
|
#include <stdio.h>
|
|
|
|
|
int _getc_unlocked_r(FILE *<[fp]>);
|
|
|
|
|
|
2002-05-09 03:11:22 +08:00
|
|
|
DESCRIPTION
|
|
|
|
|
<<getc_unlocked>> is a non-thread-safe version of <<getc>> declared in
|
|
|
|
|
<<stdio.h>>. <<getc_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
|
|
|
|
|
<<getc_unlocked>> is equivalent to <<getc>>.
|
|
|
|
|
|
2006-06-15 04:49:11 +08:00
|
|
|
The <<_getc_unlocked_r>> function is simply the reentrant version of
|
|
|
|
|
<<get_unlocked>> which passes an additional reentrancy structure pointer
|
|
|
|
|
argument: <[ptr]>.
|
|
|
|
|
|
2002-05-09 03:11:22 +08:00
|
|
|
RETURNS
|
|
|
|
|
See <<getc>>.
|
|
|
|
|
|
|
|
|
|
PORTABILITY
|
|
|
|
|
POSIX 1003.1 requires <<getc_unlocked>>. <<getc_unlocked>> may be
|
|
|
|
|
implemented as a macro, so arguments should not have side-effects.
|
|
|
|
|
|
|
|
|
|
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 */
|
|
|
|
|
|
2004-04-23 Artem B. Bityuckiy <abitytsky@softminecorp.com>
* libc/stdio/asprintf.c libc/stdio/clearerr.c,
libc/stdio/fclose.c libc/stdio/fcloseall.c libc/stdio/fdopen.c,
libc/stdio/feof.c libc/stdio/ferror.c libc/stdio/fflush.c,
libc/stdio/fgetc.c libc/stdio/fgetpos.c libc/stdio/fgets.c,
libc/stdio/fileno.c libc/stdio/findfp.c libc/stdio/fiprintf.c,
libc/stdio/flags.c libc/stdio/fopen.c libc/stdio/fprintf.c,
libc/stdio/fputc.c libc/stdio/fputs.c libc/stdio/fread.c,
libc/stdio/freopen.c libc/stdio/fscanf.c libc/stdio/fseek.c,
libc/stdio/fseeko.c libc/stdio/fsetpos.c libc/stdio/ftell.c,
libc/stdio/ftello.c libc/stdio/fvwrite.c libc/stdio/fwalk.c,
libc/stdio/fwrite.c libc/stdio/getc.c libc/stdio/getc_u.c,
libc/stdio/getchar.c libc/stdio/getchar_u.c,
libc/stdio/getdelim.c libc/stdio/getline.c libc/stdio/gets.c,
libc/stdio/getw.c libc/stdio/iprintf.c libc/stdio/local.h,
libc/stdio/makebuf.c libc/stdio/mktemp.c libc/stdio/perror.c,
libc/stdio/printf.c libc/stdio/putc.c libc/stdio/putc_u.c,
libc/stdio/putchar.c libc/stdio/putchar_u.c libc/stdio/puts.c,
libc/stdio/putw.c libc/stdio/refill.c libc/stdio/remove.c,
libc/stdio/rename.c libc/stdio/rewind.c libc/stdio/rget.c,
libc/stdio/scanf.c libc/stdio/setbuf.c libc/stdio/setbuffer.c,
libc/stdio/setlinebuf.c libc/stdio/setvbuf.c,
libc/stdio/siprintf.c libc/stdio/snprintf.c,
libc/stdio/sprintf.c libc/stdio/sscanf.c libc/stdio/stdio.c,
libc/stdio/tmpfile.c libc/stdio/tmpnam.c libc/stdio/ungetc.c,
libc/stdio/vasprintf.c libc/stdio/vfieeefp.h,
libc/stdio/vfprintf.c libc/stdio/vfscanf.c,
libc/stdio/vprintf.c libc/stdio/vscanf.c,
libc/stdio/vsnprintf.c libc/stdio/vsprintf.c,
libc/stdio/vsscanf.c libc/stdio/wbuf.c,
libc/stdio/wsetup.c: Perform minor formatting changes. Move
copyright notices to top of file, ensure that <_ansi.h> is
included, be consistent with open parentheses, use _DEFUN macro,
include "local.h" where needed, and remove various compiler
warnings.
2004-04-24 04:01:55 +08:00
|
|
|
#include <_ansi.h>
|
2002-05-09 03:11:22 +08:00
|
|
|
#include <stdio.h>
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
* A subroutine version of the macro getc_unlocked.
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
|
|
#undef getc_unlocked
|
|
|
|
|
|
|
|
|
|
int
|
2006-06-15 04:49:11 +08:00
|
|
|
_DEFUN(_getc_unlocked_r, (ptr, fp),
|
|
|
|
|
struct _reent *ptr _AND
|
2004-04-23 Artem B. Bityuckiy <abitytsky@softminecorp.com>
* libc/stdio/asprintf.c libc/stdio/clearerr.c,
libc/stdio/fclose.c libc/stdio/fcloseall.c libc/stdio/fdopen.c,
libc/stdio/feof.c libc/stdio/ferror.c libc/stdio/fflush.c,
libc/stdio/fgetc.c libc/stdio/fgetpos.c libc/stdio/fgets.c,
libc/stdio/fileno.c libc/stdio/findfp.c libc/stdio/fiprintf.c,
libc/stdio/flags.c libc/stdio/fopen.c libc/stdio/fprintf.c,
libc/stdio/fputc.c libc/stdio/fputs.c libc/stdio/fread.c,
libc/stdio/freopen.c libc/stdio/fscanf.c libc/stdio/fseek.c,
libc/stdio/fseeko.c libc/stdio/fsetpos.c libc/stdio/ftell.c,
libc/stdio/ftello.c libc/stdio/fvwrite.c libc/stdio/fwalk.c,
libc/stdio/fwrite.c libc/stdio/getc.c libc/stdio/getc_u.c,
libc/stdio/getchar.c libc/stdio/getchar_u.c,
libc/stdio/getdelim.c libc/stdio/getline.c libc/stdio/gets.c,
libc/stdio/getw.c libc/stdio/iprintf.c libc/stdio/local.h,
libc/stdio/makebuf.c libc/stdio/mktemp.c libc/stdio/perror.c,
libc/stdio/printf.c libc/stdio/putc.c libc/stdio/putc_u.c,
libc/stdio/putchar.c libc/stdio/putchar_u.c libc/stdio/puts.c,
libc/stdio/putw.c libc/stdio/refill.c libc/stdio/remove.c,
libc/stdio/rename.c libc/stdio/rewind.c libc/stdio/rget.c,
libc/stdio/scanf.c libc/stdio/setbuf.c libc/stdio/setbuffer.c,
libc/stdio/setlinebuf.c libc/stdio/setvbuf.c,
libc/stdio/siprintf.c libc/stdio/snprintf.c,
libc/stdio/sprintf.c libc/stdio/sscanf.c libc/stdio/stdio.c,
libc/stdio/tmpfile.c libc/stdio/tmpnam.c libc/stdio/ungetc.c,
libc/stdio/vasprintf.c libc/stdio/vfieeefp.h,
libc/stdio/vfprintf.c libc/stdio/vfscanf.c,
libc/stdio/vprintf.c libc/stdio/vscanf.c,
libc/stdio/vsnprintf.c libc/stdio/vsprintf.c,
libc/stdio/vsscanf.c libc/stdio/wbuf.c,
libc/stdio/wsetup.c: Perform minor formatting changes. Move
copyright notices to top of file, ensure that <_ansi.h> is
included, be consistent with open parentheses, use _DEFUN macro,
include "local.h" where needed, and remove various compiler
warnings.
2004-04-24 04:01:55 +08:00
|
|
|
register FILE *fp)
|
2002-05-09 03:11:22 +08:00
|
|
|
{
|
2006-06-15 04:49:11 +08:00
|
|
|
/* CHECK_INIT is called (eventually) by __srefill_r. */
|
2002-05-09 03:11:22 +08:00
|
|
|
|
2006-06-15 04:49:11 +08:00
|
|
|
return __sgetc_r (ptr, fp);
|
2002-05-09 03:11:22 +08:00
|
|
|
}
|
2006-06-15 04:49:11 +08:00
|
|
|
|
|
|
|
|
#ifndef _REENT_ONLY
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
_DEFUN(getc_unlocked, (fp),
|
|
|
|
|
register FILE *fp)
|
|
|
|
|
{
|
|
|
|
|
return __sgetc_r (_REENT, fp);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif /* !_REENT_ONLY */
|
