2002-05-09 03:11:22 +08:00
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/*
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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2020-01-29 02:54:53 +08:00
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* and/or other materials related to such
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2002-05-09 03:11:22 +08:00
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/*
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FUNCTION
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<<getc_unlocked>>---non-thread-safe version of getc (macro)
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INDEX
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getc_unlocked
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2006-06-15 04:49:11 +08:00
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INDEX
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_getc_unlocked_r
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2002-05-09 03:11:22 +08:00
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2008-11-01 05:08:03 +08:00
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SYNOPSIS
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2002-05-09 03:11:22 +08:00
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#include <stdio.h>
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int getc_unlocked(FILE *<[fp]>);
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2006-06-15 04:49:11 +08:00
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#include <stdio.h>
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int _getc_unlocked_r(FILE *<[fp]>);
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2002-05-09 03:11:22 +08:00
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DESCRIPTION
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<<getc_unlocked>> is a non-thread-safe version of <<getc>> declared in
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<<stdio.h>>. <<getc_unlocked>> may only safely be used within a scope
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protected by flockfile() (or ftrylockfile()) and funlockfile(). These
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functions may safely be used in a multi-threaded program if and only
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if they are called while the invoking thread owns the ( FILE *)
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object, as is the case after a successful call to the flockfile() or
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ftrylockfile() functions. If threads are disabled, then
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<<getc_unlocked>> is equivalent to <<getc>>.
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2006-06-15 04:49:11 +08:00
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The <<_getc_unlocked_r>> function is simply the reentrant version of
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<<get_unlocked>> which passes an additional reentrancy structure pointer
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argument: <[ptr]>.
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2002-05-09 03:11:22 +08:00
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RETURNS
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See <<getc>>.
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PORTABILITY
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POSIX 1003.1 requires <<getc_unlocked>>. <<getc_unlocked>> may be
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implemented as a macro, so arguments should not have side-effects.
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Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
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<<lseek>>, <<read>>, <<sbrk>>, <<write>>. */
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "%W% (Berkeley) %G%";
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#endif /* LIBC_SCCS and not lint */
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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
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#include <_ansi.h>
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2002-05-09 03:11:22 +08:00
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#include <stdio.h>
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/*
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* A subroutine version of the macro getc_unlocked.
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*/
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#undef getc_unlocked
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int
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2017-12-04 11:43:30 +08:00
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_getc_unlocked_r (struct _reent *ptr,
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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
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register FILE *fp)
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2002-05-09 03:11:22 +08:00
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{
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2006-06-15 04:49:11 +08:00
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/* CHECK_INIT is called (eventually) by __srefill_r. */
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2002-05-09 03:11:22 +08:00
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2006-06-15 04:49:11 +08:00
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return __sgetc_r (ptr, fp);
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2002-05-09 03:11:22 +08:00
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}
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2006-06-15 04:49:11 +08:00
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#ifndef _REENT_ONLY
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int
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2017-12-04 11:43:30 +08:00
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getc_unlocked (register FILE *fp)
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2006-06-15 04:49:11 +08:00
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{
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return __sgetc_r (_REENT, fp);
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}
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#endif /* !_REENT_ONLY */
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