* libc/include/stdio.h (__SNLK): Define.
* libc/include/stdio_ext.h (FSETLOCKING_QUERY, FSETLOCKING_INTERNAL, FSETLOCKING_BYCALLER): Define. (__fsetlocking): Declare. * libc/stdio/Makefile.am: Build fsetlocking.c. * libc/stdio/Makefile.in: Regenerate. * libc/stdio/fsetlocking.c: New file. * libc/stdio/local.h (_newlib_flockfile_start): Make _flockfile call dependent on __SNLK flag. (_newlib_flockfile_exit, _newlib_flockfile_end): Ditto for _funlockfile calls. Define all locking macros as empty if __SINGLE_THREAD__. * libc/stdio/stdio.tex: Include fsetlocking.def.
This commit is contained in:
Yaakov Selkowitz
parent
f5ce72dffc
commit
6485fc66f2
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@ -1,3 +1,19 @@
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2014-12-15 Yaakov Selkowitz <yselkowi@redhat.com>
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* libc/include/stdio.h (__SNLK): Define.
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* libc/include/stdio_ext.h (FSETLOCKING_QUERY, FSETLOCKING_INTERNAL,
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FSETLOCKING_BYCALLER): Define.
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(__fsetlocking): Declare.
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* libc/stdio/Makefile.am: Build fsetlocking.c.
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* libc/stdio/Makefile.in: Regenerate.
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* libc/stdio/fsetlocking.c: New file.
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* libc/stdio/local.h (_newlib_flockfile_start): Make _flockfile
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call dependent on __SNLK flag.
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(_newlib_flockfile_exit, _newlib_flockfile_end): Ditto for
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_funlockfile calls.
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Define all locking macros as empty if __SINGLE_THREAD__.
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* libc/stdio/stdio.tex: Include fsetlocking.def.
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2014-12-15 Nick Hung <nick@andestech.com>
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* newlib/libc/include/machine/setjmp.h: Add FPU support.
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@ -83,6 +83,7 @@ typedef _fpos64_t fpos64_t;
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#define __SL64 0x8000 /* is 64-bit offset large file */
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/* _flags2 flags */
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#define __SNLK 0x0001 /* stdio functions do not lock streams themselves */
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#define __SWID 0x2000 /* true => stream orientation wide, false => byte, only valid if __SORD in _flags is true */
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/*
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@ -13,14 +13,18 @@
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#include <stdio.h>
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#define FSETLOCKING_QUERY 0
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#define FSETLOCKING_INTERNAL 1
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#define FSETLOCKING_BYCALLER 2
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_BEGIN_STD_C
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void _EXFUN(__fpurge,(FILE *));
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int _EXFUN(__fsetlocking,(FILE *, int));
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/* TODO:
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void _flushlbf (void);
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int __fsetlocking (FILE *__fp, int __type);
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*/
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#ifdef __GNUC__
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@ -146,6 +146,7 @@ ELIX_4_SOURCES = \
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fpurge.c \
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fputwc.c \
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fputws.c \
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fsetlocking.c \
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funopen.c \
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fwide.c \
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fwprintf.c \
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@ -357,6 +358,7 @@ CHEWOUT_FILES = \
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fread.def \
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freopen.def \
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fseek.def \
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fsetlocking.def \
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fsetpos.def \
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ftell.def \
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funopen.def \
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@ -433,6 +435,7 @@ $(lpfx)fputws.$(oext): local.h fvwrite.h
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$(lpfx)fread.$(oext): local.h
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$(lpfx)freopen.$(oext): local.h
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$(lpfx)fseek.$(oext): local.h
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$(lpfx)fsetlocking.$(oext): local.h
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$(lpfx)ftell.$(oext): local.h
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$(lpfx)funopen.$(oext): local.h
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$(lpfx)fvwrite.$(oext): local.h fvwrite.h
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@ -143,6 +143,7 @@ am__objects_2 = $(am__objects_1) lib_a-clearerr.$(OBJEXT) \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fpurge.$(OBJEXT) \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fputwc.$(OBJEXT) \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fputws.$(OBJEXT) \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fsetlocking.$(OBJEXT) \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-funopen.$(OBJEXT) \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fwide.$(OBJEXT) \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fwprintf.$(OBJEXT) \
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@ -206,6 +207,7 @@ am__objects_8 = $(am__objects_7) clearerr.lo fclose.lo fdopen.lo \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fpurge.lo \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fputwc.lo \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fputws.lo \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fsetlocking.lo \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ funopen.lo \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fwide.lo \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fwprintf.lo \
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@ -514,6 +516,7 @@ GENERAL_SOURCES = \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fpurge.c \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fputwc.c \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fputws.c \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fsetlocking.c \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ funopen.c \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fwide.c \
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@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fwprintf.c \
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@ -631,6 +634,7 @@ CHEWOUT_FILES = \
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fread.def \
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freopen.def \
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fseek.def \
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fsetlocking.def \
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fsetpos.def \
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ftell.def \
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funopen.def \
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@ -1355,6 +1359,12 @@ lib_a-fputws.o: fputws.c
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lib_a-fputws.obj: fputws.c
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$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fputws.obj `if test -f 'fputws.c'; then $(CYGPATH_W) 'fputws.c'; else $(CYGPATH_W) '$(srcdir)/fputws.c'; fi`
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lib_a-fsetlocking.o: fsetlocking.c
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$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fsetlocking.o `test -f 'fsetlocking.c' || echo '$(srcdir)/'`fsetlocking.c
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lib_a-fsetlocking.obj: fsetlocking.c
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$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fsetlocking.obj `if test -f 'fsetlocking.c'; then $(CYGPATH_W) 'fsetlocking.c'; else $(CYGPATH_W) '$(srcdir)/fsetlocking.c'; fi`
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lib_a-funopen.o: funopen.c
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$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-funopen.o `test -f 'funopen.c' || echo '$(srcdir)/'`funopen.c
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@ -1772,6 +1782,7 @@ $(lpfx)fputws.$(oext): local.h fvwrite.h
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$(lpfx)fread.$(oext): local.h
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$(lpfx)freopen.$(oext): local.h
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$(lpfx)fseek.$(oext): local.h
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$(lpfx)fsetlocking.$(oext): local.h
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$(lpfx)ftell.$(oext): local.h
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$(lpfx)funopen.$(oext): local.h
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$(lpfx)fvwrite.$(oext): local.h fvwrite.h
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@ -0,0 +1,90 @@
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/*
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* Copyright (c) 2014 Red Hat, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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FUNCTION
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<<__fsetlocking>>---set or query locking mode on FILE stream
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INDEX
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__fsetlocking
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ANSI_SYNOPSIS
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#include <stdio.h>
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#include <stdio_ext.h>
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int __fsetlocking(FILE *<[fp]>, int <[type]>);
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DESCRIPTION
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This function sets how the stdio functions handle locking of FILE <[fp]>.
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The following values describe <[type]>:
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<<FSETLOCKING_INTERNAL>> is the default state, where stdio functions
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automatically lock and unlock the stream.
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<<FSETLOCKING_BYCALLER>> means that automatic locking in stdio functions
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is disabled. Applications which set this take all responsibility for file
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locking themselves.
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<<FSETLOCKING_QUERY>> returns the current locking mode without changing it.
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RETURNS
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<<__fsetlocking>> returns the current locking mode of <[fp]>.
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PORTABILITY
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This function originates from Solaris and is also provided by GNU libc.
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No supporting OS subroutines are required.
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*/
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#ifndef __rtems__
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#include <_ansi.h>
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#include <stdio.h>
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#include <stdio_ext.h>
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#include "local.h"
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int
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_DEFUN(__fsetlocking, (fp, type),
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FILE * fp _AND
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int type)
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{
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int result;
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CHECK_INIT(_REENT, fp);
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result = (fp->_flags2 & __SNLK) ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL;
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switch (type)
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{
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case FSETLOCKING_BYCALLER:
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fp->_flags2 |= __SNLK;
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break;
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case FSETLOCKING_INTERNAL:
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fp->_flags2 &= ~__SNLK;
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break;
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case FSETLOCKING_QUERY:
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default:
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break;
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}
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return result;
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}
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#endif /* __rtems__ */
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@ -68,15 +68,18 @@
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{ \
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int __oldfpcancel; \
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pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &__oldfpcancel); \
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if (!(_fp->_flags2 & __SNLK)) \
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_flockfile (_fp)
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/* Exit from a stream oriented critical section prematurely: */
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# define _newlib_flockfile_exit(_fp) \
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if (!(_fp->_flags2 & __SNLK)) \
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_funlockfile (_fp); \
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pthread_setcancelstate (__oldfpcancel, &__oldfpcancel);
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/* End a stream oriented critical section: */
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# define _newlib_flockfile_end(_fp) \
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if (!(_fp->_flags2 & __SNLK)) \
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_funlockfile (_fp); \
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pthread_setcancelstate (__oldfpcancel, &__oldfpcancel); \
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}
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@ -99,16 +102,19 @@
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pthread_setcancelstate (__oldsfpcancel, &__oldsfpcancel); \
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}
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#else /* !_STDIO_WITH_THREAD_CANCELLATION_SUPPORT */
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#elif !defined(__SINGLE_THREAD__) /* !_STDIO_WITH_THREAD_CANCELLATION_SUPPORT */
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# define _newlib_flockfile_start(_fp) \
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{ \
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if (!(_fp->_flags2 & __SNLK)) \
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_flockfile (_fp)
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# define _newlib_flockfile_exit(_fp) \
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if (!(_fp->_flags2 & __SNLK)) \
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_funlockfile(_fp); \
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# define _newlib_flockfile_end(_fp) \
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if (!(_fp->_flags2 & __SNLK)) \
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_funlockfile(_fp); \
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}
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@ -123,6 +129,15 @@
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__sfp_lock_release (); \
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}
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#else /* __SINGLE_THREAD__ */
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# define _newlib_flockfile_start(_fp)
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# define _newlib_flockfile_exit(_fp)
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# define _newlib_flockfile_end(_fp)
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# define _newlib_sfp_lock_start()
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# define _newlib_sfp_lock_exit()
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# define _newlib_sfp_lock_end()
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#endif /* _STDIO_WITH_THREAD_CANCELLATION_SUPPORT */
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extern u_char *_EXFUN(__sccl, (char *, u_char *fmt));
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@ -177,6 +177,9 @@ structure.
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@page
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@include stdio/fseek.def
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@page
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@include stdio/fsetlocking.def
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@page
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@include stdio/fsetpos.def
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