2001-08-24 03:20:56 +00:00
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/* Thread package specific definitions of stream lock type. Generic version.
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2023-01-06 21:08:04 +00:00
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Copyright (C) 2000-2023 Free Software Foundation, Inc.
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2000-03-10 08:46:33 +00:00
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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2001-07-06 04:58:11 +00:00
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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2000-03-10 08:46:33 +00:00
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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2001-07-06 04:58:11 +00:00
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Lesser General Public License for more details.
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2000-03-10 08:46:33 +00:00
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2001-07-06 04:58:11 +00:00
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You should have received a copy of the GNU Lesser General Public
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2012-02-09 23:18:22 +00:00
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License along with the GNU C Library; if not, see
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Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 05:40:42 +00:00
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<https://www.gnu.org/licenses/>. */
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2000-03-10 08:46:33 +00:00
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2015-09-04 16:21:14 +00:00
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#ifndef _STDIO_LOCK_H
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#define _STDIO_LOCK_H 1
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2000-03-10 08:46:33 +00:00
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2015-09-08 21:11:03 +00:00
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#include <libc-lock.h>
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2000-03-10 08:46:33 +00:00
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2001-08-23 06:03:42 +00:00
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__libc_lock_define_recursive (typedef, _IO_lock_t)
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Remove _IO_MTSAFE_IO from public headers.
_IO_MTSAFE_IO controls whether stdio is *built* with support for
multithreading. In the distant past it might also have worked as a
feature selection macro, allowing library *users* to select
thread-safe or lock-free stdio at application build time, I haven't
done the archaeology. Nowadays, defining _IO_MTSAFE_IO while using
the installed headers, or in _ISOMAC mode, will cause libio.h to throw
syntax errors.
This patch removes _IO_MTSAFE_IO from the public headers
(specifically, from libio/libio.h). The most important thing it
controlled in there was whether libio.h defines _IO_lock_t itself or
expects stdio-lock.h to have done it, and we do still need a
inter-header communication macro for that, because stdio-lock.h can
only define _IO_lock_t as a typedef. I've invented
_IO_lock_t_defined, which is defined by both versions of stdio-lock.h.
_IO_MTSAFE_IO also controlled the definitions of a handful of macros
that _might_ count as part of the public libio.h interface. They are
now unconditionally given their non-_IO_MTSAFE_IO definition in
libio/libio.h, and include/libio.h redefines them with the
_IO_MTSAFE_IO definition. This should minimize the odds of breaking
old software that actually uses those macros.
I suspect that this entire mechanism is vestigial, and that glibc
won't build anymore if you *don't* define _IO_MTSAFE_IO, but that's
another patchset. The bulk of libio.h is internal-use-only stuff that
no longer makes sense to expose (libstdc++ gave up on making a FILE
the same object as a C++ filebuf *decades* ago) but that, too, is
another patchset.
* libio/libio.h: Condition dummy definition of _IO_lock_t on
_IO_lock_t_defined, not _IO_MTSAFE_IO. Unconditionally use the
non-_IO_MTSAFE_IO definitions for _IO_peekc, _IO_flockfile,
_IO_funlockfile, and _IO_ftrylockfile. Only define
_IO_cleanup_region_start and _IO_cleanup_region_end if not
already defined.
* include/libio.h: If _IO_MTSAFE_IO is defined, redefine
_IO_peekc, _IO_flockfile, _IO_funlockfile, and _IO_ftrylockfile
appropriately.
* sysdeps/generic/stdio-lock.h, sysdeps/nptl/stdio-lock.h:
Define _IO_lock_t_defined after defining _IO_lock_t.
2017-03-01 13:17:07 +00:00
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#define _IO_lock_t_defined 1
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2000-03-10 08:46:33 +00:00
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/* We need recursive (counting) mutexes. */
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2001-08-24 03:20:56 +00:00
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#ifdef _LIBC_LOCK_RECURSIVE_INITIALIZER
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# define _IO_lock_initializer _LIBC_LOCK_RECURSIVE_INITIALIZER
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#elif _IO_MTSAFE_IO
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#error libio needs recursive mutexes for _IO_MTSAFE_IO
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#endif
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2000-03-10 08:46:33 +00:00
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2001-08-23 06:03:42 +00:00
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#define _IO_lock_init(_name) __libc_lock_init_recursive (_name)
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#define _IO_lock_fini(_name) __libc_lock_fini_recursive (_name)
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#define _IO_lock_lock(_name) __libc_lock_lock_recursive (_name)
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2002-12-08 03:13:06 +00:00
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#define _IO_lock_trylock(_name) __libc_lock_trylock_recursive (_name)
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2001-08-23 06:03:42 +00:00
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#define _IO_lock_unlock(_name) __libc_lock_unlock_recursive (_name)
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2000-03-10 08:46:33 +00:00
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#define _IO_cleanup_region_start(_fct, _fp) \
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2001-08-24 03:20:56 +00:00
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__libc_cleanup_region_start (((_fp)->_flags & _IO_USER_LOCK) == 0, _fct, _fp)
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2001-07-24 01:33:57 +00:00
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#define _IO_cleanup_region_start_noarg(_fct) \
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2001-08-24 03:20:56 +00:00
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__libc_cleanup_region_start (1, _fct, NULL)
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#define _IO_cleanup_region_end(_doit) \
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__libc_cleanup_region_end (_doit)
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2000-03-10 08:46:33 +00:00
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2014-11-24 09:33:45 +00:00
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#if defined _LIBC && IS_IN (libc)
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2015-12-22 13:39:19 +00:00
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# ifdef __EXCEPTIONS
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Update.
2003-08-29 Jakub Jelinek <jakub@redhat.com>
* libio/Makefile: Compile fputc.c, fputwc.c, freopen64.c, freopen.c,
fseek.c, fseeko64.c, fseeko.c, ftello64.c, ftello.c, fwide.c, getc.c,
getchar.c, getwc.c, getwchar.c, iofclose.c, iofflush.c, iofgetpos64.c,
iofgetpos.c, iofgets.c, iofgetws.c, iofputs.c, iofputws.c, iofread.c,
iofsetpos64.c, iofsetpos.c, ioftell.c, iofwrite.c, iogetdelim.c,
iogetline.c, iogets.c, iogetwline.c, ioputs.c, ioseekoff.c,
ioseekpos.c, iosetbuffer.c, iosetvbuf.c, ioungetc.c, ioungetwc.c,
oldfileops.c, oldiofclose.c, oldiofgetpos64.c, oldiofgetpos.c,
oldiofsetpos64.c, oldiofsetpos.c, peekc.c, putc.c, putchar.c, putwc.c,
putwchar.c and rewind.c with exceptions.
* sysdeps/generic/bits/stdio-lock.h (_IO_acquire_lock,
_IO_release_lock): Define.
* libio/fileops.c (_IO_new_file_underflow): Use it.
* libio/fputc.c (fputc): Likewise.
* libio/fputwc.c (fputwc): Likewise.
* libio/freopen64.c (freopen64):
* libio/freopen.c (freopen): Likewise.
* libio/fseek.c (fseek): Likewise.
* libio/fseeko64.c (fseeko64): Likewise.
* libio/fseeko.c (fseeko): Likewise.
* libio/ftello64.c (ftello64): Likewise.
* libio/ftello.c (ftello): Likewise.
* libio/fwide.c (fwide): Likewise.
* libio/getc.c (_IO_getc): Likewise.
* libio/getchar.c (getchar): Likewise.
* libio/getwc.c (_IO_getwc): Likewise.
* libio/getwchar.c (getwchar): Likewise.
* libio/iofclose.c (_IO_new_fclose):
* libio/iofflush.c (_IO_fflush): Likewise.
* libio/iofgetpos64.c (_IO_new_fgetpos64): Likewise.
* libio/iofgetpos.c (_IO_new_fgetpos): Likewise.
* libio/iofgets.c (_IO_fgets): Likewise.
* libio/iofgetws.c (fgetws): Likewise.
* libio/iofputs.c (_IO_fputs):
* libio/iofputws.c (_IO_fputs): Likewise.
* libio/iofread.c (_IO_fread): Likewise.
* libio/iofsetpos64.c (_IO_new_fsetpos64): Likewise.
* libio/iofsetpos.c (_IO_new_fsetpos): Likewise.
* libio/ioftell.c (_IO_ftell): Likewise.
* libio/iofwrite.c (_IO_fwrite): Likewise.
* libio/iogetdelim.c (_IO_getdelim): Likewise.
* libio/iogets.c (_IO_gets): Likewise.
* libio/ioputs.c (_IO_puts): Likewise.
* libio/ioseekoff.c (_IO_seekoff): Likewise.
* libio/ioseekpos.c (_IO_seekpos): Likewise.
* libio/iosetbuffer.c (_IO_setbuffer): Likewise.
* libio/iosetvbuf.c (_IO_setvbuf): Likewise.
* libio/ioungetc.c (_IO_ungetc): Likewise.
* libio/ioungetwc.c (ungetwc): Likewise.
* libio/oldiofclose.c (_IO_old_fclose): Likewise.
* libio/oldiofgetpos64.c (_IO_old_fgetpos64): Likewise.
* libio/oldiofgetpos.c (_IO_old_fgetpos): Likewise.
* libio/oldiofsetpos64.c (_IO_old_fsetpos64): Likewise.
* libio/oldiofsetpos.c (_IO_old_fsetpos): Likewise.
* libio/peekc.c (_IO_peekc_locked): Likewise.
* libio/putc.c (_IO_putc): Likewise.
* libio/putchar.c (putchar): Likewise.
* libio/putwc.c (putwc): Likewise.
* libio/putwchar.c (putwchar): Likewise.
* libio/rewind.c (rewind): Likewise.
* libio/wfileops.c (_IO_wfile_underflow): Likewise.
2003-08-29 19:58:49 +00:00
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# define _IO_acquire_lock(_fp) \
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2015-12-22 13:39:19 +00:00
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do { \
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2018-02-07 23:42:04 +00:00
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FILE *_IO_acquire_lock_file \
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2015-12-22 13:39:19 +00:00
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__attribute__((cleanup (_IO_acquire_lock_fct))) \
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= (_fp); \
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_IO_flockfile (_IO_acquire_lock_file);
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# else
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# define _IO_acquire_lock(_fp) _IO_acquire_lock_needs_exceptions_enabled
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# endif
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# define _IO_release_lock(_fp) ; } while (0)
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Update.
2003-08-29 Jakub Jelinek <jakub@redhat.com>
* libio/Makefile: Compile fputc.c, fputwc.c, freopen64.c, freopen.c,
fseek.c, fseeko64.c, fseeko.c, ftello64.c, ftello.c, fwide.c, getc.c,
getchar.c, getwc.c, getwchar.c, iofclose.c, iofflush.c, iofgetpos64.c,
iofgetpos.c, iofgets.c, iofgetws.c, iofputs.c, iofputws.c, iofread.c,
iofsetpos64.c, iofsetpos.c, ioftell.c, iofwrite.c, iogetdelim.c,
iogetline.c, iogets.c, iogetwline.c, ioputs.c, ioseekoff.c,
ioseekpos.c, iosetbuffer.c, iosetvbuf.c, ioungetc.c, ioungetwc.c,
oldfileops.c, oldiofclose.c, oldiofgetpos64.c, oldiofgetpos.c,
oldiofsetpos64.c, oldiofsetpos.c, peekc.c, putc.c, putchar.c, putwc.c,
putwchar.c and rewind.c with exceptions.
* sysdeps/generic/bits/stdio-lock.h (_IO_acquire_lock,
_IO_release_lock): Define.
* libio/fileops.c (_IO_new_file_underflow): Use it.
* libio/fputc.c (fputc): Likewise.
* libio/fputwc.c (fputwc): Likewise.
* libio/freopen64.c (freopen64):
* libio/freopen.c (freopen): Likewise.
* libio/fseek.c (fseek): Likewise.
* libio/fseeko64.c (fseeko64): Likewise.
* libio/fseeko.c (fseeko): Likewise.
* libio/ftello64.c (ftello64): Likewise.
* libio/ftello.c (ftello): Likewise.
* libio/fwide.c (fwide): Likewise.
* libio/getc.c (_IO_getc): Likewise.
* libio/getchar.c (getchar): Likewise.
* libio/getwc.c (_IO_getwc): Likewise.
* libio/getwchar.c (getwchar): Likewise.
* libio/iofclose.c (_IO_new_fclose):
* libio/iofflush.c (_IO_fflush): Likewise.
* libio/iofgetpos64.c (_IO_new_fgetpos64): Likewise.
* libio/iofgetpos.c (_IO_new_fgetpos): Likewise.
* libio/iofgets.c (_IO_fgets): Likewise.
* libio/iofgetws.c (fgetws): Likewise.
* libio/iofputs.c (_IO_fputs):
* libio/iofputws.c (_IO_fputs): Likewise.
* libio/iofread.c (_IO_fread): Likewise.
* libio/iofsetpos64.c (_IO_new_fsetpos64): Likewise.
* libio/iofsetpos.c (_IO_new_fsetpos): Likewise.
* libio/ioftell.c (_IO_ftell): Likewise.
* libio/iofwrite.c (_IO_fwrite): Likewise.
* libio/iogetdelim.c (_IO_getdelim): Likewise.
* libio/iogets.c (_IO_gets): Likewise.
* libio/ioputs.c (_IO_puts): Likewise.
* libio/ioseekoff.c (_IO_seekoff): Likewise.
* libio/ioseekpos.c (_IO_seekpos): Likewise.
* libio/iosetbuffer.c (_IO_setbuffer): Likewise.
* libio/iosetvbuf.c (_IO_setvbuf): Likewise.
* libio/ioungetc.c (_IO_ungetc): Likewise.
* libio/ioungetwc.c (ungetwc): Likewise.
* libio/oldiofclose.c (_IO_old_fclose): Likewise.
* libio/oldiofgetpos64.c (_IO_old_fgetpos64): Likewise.
* libio/oldiofgetpos.c (_IO_old_fgetpos): Likewise.
* libio/oldiofsetpos64.c (_IO_old_fsetpos64): Likewise.
* libio/oldiofsetpos.c (_IO_old_fsetpos): Likewise.
* libio/peekc.c (_IO_peekc_locked): Likewise.
* libio/putc.c (_IO_putc): Likewise.
* libio/putchar.c (putchar): Likewise.
* libio/putwc.c (putwc): Likewise.
* libio/putwchar.c (putwchar): Likewise.
* libio/rewind.c (rewind): Likewise.
* libio/wfileops.c (_IO_wfile_underflow): Likewise.
2003-08-29 19:58:49 +00:00
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#endif
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2000-03-10 08:46:33 +00:00
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2015-09-04 16:21:14 +00:00
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#endif /* stdio-lock.h */
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