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28 Commits

Author SHA1 Message Date
Bruno Haible
be95b17ae9 lock: Provide guarantee to avoid writer starvation for rwlocks. 
The rationale is: 1) Read-preferring read-write locks are prone to
writer starvation if the number of reader threads multiplied by the
percentage of time they have the lock held is too high. 2) Write-
preferring read-write locks are the only reliable way to avoid this.
3) There have been reports of 'test-lock' hanging on glibc systems
http://lists.gnu.org/archive/html/bug-gnulib/2017-01/msg00009.html,
and glibc indeed implements read-preferring rwlocks by default, see
http://man7.org/linux/man-pages/man3/pthread_rwlockattr_setkind_np.3.html
and https://sourceware.org/bugzilla/show_bug.cgi?id=13701 .

* m4/pthread_rwlock_rdlock.m4: New file.
* m4/lock.m4 (gl_LOCK): Invoke gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER.
* lib/glthread/lock.h [USE_POSIX_THREADS]: Test
HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER. Use a different implementation
of rwlock initialization on glibc systems without
HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER. Use a different implementation
of rwlocks altogether on non-glibc systems without
HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER.
[USE_PTH_THREADS]: Use a different implementation of rwlocks altogether.
* lib/glthread/lock.c [USE_POSIX_THREADS]
(glthread_rwlock_init_for_glibc): New function.
[USE_POSIX_THREADS] (glthread_rwlock_rdlock_multithreaded): Update
comment.
[USE_PTH_THREADS]: New implementation of rwlocks.
[USE_WINDOWS_THREADS] (glthread_rwlock_rdlock_func): Prefer writers over
readers.
* modules/lock (Files): Add m4/pthread_rwlock_rdlock.m4.
(Depends-on): Add 'extensions'.
* tests/test-rwlock1.c: New file.
* lock-tests (Files): Add it.
(Depends-on): Add usleep.
(Makefile.am): Add test-rwlock1 to the tests.
 2017-01-05 12:51:36 +01:00
Paul Eggert
a3fd683de3 version-etc: new year 
* build-aux/gendocs.sh (version):
* doc/gendocs_template:
* doc/gendocs_template_min:
* doc/gnulib.texi:
* lib/version-etc.c (COPYRIGHT_YEAR):
Update copyright dates by hand in templates and the like.
* all files: Run 'make update-copyright'.
 2017-01-01 02:59:23 +00:00
Paul Eggert
71090a2a31 version-etc: new year 
* build-aux/gendocs.sh (version):
* doc/gendocs_template:
* doc/gendocs_template_min:
* doc/gnulib.texi:
* lib/version-etc.c (COPYRIGHT_YEAR):
Update copyright dates by hand in templates and the like.
* all files: Run 'make update-copyright'.
 2016-01-01 00:57:21 -08:00
Paul Eggert
b9bfe78424 version-etc: new year 
* doc/gnulib.texi:
* lib/version-etc.c (COPYRIGHT_YEAR): Update copyright date.
* all files: Run 'make update-copyright'.
 2014-12-31 17:47:54 -08:00
Eric Blake
1276a2c5f2 maint: update copyright 
I ran 'make update-copyright'.

Signed-off-by: Eric Blake <eblake@redhat.com>
 2014-01-01 00:07:10 -07:00
Daiki Ueno
3fe906e982 lock: work around pthread recursive mutexes bug in Mac OS X 10.6 
* m4/lock.m4: Don't define HAVE_PTHREAD_MUTEX_RECURSIVE if the
compilation target is Mac OS X 10.6.
Problem reported by parafin and Andoni Morales in
<http://savannah.gnu.org/bugs/?37844> and
<http://lists.gnu.org/archive/html/bug-gettext/2013-05/msg00007.html>.
 2013-05-11 20:04:31 -07:00
Eric Blake
9fc81090f6 maint: update all copyright year number ranges 
Run "make update-copyright".  Compare to commit 1602f0a from last year.

Signed-off-by: Eric Blake <eblake@redhat.com>
 2013-01-01 00:50:58 +00:00
Paul Eggert
30d594eb30 cond, lock, thread: better 'inline' 
* lib/glthread/cond.c, lib/glthread/cond.h (_GLTHREAD_COND_INLINE):
* lib/glthread/thread.c, lib/glthread/thread.h (_GLTHREAD_THREAD_INLINE):
New macros.  Use them instead of static inline, for header functions.
* lib/glthread/cond.c (gl_waitqueue_init, gl_waitqueue_remove)
(gl_waitqueue_notify_first, gl_waitqueue_notify_all):
* lib/glthread/lock.c (gl_waitqueue_init)
(gl_waitqueue_notify_first, gl_waitqueue_notify_all):
* lib/glthread/thread.c (get_current_thread_handle):
Change 'static inline' to 'inline'.
* lib/glthread/cond.h, lib/glthread/thread.h:
Use _GL_INLINE_HEADER_BEGIN, _GL_INLINE_HEADER_END.
* m4/cond.m4 (gl_COND):
* m4/lock.m4 (gl_PREREQ_LOCK):
* m4/thread.m4 (gl_THREAD):
Do not require AC_C_INLINE.
* modules/cond, modules/thread (Depends-on): Add extern-inline.
 2012-11-29 23:38:54 -08:00
Bruno Haible
06b335ade6 Write "Mac OS X" instead of "MacOS X". 
* README: Write "Mac OS X" instead of "MacOS X".
* build-aux/bootstrap: Likewise.
* build-aux/install-reloc: Likewise.
* lib/acl-internal.h: Likewise.
* lib/acl_entries.c: Likewise.
* lib/argp-ba.c: Likewise.
* lib/argp-pv.c: Likewise.
* lib/config.charset: Likewise.
* lib/copy-acl.c: Likewise.
* lib/csharpexec.c: Likewise.
* lib/euidaccess.c: Likewise.
* lib/fbufmode.c: Likewise.
* lib/fflush.c: Likewise.
* lib/file-has-acl.c: Likewise.
* lib/filemode.h: Likewise.
* lib/fpurge.c: Likewise.
* lib/freadable.c: Likewise.
* lib/freadahead.c: Likewise.
* lib/freading.c: Likewise.
* lib/freadptr.c: Likewise.
* lib/freadseek.c: Likewise.
* lib/fseeko.c: Likewise.
* lib/fseterr.c: Likewise.
* lib/fsusage.c: Likewise.
* lib/fwritable.c: Likewise.
* lib/fwriting.c: Likewise.
* lib/get-rusage-as.c: Likewise.
* lib/get-rusage-data.c: Likewise.
* lib/getdomainname.c: Likewise.
* lib/idpriv-drop.c: Likewise.
* lib/idpriv-droptemp.c: Likewise.
* lib/localcharset.c: Likewise.
* lib/locale.in.h: Likewise.
* lib/localename.c: Likewise.
* lib/mbsrtowcs-state.c: Likewise.
* lib/nproc.c: Likewise.
* lib/passfd.c: Likewise.
* lib/posix_openpt.c: Likewise.
* lib/printf-parse.c: Likewise.
* lib/progreloc.c: Likewise.
* lib/safe-read.h: Likewise.
* lib/safe-write.h: Likewise.
* lib/sched.in.h: Likewise.
* lib/set-mode-acl.c: Likewise.
* lib/signal.in.h: Likewise.
* lib/stdint.in.h: Likewise.
* lib/stdio-impl.h: Likewise.
* lib/stdlib.in.h: Likewise.
* lib/strtod.c: Likewise.
* lib/sys_select.in.h: Likewise.
* lib/tcgetsid.c: Likewise.
* lib/unistd.in.h: Likewise.
* lib/unlockpt.c: Likewise.
* lib/vasnprintf.c: Likewise.
* lib/vma-iter.c: Likewise.
* lib/wcsrtombs-state.c: Likewise.
* m4/acl.m4: Likewise.
* m4/acosl.m4: Likewise.
* m4/asinl.m4: Likewise.
* m4/atanl.m4: Likewise.
* m4/c-stack.m4: Likewise.
* m4/cosl.m4: Likewise.
* m4/expl.m4: Likewise.
* m4/extensions.m4: Likewise.
* m4/fdatasync.m4: Likewise.
* m4/fmal.m4: Likewise.
* m4/frexp.m4: Likewise.
* m4/frexpf.m4: Likewise.
* m4/frexpl.m4: Likewise.
* m4/fsusage.m4: Likewise.
* m4/getdomainname.m4: Likewise.
* m4/getloadavg.m4: Likewise.
* m4/getopt.m4: Likewise.
* m4/gettext.m4: Likewise.
* m4/gnulib-common.m4: Likewise.
* m4/intdiv0.m4: Likewise.
* m4/intlmacosx.m4: Likewise.
* m4/largefile.m4: Likewise.
* m4/ldexpl.m4: Likewise.
* m4/link-follow.m4: Likewise.
* m4/locale-ar.m4: Likewise.
* m4/locale-fr.m4: Likewise.
* m4/locale-ja.m4: Likewise.
* m4/locale-tr.m4: Likewise.
* m4/locale-zh.m4: Likewise.
* m4/locale_h.m4: Likewise.
* m4/lock.m4: Likewise.
* m4/logl.m4: Likewise.
* m4/mathfunc.m4: Likewise.
* m4/minus-zero.m4: Likewise.
* m4/mktime.m4: Likewise.
* m4/mmap-anon.m4: Likewise.
* m4/multiarch.m4: Likewise.
* m4/nanosleep.m4: Likewise.
* m4/nocrash.m4: Likewise.
* m4/poll.m4: Likewise.
* m4/printf-frexpl.m4: Likewise.
* m4/printf.m4: Likewise.
* m4/signbit.m4: Likewise.
* m4/sinl.m4: Likewise.
* m4/sqrtl.m4: Likewise.
* m4/strerror_r.m4: Likewise.
* m4/tanl.m4: Likewise.
* m4/threadlib.m4: Likewise.
* m4/ttyname_r.m4: Likewise.
* m4/unlink.m4: Likewise.
* m4/visibility.m4: Likewise.
* m4/wcwidth.m4: Likewise.
* tests/minus-zero.h: Likewise.
* tests/test-alloca-opt.c: Likewise.
* tests/test-copy-acl.sh: Likewise.
* tests/test-copy-file.sh: Likewise.
* tests/test-fdatasync.c: Likewise.
* tests/test-file-has-acl.sh: Likewise.
* tests/test-flock.c: Likewise.
* tests/test-fsync.c: Likewise.
* tests/test-localename.c: Likewise.
* tests/test-malloca.c: Likewise.
* tests/test-nonblocking-pipe.h: Likewise.
* tests/test-nonblocking-socket.h: Likewise.
* tests/test-openpty.c: Likewise.
* tests/test-posix_openpt.c: Likewise.
* tests/test-ptsname.c: Likewise.
* tests/test-ptsname_r.c: Likewise.
* tests/test-sameacls.c: Likewise.
* tests/test-select.h: Likewise.
* tests/test-set-mode-acl.sh: Likewise.
* tests/test-snprintf-posix.h: Likewise.
* tests/test-sprintf-posix.h: Likewise.
* tests/test-strtod.c: Likewise.
* tests/test-time.c: Likewise.
* tests/test-vasnprintf-posix.c: Likewise.
* tests/test-vasprintf-posix.c: Likewise.
* doc/acl-resources.txt: Likewise.
* doc/**/*.texi: Likewise.
Reported by Max Horn <max@quendi.de>.
 2012-06-22 13:28:15 +02:00
Jim Meyering
1602f0afed maint: update all copyright year number ranges 
Run "make update-copyright".
 2012-01-01 10:04:58 +01:00
Jim Meyering
d60f3b0c6b maint: update almost all copyright ranges to include 2011 
Run the new "make update-copyright" rule.
 2011-01-01 22:12:59 +01:00
Bruno Haible
2c4321f6d6 Modernize AC_TRY_COMPILE invocations. 2010-08-26 22:45:33 +02:00
Jim Meyering
b2e2010c7c update nearly all FSF copyright year lists to include 2010 
Use the same procedure as for 2009, outlined in
http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/20081
 2010-01-01 10:42:00 +01:00
Jim Meyering
42d1eda5dc many *.m4 files: improve m4 quoting 
99% of this change was performed by running the following commands:
git ls-files | grep '\.m4$' | xargs perl -pi \
  -e 's/(AC_\w+\()([^[()]+?)([,)])/$1\[$2]$3/g;' \
  -e 's/(AC_\w+\((?:\[[^,]+?\], ){1})([^,[()]+?)([,)])/$1\[$2]$3/g;' \
  -e 's/(AC_\w+\((?:\[[^,]+?\], ){2})([^,[()]+?)([,)])/$1\[$2]$3/g;' \
  -e 's/(AC_\w+\((?:\[[^,]+?\], ){3})([^,[()]+?)([,)])/$1\[$2]$3/g'
perl -pi -e 's/\[\.\.\.\]/.../' m4/onceonly.m4

The remainder were to add Copyright dates, increment serial numbers,
undo some changes in comments, exclude m4/intl.m4, and add quotes
around the "1" in ",1" where the unusual spacing prohibited the
above regexps from doing the job.  For more details, see
<http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/16175>.
 2009-01-14 11:24:37 +01:00
Bruno Haible
76bc00ad16 New module 'threadlib'. 2008-08-17 15:49:29 +02:00
Bruno Haible
370a438c6b New macro gl_DISABLE_THREADS. 2008-06-18 02:31:53 +02:00
Bruno Haible
2e9dd21ad2 Update version number, from gettext-0.17. 2007-11-07 02:00:34 +01:00
Bruno Haible
74f8d5870e Avoid defining AC_USE_SYSTEM_EXTENSIONS here. 2007-09-12 23:24:15 +00:00
Eric Blake
3740c324b0 Track CVS Autoconf on AC_USE_SYSTEM_EXTENSIONS. 
* m4/extensions.m4 (AC_USE_SYSTEM_EXTENSIONS): Update to CVS
Autoconf definition.
* modules/euidaccess (Depends-on): Add extensions, for
AC_USE_SYSTEM_EXTENSIONS with autoconf <= 2.59.
* modules/fnmatch (Depends-on): Likewise.
* modules/getaddrinfo (Depends-on): Likewise.
* modules/getdelim (Depends-on): Likewise.
* modules/getline (Depends-on): Likewise.
* modules/getsubopt (Depends-on): Likewise.
* modules/gettext (Depends-on): Likewise.
* modules/group-member (Depends-on): Likewise.
* modules/mbchar (Depends-on): Likewise.
* modules/memmem (Depends-on): Likewise.
* modules/mempcpy (Depends-on): Likewise.
* modules/memrchr (Depends-on): Likewise.
* modules/pagealign_alloc (Depends-on): Likewise.
* modules/readutmp (Depends-on): Likewise.
* modules/stpcpy (Depends-on): Likewise.
* modules/stpncpy (Depends-on): Likewise.
* modules/strchrnul (Depends-on): Likewise.
* modules/strndup (Depends-on): Likewise.
* modules/strsep (Depends-on): Likewise.
* modules/strverscmp (Depends-on): Likewise.
* modules/vasprintf (Depends-on): Likewise.
* modules/wcwidth (Depends-on): Likewise.
* m4/euidaccess.m4 (gl_FUNC_EUIDACCESS): AC_GNU_SOURCE will be
obsolete in Autoconf 2.62; use AC_USE_SYSTEM_EXTENSIONS instead.
* m4/fnmatch.m4 (gl_FUNC_FNMATCH_GNU): Likewise.
* m4/getaddrinfo.m4 (gl_PREREQ_GETADDR_INFO): Likewise.
* m4/getdelim.m4 (gl_FUNC_GETDELIM): Likewise.
* m4/getline.m4 (gl_FUNC_GETLINE): Likewise.
* m4/getsubopt.m4 (gl_FUNC_GETSUBOPT): Likewise.
* m4/glob.m4 (gl_PREREQ_GLOB): Likewise.
* m4/group-member.m4 (gl_FUNC_GROUP_MEMBER): Likewise.
* m4/mbchar.m4 (gl_MBCHAR): Likewise.
* m4/memmem.m4 (gl_FUNC_MEMMEM): Likewise.
* m4/mempcpy.m4 (gl_FUNC_MEMPCPY): Likewise.
* m4/memrchr.m4 (gl_FUNC_MEMRCHR): Likewise.
* m4/mmap-anon.m4 (gl_FUNC_MMAP_ANON): Likewise.
* m4/pagealign_alloc.m4 (gl_PAGEALIGN_ALLOC): Likewise.
* m4/readutmp.m4 (gl_READUTMP): Likewise.
* m4/regex.m4 (gl_PREREQ_REGEX): Likewise.
* m4/stpcpy.m4 (gl_FUNC_STPCPY): Likewise.
* m4/stpncpy.m4 (gl_FUNC_STPNCPY): Likewise.
* m4/strchrnul.m4 (gl_FUNC_STRCHRNUL): Likewise.
* m4/strndup.m4 (gl_FUNC_STRNDUP): Likewise.
* m4/strnlen.m4 (gl_FUNC_STRNLEN): Likewise.
* m4/strsep.m4 (gl_FUNC_STRSEP): Likewise.
* m4/strverscmp.m4 (gl_FUNC_STRVERSCMP): Likewise.
* m4/vasprintf.m4 (gl_PREREQ_VASPRINTF_H): Likewise.
* m4/wcwidth.m4 (gl_FUNC_WCWIDTH): Likewise.
* m4/lock.m4 (gl_LOCK_EARLY_BODY): Likewise, but provide fallback,
so that lock.m4 can be used in gettext without extensions module.
 2007-09-12 15:59:57 +00:00
Bruno Haible
a692f46090 Upgrade to GNU gettext 0.16. 2006-10-27 14:06:54 +00:00
Bruno Haible
5c5ae42a00 Make it possible to invoke AC_GNU_SOURCE after gl_LOCK_EARLY. 2006-10-04 16:38:45 +00:00
Bruno Haible
e1c5c74989 Avoid warning at configure time with "gcc -Wall". 2006-09-22 20:10:26 +00:00
Bruno Haible
0081433a01 Turn off MT for OSF/1 by default. 2006-08-23 12:11:02 +00:00
Bruno Haible
8e85589bab Separate the "early" and the "normal" part of the macro. 2006-08-23 12:04:46 +00:00
Bruno Haible
1536745079 Ensure automatic ordering between gl_LOCK and gl_ARGP. 2006-01-11 13:01:13 +00:00
Bruno Haible
304a51d097 OSF/1 4.0 cc does not have weak. 2005-07-26 12:45:33 +00:00
Bruno Haible
028f9adaea Portability fixes for IRIX, Solaris, HP-UX, AIX, OSF/1. 2005-07-26 12:35:20 +00:00
Bruno Haible
76c867feaa New gnulib module 'lock'. 2005-07-18 11:35:09 +00:00