mbtowc-lock.h

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Hash : b1fcec6d
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Date : 2025-09-10T23:22:53

Remove support for IRIX.

* all-modules: Update comments.
* build-aux/install-reloc: Likewise.
* build-aux/reloc-ldflags: Likewise.
* gnulib-tool: Likewise.
* gnulib-tool.py: Likewise.
* gnulib-tool.sh: Likewise.
* lib/aligned-malloc.h: Likewise.
* lib/boot-time.c: Likewise.
* lib/c32is-impl.h: Likewise.
* lib/c32srtombs-state.c: Likewise.
* lib/c32to-impl.h: Likewise.
* lib/c32width.c: Likewise.
* lib/errno.in.h: Likewise.
* lib/euidaccess.c: Likewise.
* lib/fbufmode.c: Likewise.
* lib/fenv-except-state-get.c: Likewise.
* lib/fenv-except-state-set.c: Likewise.
* lib/fenv-except-tracking-clear.c: Likewise.
* lib/fenv-except-tracking-set.c: Likewise.
* lib/fenv-except-tracking-test.c: Likewise.
* lib/fenv-except-trapping.c: Likewise.
* lib/fenv-round.c: Likewise.
* lib/fflush.c: Likewise.
* lib/fileblocks.c: Likewise.
* lib/forkpty.c: Likewise.
* lib/fpending.c: 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/getdomainname.c: Likewise.
* lib/idpriv-drop.c: Likewise.
* lib/idpriv-droptemp.c: Likewise.
* lib/limits.in.h: Likewise.
* lib/mbrtoc16.c: Likewise.
* lib/mbrtoc32.c: Likewise.
* lib/mbsrtoc32s-state.c: Likewise.
* lib/mbsrtowcs-state.c: Likewise.
* lib/mbtowc-lock.h: Likewise.
* lib/minmax.h: Likewise.
* lib/netdb.in.h: Likewise.
* lib/pipe-filter-ii.c: Likewise.
* lib/posix_openpt.c: Likewise.
* lib/ptsname_r.c: Likewise.
* lib/readutmp.c: Likewise.
* lib/readutmp.h: Likewise.
* lib/resource-ext.h: Likewise.
* lib/safe-read.h: Likewise.
* lib/safe-write.h: Likewise.
* lib/save-cwd.c: Likewise.
* lib/stdbool.in.h: Likewise.
* lib/striconv.c: Likewise.
* lib/striconveh.c: Likewise.
* lib/termcap.h: Likewise.
* lib/terminfo.h: Likewise.
* lib/unistd.in.h: Likewise.
* lib/vasnprintf.c: Likewise.
* lib/wcrtomb.c: Likewise.
* lib/wcsrtombs-state.c: Likewise.
* m4/fenv-environment.m4: Likewise.
* m4/fenv-exceptions-state.m4: Likewise.
* m4/fenv-exceptions-tracking.m4: Likewise.
* m4/fenv-rounding.m4: Likewise.
* m4/fmod.m4: Likewise.
* m4/getdomainname.m4: Likewise.
* m4/getloadavg.m4: Likewise.
* m4/getopt.m4: Likewise.
* m4/hypot.m4: Likewise.
* m4/hypotf.m4: Likewise.
* m4/hypotl.m4: Likewise.
* m4/iconv.m4: Likewise.
* m4/intl-thread-locale.m4: Likewise.
* m4/largefile.m4: Likewise.
* m4/libdl.m4: Likewise.
* m4/locale-ja.m4: Likewise.
* m4/locale_h.m4: Likewise.
* m4/log.m4: Likewise.
* m4/log10.m4: Likewise.
* m4/log10f.m4: Likewise.
* m4/logf.m4: Likewise.
* m4/modf.m4: Likewise.
* m4/modff.m4: Likewise.
* m4/modfl.m4: Likewise.
* m4/pthread-rwlock.m4: Likewise.
* m4/semaphore.m4: Likewise.
* m4/socklen.m4: Likewise.
* m4/stdint.m4: Likewise.
* m4/strtod.m4: Likewise.
* m4/strtof.m4: Likewise.
* m4/strtold.m4: Likewise.
* modules/sigsegv: Likewise.
* posix-modules: Likewise.
* pygnulib/GLImport.py: Likewise.
* tests/init.sh: Likewise.
* tests/test-echo.sh: Likewise.
* tests/test-isatty.c: Likewise.
* tests/test-math-h.c: Likewise.
* tests/test-nonblocking-pipe.h: Likewise.
* tests/test-nonblocking-socket.h: Likewise.
* tests/test-strtod.h: Likewise.
* tests/test-strtof.h: Likewise.
* tests/test-strtold.h: Likewise.
* tests/test-vasnprintf.c: Likewise.
* tests/test-vasnwprintf.c: Likewise.

Download

lib/mbtowc-lock.h

/* Use the internal lock used by mbrtowc and mbrtoc32.
   Copyright (C) 2019-2025 Free Software Foundation, Inc.

   This file is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as
   published by the Free Software Foundation; either version 2.1 of the
   License, or (at your option) any later version.

   This file is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <bruno@clisp.org>, 2019-2020.  */

/* Use a lock, so that no two threads can invoke mbtowc at the same time.  */

static inline int
mbtowc_unlocked (wchar_t *pwc, const char *p, size_t m)
{
  /* Put the hidden internal state of mbtowc into an initial state.
     This is needed at least with glibc, uClibc, and MSVC CRT.
     See <https://sourceware.org/PR9674>.  */
  mbtowc (NULL, NULL, 0);

  return mbtowc (pwc, p, m);
}

/* Prohibit renaming this symbol.  */
#undef gl_get_mbtowc_lock

#if AVOID_ANY_THREADS || GNULIB_MBRTOWC_SINGLE_THREAD

/* All uses of this function are in a single thread.  No locking needed.  */

static int
mbtowc_with_lock (wchar_t *pwc, const char *p, size_t m)
{
  return mbtowc_unlocked (pwc, p, m);
}

#elif defined _WIN32 && !defined __CYGWIN__

extern __declspec(dllimport) CRITICAL_SECTION *gl_get_mbtowc_lock (void);

static int
mbtowc_with_lock (wchar_t *pwc, const char *p, size_t m)
{
  CRITICAL_SECTION *lock = gl_get_mbtowc_lock ();
  int ret;

  EnterCriticalSection (lock);
  ret = mbtowc_unlocked (pwc, p, m);
  LeaveCriticalSection (lock);

  return ret;
}

#elif HAVE_PTHREAD_API /* AIX, Cygwin */

extern
# if defined _WIN32 || defined __CYGWIN__
  __declspec(dllimport)
# endif
  pthread_mutex_t *gl_get_mbtowc_lock (void);

# if HAVE_WEAK_SYMBOLS

   /* Avoid the need to link with '-lpthread'.  */
#  pragma weak pthread_mutex_lock
#  pragma weak pthread_mutex_unlock

   /* Determine whether libpthread is in use.  */
#  pragma weak pthread_mutexattr_gettype
   /* See the comments in lock.h.  */
#  define pthread_in_use() \
     (pthread_mutexattr_gettype != NULL || c11_threads_in_use ())

# else
#  define pthread_in_use() 1
# endif

static int
mbtowc_with_lock (wchar_t *pwc, const char *p, size_t m)
{
  if (pthread_in_use())
    {
      pthread_mutex_t *lock = gl_get_mbtowc_lock ();
      int ret;

      if (pthread_mutex_lock (lock))
        abort ();
      ret = mbtowc_unlocked (pwc, p, m);
      if (pthread_mutex_unlock (lock))
        abort ();

      return ret;
    }
  else
    return mbtowc_unlocked (pwc, p, m);
}

#elif HAVE_THREADS_H

extern mtx_t *gl_get_mbtowc_lock (void);

static int
mbtowc_with_lock (wchar_t *pwc, const char *p, size_t m)
{
  mtx_t *lock = gl_get_mbtowc_lock ();
  int ret;

  if (mtx_lock (lock) != thrd_success)
    abort ();
  ret = mbtowc_unlocked (pwc, p, m);
  if (mtx_unlock (lock) != thrd_success)
    abort ();

  return ret;
}

#endif

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kc3-lang/gnulib/lib/mbtowc-lock.h

Commit

lib/mbtowc-lock.h