kc3-lang/gnulib/lib/aligned_alloc.c

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• Hash : a1da46a0
  Author :
  Date : 2024-11-04T17:50:09
  

  aligned_alloc: Fix test failures on macOS, Solaris (regr. 2024-10-30).
  
  * m4/aligned_alloc.m4 (gl_FUNC_ALIGNED_ALLOC): Check for the Solaris
  bug. Let the test program return a bit mask. Update cross-compilation
  guesses.
  * lib/aligned_alloc.c: Include <errno.h>.
  (aligned_alloc): Fail if the alignment is not a power of 2. Work around
  the Solaris bug.
  * modules/aligned_alloc (Depends-on): Add malloc-posix.
  * doc/posix-functions/aligned_alloc.texi: Mention the Solaris bug.
  

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• lib/aligned_alloc.c

• /* An aligned_alloc() function that works around platform bugs.
     Copyright (C) 2020-2024 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/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <stdlib.h>
  
  #include <errno.h>
  
  void *
  aligned_alloc (size_t alignment, size_t size)
  #undef aligned_alloc
  {
    if (alignment != 0 && (alignment & (alignment - 1)) == 0)
      {
        /* alignment is a power of 2.  */
        if (size == 0)
          size = 1;
        if (alignment >= sizeof (void *))
          {
            /* Make size a multiple of alignment.  */
            size = (size + (alignment - 1)) & -alignment;
            if (size > 0)
              return aligned_alloc (alignment, size);
            else
              {
                errno = ENOMEM;
                return NULL;
              }
          }
        else
          return malloc (size);
      }
    else
      {
        errno = EINVAL;
        return NULL;
      }
  }
  

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