libcsupport/src/posix_memalign.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup libcsupport
0007  */
0008
0009 /*
0010  *  COPYRIGHT (c) 1989-2008.
0011  *  On-Line Applications Research Corporation (OAR).
0012  *
0013  * Redistribution and use in source and binary forms, with or without
0014  * modification, are permitted provided that the following conditions
0015  * are met:
0016  * 1. Redistributions of source code must retain the above copyright
0017  *    notice, this list of conditions and the following disclaimer.
0018  * 2. Redistributions in binary form must reproduce the above copyright
0019  *    notice, this list of conditions and the following disclaimer in the
0020  *    documentation and/or other materials provided with the distribution.
0021  *
0022  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0023  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0024  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0025  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0026  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0027  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0028  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0029  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0030  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0031  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0032  * POSSIBILITY OF SUCH DAMAGE.
0033  */
0034
0035 #ifdef HAVE_CONFIG_H
0036 #include "config.h"
0037 #endif
0038
0039 #ifdef RTEMS_NEWLIB
0040 #include "malloc_p.h"
0041
0042 #include <stdlib.h>
0043 #include <errno.h>
0044
0045 int posix_memalign(
0046   void   **memptr,
0047   size_t   alignment,
0048   size_t   size
0049 )
0050 {
0051   RTEMS_OBFUSCATE_VARIABLE( memptr );
0052
0053   if ( memptr == NULL ) {
0054     return EINVAL;
0055   }
0056
0057   *memptr = NULL;
0058
0059   if ( alignment < sizeof( void * ) ) {
0060     return EINVAL;
0061   }
0062
0063   if ( ( ( alignment - 1 ) & alignment ) != 0 ) {
0064     return EINVAL;
0065   }
0066
0067   if ( size == 0 ) {
0068     return 0;
0069   }
0070
0071   *memptr = rtems_heap_allocate_aligned_with_boundary( size, alignment, 0 );
0072
0073   if ( *memptr == NULL ) {
0074     return ENOMEM;
0075   }
0076
0077   return 0;
0078 }
0079 #endif