openjpeg/src/lib/openjp2/opj_malloc.c

150 lines
4.9 KiB
C
Raw Normal View History

/*
* The copyright in this software is being made available under the 2-clauses
* BSD License, included below. This software may be subject to other third
* party and contributor rights, including patent rights, and no such rights
* are granted under this license.
*
* Copyright (c) 2015, Mathieu Malaterre <mathieu.malaterre@gmail.com>
* Copyright (c) 2015, Matthieu Darbois
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#define OPJ_SKIP_POISON
2015-10-18 02:23:01 +02:00
#include "opj_includes.h"
2015-10-18 02:23:01 +02:00
static INLINE void *opj_aligned_alloc_n(size_t alignment, size_t size)
{
void* ptr;
/* alignment shall be power of 2 */
assert( (alignment != 0U) && ((alignment & (alignment - 1U)) == 0U));
if (size == 0U) { /* prevent implementation defined behavior of realloc */
return NULL;
}
#if defined(HAVE_POSIX_MEMALIGN)
2015-10-12 21:24:10 +02:00
/* aligned_alloc requires c11, restrict to posix_memalign for now. Quote:
* This function was introduced in POSIX 1003.1d. Although this function is
* superseded by aligned_alloc, it is more portable to older POSIX systems
* that do not support ISO C11. */
if (posix_memalign (&ptr, alignment, size))
{
ptr = NULL;
}
/* older linux */
#elif defined(HAVE_MEMALIGN)
ptr = memalign( alignment, size );
/* _MSC_VER */
#elif defined(HAVE__ALIGNED_MALLOC)
2015-10-18 02:23:01 +02:00
ptr = _aligned_malloc(size, alignment);
#else
/* TODO: _mm_malloc(x,y) */
#error missing aligned alloc function
#endif
return ptr;
}
2015-10-18 02:23:01 +02:00
static INLINE void *opj_aligned_realloc_n(void *ptr, size_t alignment, size_t new_size)
2015-10-10 17:51:29 +02:00
{
void *r_ptr;
/* alignment shall be power of 2 */
assert( (alignment != 0U) && ((alignment & (alignment - 1U)) == 0U));
if (new_size == 0U) { /* prevent implementation defined behavior of realloc */
return NULL;
}
2015-10-10 17:51:29 +02:00
/* no portable aligned realloc */
#if defined(HAVE_POSIX_MEMALIGN) || defined(HAVE_MEMALIGN)
/* glibc doc states one can mixed aligned malloc with realloc */
r_ptr = realloc( ptr, new_size ); /* fast path */
2015-10-12 21:24:10 +02:00
/* we simply use `size_t` to cast, since we are only interest in binary AND
* operator */
if( ((size_t)r_ptr & (alignment - 1U)) != 0U ) {
/* this is non-trivial to implement a portable aligned realloc, so use a
* simple approach where we do not need a function that return the size of an
* allocated array (eg. _msize on Windows, malloc_size on MacOS,
* malloc_usable_size on systems with glibc) */
void *a_ptr = opj_aligned_alloc_n(alignment, new_size);
if (a_ptr != NULL) {
memcpy(a_ptr, r_ptr, new_size);
}
free( r_ptr );
r_ptr = a_ptr;
}
2015-10-10 17:51:29 +02:00
/* _MSC_VER */
#elif defined(HAVE__ALIGNED_MALLOC)
r_ptr = _aligned_realloc( ptr, new_size, alignment );
2015-10-10 17:51:29 +02:00
#else
/* TODO: _mm_malloc(x,y) */
#error missing aligned realloc function
#endif
return r_ptr;
2015-10-10 17:51:29 +02:00
}
void * opj_malloc(size_t size)
{
if (size == 0U) { /* prevent implementation defined behavior of realloc */
return NULL;
}
return malloc(size);
}
void * opj_calloc(size_t num, size_t size)
{
if (size == 0U) { /* prevent implementation defined behavior of realloc */
return NULL;
}
/* according to C89 standard, num == 0 shall return a valid pointer */
return calloc(num, size);
}
void *opj_aligned_malloc(size_t size)
{
return opj_aligned_alloc_n(16U, size);
2015-10-10 17:51:29 +02:00
}
void * opj_aligned_realloc(void *ptr, size_t size)
{
return opj_aligned_realloc_n(ptr, 16U, size);
}
void opj_aligned_free(void* ptr)
{
#ifdef HAVE__ALIGNED_MALLOC
_aligned_free( ptr );
#else
free( ptr );
#endif
}
void * opj_realloc(void *ptr, size_t new_size)
{
if (new_size == 0U) { /* prevent implementation defined behavior of realloc */
return NULL;
}
return realloc(ptr, new_size);
}
void opj_free(void *ptr)
{
free(ptr);
}