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/****************************************************************************
* mm/umm_memalign.c
*
* Copyright (C) 2007, 2009, 2011, 2013-2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdlib.h>
#include <nuttx/mm.h>
#if !defined(CONFIG_BUILD_PROTECTED) || !defined(__KERNEL__)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#if defined(CONFIG_ARCH_ADDRENV) && defined(CONFIG_BUILD_KERNEL)
/* In the kernel build, there a multiple user heaps; one for each task
* group. In this build configuration, the user heap structure lies
* in a reserved region at the beginning of the .bss/.data address
* space (CONFIG_ARCH_DATA_VBASE). The size of that region is given by
* ARCH_DATA_RESERVE_SIZE
*/
# include <nuttx/addrenv.h>
# define USR_HEAP (&ARCH_DATA_RESERVE->ar_usrheap)
#else
/* Otherwise, the user heap data structures are in common .bss */
# define USR_HEAP &g_mmheap
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: memalign
*
* Description:
* memalign requests more than enough space from malloc, finds a region
* within that chunk that meets the alignment request and then frees any
* leading or trailing space.
*
* The alignment argument must be a power of two (not checked). 8-byte
* alignment is guaranteed by normal malloc calls.
*
****************************************************************************/
FAR void *memalign(size_t alignment, size_t size)
{
return mm_memalign(USR_HEAP, alignment, size);
}
#endif /* !CONFIG_BUILD_PROTECTED || !__KERNEL__ */
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