text: /****************************************************************************
   *
   * Copyright 2016 Samsung Electronics All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied. See the License for the specific
   * language governing permissions and limitations under the License.
   *
   ****************************************************************************/
  /****************************************************************************
   * mm/umm_heap/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 <tinyara/config.h>
  #include <stdlib.h>
  #include <tinyara/mm/mm.h>
  
  #if !defined(CONFIG_BUILD_PROTECTED) || !defined(__KERNEL__)
  
  /****************************************************************************
   * Pre-processor Definitions
   ****************************************************************************/
  
  /****************************************************************************
   * Private Functions
   ****************************************************************************/
  
  /****************************************************************************
   * Public Functions
   ****************************************************************************/
  /************************************************************************
   * Name: memalign_at
   *
   * Description:
   *   memalign to the specific heap.
   *
   * Return Value:
   *   The address of the allocated memory (NULL on failure to allocate)
   *
   ************************************************************************/
  
  #if CONFIG_MM_NHEAPS > 1
  void *memalign_at(int heap_index, size_t alignment, size_t size)
  {
  	if (heap_index >= CONFIG_MM_NHEAPS || heap_index < 0) {
  		mdbg("memalign_at failed. Wrong heap index (%d) of (%d)\n", heap_index, CONFIG_MM_NHEAPS);
  		return NULL;
  	}
  #ifdef CONFIG_DEBUG_MM_HEAPINFO
  	ARCH_GET_RET_ADDRESS
  	return mm_memalign(&g_mmheap[heap_index], alignment, size, retaddr);
  #else
  	return mm_memalign(&g_mmheap[heap_index], alignment, size);
  #endif
  }
  #endif
  /****************************************************************************
   * 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)
  {
  	int heap_idx;
  	void *ret;
  #ifdef CONFIG_DEBUG_MM_HEAPINFO
  	ARCH_GET_RET_ADDRESS
  #endif
  	for (heap_idx = 0; heap_idx < CONFIG_MM_NHEAPS; heap_idx++) {
  #ifdef CONFIG_DEBUG_MM_HEAPINFO
  		ret = mm_memalign(&g_mmheap[heap_idx], alignment, size, retaddr);
  #else
  		ret = mm_memalign(&g_mmheap[heap_idx], alignment, size);
  #endif
  		if (ret != NULL) {
  			return ret;
  		}
  	}
  	return NULL;
  }
  
  #endif							/* !CONFIG_BUILD_PROTECTED || !__KERNEL__ */
  