You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
3.4 KiB
91 lines
3.4 KiB
/**************************************************************************** |
|
* mm/mm_addfreechunk.c |
|
* |
|
* Copyright (C) 2007, 2009 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 "mm_environment.h" |
|
#include "mm_internal.h" |
|
|
|
/**************************************************************************** |
|
* Pre-processor Definitions |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Private Functions |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Global Functions |
|
****************************************************************************/ |
|
|
|
/**************************************************************************** |
|
* Name: mm_addfreechunk |
|
* |
|
* Description: |
|
* Add a free chunk to the node next. It is assumed that the caller holds |
|
* the mm semaphore |
|
* |
|
****************************************************************************/ |
|
|
|
void mm_addfreechunk(FAR struct mm_freenode_s *node) |
|
{ |
|
FAR struct mm_freenode_s *next; |
|
FAR struct mm_freenode_s *prev; |
|
|
|
/* Convert the size to a nodelist index */ |
|
|
|
int ndx = mm_size2ndx(node->size); |
|
|
|
/* Now put the new node int the next */ |
|
|
|
for (prev = &g_nodelist[ndx], next = g_nodelist[ndx].flink; |
|
next && next->size && next->size < node->size; |
|
prev = next, next = next->flink); |
|
|
|
/* Does it go in mid next or at the end? */ |
|
|
|
prev->flink = node; |
|
node->blink = prev; |
|
node->flink = next; |
|
|
|
if (next) |
|
{ |
|
/* The new node goes between prev and next */ |
|
|
|
next->blink = node; |
|
} |
|
}
|
|
|