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amiga-clib2/library/stdlib_decay_unused_slabs.c
2016-12-04 11:05:30 +01:00

76 lines
2.5 KiB
C

/*
* :ts=4
*
* Portable ISO 'C' (1994) runtime library for the Amiga computer
* Copyright (c) 2002-2015 by Olaf Barthel <obarthel (at) gmx.net>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Neither the name of Olaf Barthel nor the names of 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.
*/
#ifndef _STDLIB_HEADERS_H
#include "stdlib_headers.h"
#endif /* _STDLIB_HEADERS_H */
/****************************************************************************/
#ifndef _STDLIB_MEMORY_H
#include "stdlib_memory.h"
#endif /* _STDLIB_MEMORY_H */
/****************************************************************************/
/* Look at all currently unused slabs, decrementing the decay
* counter which prevents them from being reused.
*/
void
__decay_unused_slabs(void)
{
if(__slab_data.sd_InUse)
{
struct MinNode * free_node;
struct MinNode * free_node_next;
struct SlabNode * sn;
__memory_lock();
for(free_node = (struct MinNode *)__slab_data.sd_EmptySlabs.mlh_Head ;
free_node->mln_Succ != NULL ;
free_node = free_node_next)
{
free_node_next = (struct MinNode *)free_node->mln_Succ;
/* free_node points to SlabNode.sn_EmptyLink, which
* directly follows the SlabNode.sn_MinNode.
*/
sn = (struct SlabNode *)&free_node[-1];
if(sn->sn_EmptyDecay > 0)
sn->sn_EmptyDecay--;
}
__memory_unlock();
}
}