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/* Copyright (c) 2000 Shlomi Fish
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* alloc.c - the Freecell Solver compact allocator. Used to allocate
* columns and other small allocations of a short size. Is able to revert the
* last allocation.
*/
#define BUILDING_DLL 1
#include <stdlib.h>
#include <stdio.h>
#include "config.h"
#include "alloc.h"
#define ALLOCED_SIZE (64*1024-(256+128))
void fc_solve_compact_allocator_init(
fcs_compact_allocator_t * allocator
)
{
allocator->packs = (char * *)malloc(sizeof(allocator->packs[0]) * IA_STATE_PACKS_GROW_BY);
allocator->num_packs = 1;
allocator->max_ptr =
(allocator->ptr =
allocator->rollback_ptr =
allocator->packs[0] =
malloc(ALLOCED_SIZE))
+ ALLOCED_SIZE;
return;
}
void fc_solve_compact_allocator_extend(
fcs_compact_allocator_t * allocator
)
{
/* Allocate a new pack */
if (! ((++allocator->num_packs) & (IA_STATE_PACKS_GROW_BY-1)))
{
allocator->packs = (char * *)realloc(
allocator->packs,
sizeof(allocator->packs[0]) *
((allocator->num_packs) + IA_STATE_PACKS_GROW_BY)
);
}
allocator->max_ptr =
(allocator->ptr =
allocator->rollback_ptr =
allocator->packs[allocator->num_packs-1] =
malloc(ALLOCED_SIZE))
+ ALLOCED_SIZE;
}
void fc_solve_compact_allocator_finish(fcs_compact_allocator_t * allocator)
{
int a;
for(a=0;a<allocator->num_packs;a++)
{
free(allocator->packs[a]);
}
free(allocator->packs);
}
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