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linkm/init.c
Go to the documentation of this file.
/*
** Written by David Gerdes US Army Construction Engineering Research Lab
** April 1992
** Copyright 1992 USA-CERL All rights reserved.
**
****************************************************************************
*
* MODULE: LINKED LIST MEMORY MANAGER
*
* AUTHOR(S): David Gerdes 1992, US Army Construction Engineering Research
* Lab
*
* PURPOSE: Outputs a raster map layer showing the cumulative cost
* of moving between different geographic locations on an
* input raster map layer whose cell category values
* represent cost.
*
* COPYRIGHT: (C) 1999, 2006 by the GRASS Development Team
*
* This program is free software under the GNU General Public
* License (>=v2). Read the file COPYING that comes with GRASS
* for details.
*
***************************************************************************/
#include <stdlib.h>
#include <grass/linkm.h>
static int link_chunk_size = 100;
static int link_exit_flag = 0;
void link_set_chunk_size(int size)
{
link_chunk_size = size;
}
void link_exit_on_error(int flag)
{
link_exit_flag = flag;
}
struct link_head *link_init(int size)
{
struct link_head *Head;
if (NULL == (Head = (struct link_head *)malloc(sizeof(struct link_head))))
return NULL;
if (NULL ==
(Head->ptr_array = (VOID_T **)malloc(sizeof(VOID_T *) * PTR_CNT))) {
free(Head);
return NULL;
}
Head->max_ptr = 0;
Head->Unused = NULL;
Head->alloced = PTR_CNT;
Head->unit_size =
size < (int)sizeof(VOID_T *) ? (int)sizeof(VOID_T *) : size;
Head->chunk_size = link_chunk_size;
Head->exit_flag = link_exit_flag;
return Head;
}
void link_cleanup(struct link_head *Head)
{
register int i;
if (Head == NULL)
return;
if (Head->ptr_array) {
for (i = 0; i < Head->max_ptr; i++)
if (Head->ptr_array[i] != NULL)
free(Head->ptr_array[i]);
free(Head->ptr_array);
free(Head);
}
}
NULL
#define NULL
Definition ccmath.h:32
link_exit_on_error
void link_exit_on_error(int flag)
Definition linkm/init.c:37
link_cleanup
void link_cleanup(struct link_head *Head)
Definition linkm/init.c:67
link_set_chunk_size
void link_set_chunk_size(int size)
Definition linkm/init.c:32
link_init
struct link_head * link_init(int size)
Definition linkm/init.c:42
VOID_T
#define VOID_T
Definition qtree.h:28