alpar@1: /* glpdmp.h (dynamic memory pool) */
alpar@1: 
alpar@1: /***********************************************************************
alpar@1: *  This code is part of GLPK (GNU Linear Programming Kit).
alpar@1: *
alpar@1: *  Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
alpar@1: *  2009, 2010 Andrew Makhorin, Department for Applied Informatics,
alpar@1: *  Moscow Aviation Institute, Moscow, Russia. All rights reserved.
alpar@1: *  E-mail: <mao@gnu.org>.
alpar@1: *
alpar@1: *  GLPK is free software: you can redistribute it and/or modify it
alpar@1: *  under the terms of the GNU General Public License as published by
alpar@1: *  the Free Software Foundation, either version 3 of the License, or
alpar@1: *  (at your option) any later version.
alpar@1: *
alpar@1: *  GLPK is distributed in the hope that it will be useful, but WITHOUT
alpar@1: *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
alpar@1: *  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
alpar@1: *  License for more details.
alpar@1: *
alpar@1: *  You should have received a copy of the GNU General Public License
alpar@1: *  along with GLPK. If not, see <http://www.gnu.org/licenses/>.
alpar@1: ***********************************************************************/
alpar@1: 
alpar@1: #ifndef GLPDMP_H
alpar@1: #define GLPDMP_H
alpar@1: 
alpar@1: #include "glpenv.h"
alpar@1: 
alpar@1: typedef struct DMP DMP;
alpar@1: 
alpar@1: #define DMP_BLK_SIZE 8000
alpar@1: /* size of memory blocks, in bytes, allocated for memory pools */
alpar@1: 
alpar@1: struct DMP
alpar@1: {     /* dynamic memory pool */
alpar@1: #if 0
alpar@1:       int size;
alpar@1:       /* size of atoms, in bytes, 1 <= size <= 256; if size = 0, atoms
alpar@1:          may have different sizes */
alpar@1: #endif
alpar@1:       void *avail[32];
alpar@1:       /* avail[k], 0 <= k <= 31, is a pointer to the first available
alpar@1:          (free) cell of (k+1)*8 bytes long; in the beginning of each
alpar@1:          free cell there is a pointer to another free cell of the same
alpar@1:          length */
alpar@1:       void *block;
alpar@1:       /* pointer to the most recently allocated memory block; in the
alpar@1:          beginning of each allocated memory block there is a pointer to
alpar@1:          the previously allocated memory block */
alpar@1:       int used;
alpar@1:       /* number of bytes used in the most recently allocated memory
alpar@1:          block */
alpar@1:       glp_long count;
alpar@1:       /* number of atoms which are currently in use */
alpar@1: };
alpar@1: 
alpar@1: #define dmp_create_pool _glp_dmp_create_pool
alpar@1: DMP *dmp_create_pool(void);
alpar@1: /* create dynamic memory pool */
alpar@1: 
alpar@1: #define dmp_get_atom _glp_dmp_get_atom
alpar@1: void *dmp_get_atom(DMP *pool, int size);
alpar@1: /* get free atom from dynamic memory pool */
alpar@1: 
alpar@1: #define dmp_free_atom _glp_dmp_free_atom
alpar@1: void dmp_free_atom(DMP *pool, void *atom, int size);
alpar@1: /* return atom to dynamic memory pool */
alpar@1: 
alpar@1: #define dmp_in_use _glp_dmp_in_use
alpar@1: glp_long dmp_in_use(DMP *pool);
alpar@1: /* determine how many atoms are still in use */
alpar@1: 
alpar@1: #define dmp_delete_pool _glp_dmp_delete_pool
alpar@1: void dmp_delete_pool(DMP *pool);
alpar@1: /* delete dynamic memory pool */
alpar@1: 
alpar@1: #endif
alpar@1: 
alpar@1: /* eof */