/**CFile***********************************************************************
FileName [cuddInit.c]
PackageName [cudd]
Synopsis [Functions to initialize and shut down the DD manager.]
Description [External procedures included in this module:
Internal procedures included in this module:
- cuddZddInitUniv()
- cuddZddFreeUniv()
]
SeeAlso []
Author [Fabio Somenzi]
Copyright [Copyright (c) 1995-2004, Regents of the University of Colorado
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.
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.
Neither the name of the University of Colorado 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.]
******************************************************************************/
#include "util_hack.h"
#include "cuddInt.h"
ABC_NAMESPACE_IMPL_START
/*---------------------------------------------------------------------------*/
/* Constant declarations */
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
/* Stucture declarations */
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
/* Type declarations */
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/*---------------------------------------------------------------------------*/
/* Variable declarations */
/*---------------------------------------------------------------------------*/
#ifndef lint
static char rcsid[] DD_UNUSED = "$Id: cuddInit.c,v 1.33 2007/07/01 05:10:50 fabio Exp $";
#endif
/*---------------------------------------------------------------------------*/
/* Macro declarations */
/*---------------------------------------------------------------------------*/
/**AutomaticStart*************************************************************/
/*---------------------------------------------------------------------------*/
/* Static function prototypes */
/*---------------------------------------------------------------------------*/
/**AutomaticEnd***************************************************************/
/*---------------------------------------------------------------------------*/
/* Definition of exported functions */
/*---------------------------------------------------------------------------*/
/**Function********************************************************************
Synopsis [Creates a new DD manager.]
Description [Creates a new DD manager, initializes the table, the
basic constants and the projection functions. If maxMemory is 0,
Cudd_Init decides suitable values for the maximum size of the cache
and for the limit for fast unique table growth based on the available
memory. Returns a pointer to the manager if successful; NULL
otherwise.]
SideEffects [None]
SeeAlso [Cudd_Quit]
******************************************************************************/
DdManager *
Cudd_Init(
unsigned int numVars /* initial number of BDD variables (i.e., subtables) */,
unsigned int numVarsZ /* initial number of ZDD variables (i.e., subtables) */,
unsigned int numSlots /* initial size of the unique tables */,
unsigned int cacheSize /* initial size of the cache */,
unsigned long maxMemory /* target maximum memory occupation */)
{
DdManager *unique;
int i,result;
DdNode *one, *zero;
unsigned int maxCacheSize;
unsigned int looseUpTo;
extern DD_OOMFP MMoutOfMemory;
DD_OOMFP saveHandler;
if (maxMemory == 0) {
maxMemory = getSoftDataLimit();
}
looseUpTo = (unsigned int) ((maxMemory / sizeof(DdNode)) /
DD_MAX_LOOSE_FRACTION);
unique = cuddInitTable(numVars,numVarsZ,numSlots,looseUpTo);
if (unique == NULL) return(NULL);
unique->maxmem = (unsigned long) maxMemory / 10 * 9;
maxCacheSize = (unsigned int) ((maxMemory / sizeof(DdCache)) /
DD_MAX_CACHE_FRACTION);
result = cuddInitCache(unique,cacheSize,maxCacheSize);
if (result == 0) return(NULL);
saveHandler = MMoutOfMemory;
MMoutOfMemory = Cudd_OutOfMem;
unique->stash = ABC_ALLOC(char,(maxMemory / DD_STASH_FRACTION) + 4);
MMoutOfMemory = saveHandler;
if (unique->stash == NULL) {
(void) fprintf(unique->err,"Unable to set aside memory\n");
}
/* Initialize constants. */
unique->one = cuddUniqueConst(unique,1.0);
if (unique->one == NULL) return(0);
cuddRef(unique->one);
unique->zero = cuddUniqueConst(unique,0.0);
if (unique->zero == NULL) return(0);
cuddRef(unique->zero);
#ifdef HAVE_IEEE_754
if (DD_PLUS_INF_VAL != DD_PLUS_INF_VAL * 3 ||
DD_PLUS_INF_VAL != DD_PLUS_INF_VAL / 3) {
(void) fprintf(unique->err,"Warning: Crippled infinite values\n");
(void) fprintf(unique->err,"Recompile without -DHAVE_IEEE_754\n");
}
#endif
unique->plusinfinity = cuddUniqueConst(unique,DD_PLUS_INF_VAL);
if (unique->plusinfinity == NULL) return(0);
cuddRef(unique->plusinfinity);
unique->minusinfinity = cuddUniqueConst(unique,DD_MINUS_INF_VAL);
if (unique->minusinfinity == NULL) return(0);
cuddRef(unique->minusinfinity);
unique->background = unique->zero;
/* The logical zero is different from the CUDD_VALUE_TYPE zero! */
one = unique->one;
zero = Cudd_Not(one);
/* Create the projection functions. */
unique->vars = ABC_ALLOC(DdNodePtr,unique->maxSize);
if (unique->vars == NULL) {
unique->errorCode = CUDD_MEMORY_OUT;
return(NULL);
}
for (i = 0; i < unique->size; i++) {
unique->vars[i] = cuddUniqueInter(unique,i,one,zero);
if (unique->vars[i] == NULL) return(0);
cuddRef(unique->vars[i]);
}
if (unique->sizeZ)
cuddZddInitUniv(unique);
unique->memused += sizeof(DdNode *) * unique->maxSize;
unique->bFunc = NULL;
unique->bFunc2 = NULL;
unique->TimeStop = 0;
return(unique);
} /* end of Cudd_Init */
/**Function********************************************************************
Synopsis [Deletes resources associated with a DD manager.]
Description [Deletes resources associated with a DD manager and
resets the global statistical counters. (Otherwise, another manaqger
subsequently created would inherit the stats of this one.)]
SideEffects [None]
SeeAlso [Cudd_Init]
******************************************************************************/
void
Cudd_Quit(
DdManager * unique)
{
if (unique->stash != NULL) ABC_FREE(unique->stash);
cuddFreeTable(unique);
} /* end of Cudd_Quit */
/*---------------------------------------------------------------------------*/
/* Definition of internal functions */
/*---------------------------------------------------------------------------*/
/**Function********************************************************************
Synopsis [Initializes the ZDD universe.]
Description [Initializes the ZDD universe. Returns 1 if successful; 0
otherwise.]
SideEffects [None]
SeeAlso [cuddZddFreeUniv]
******************************************************************************/
int
cuddZddInitUniv(
DdManager * zdd)
{
DdNode *p, *res;
int i;
zdd->univ = ABC_ALLOC(DdNodePtr, zdd->sizeZ);
if (zdd->univ == NULL) {
zdd->errorCode = CUDD_MEMORY_OUT;
return(0);
}
res = DD_ONE(zdd);
cuddRef(res);
for (i = zdd->sizeZ - 1; i >= 0; i--) {
unsigned int index = zdd->invpermZ[i];
p = res;
res = cuddUniqueInterZdd(zdd, index, p, p);
if (res == NULL) {
Cudd_RecursiveDerefZdd(zdd,p);
ABC_FREE(zdd->univ);
return(0);
}
cuddRef(res);
cuddDeref(p);
zdd->univ[i] = res;
}
#ifdef DD_VERBOSE
cuddZddP(zdd, zdd->univ[0]);
#endif
return(1);
} /* end of cuddZddInitUniv */
/**Function********************************************************************
Synopsis [Frees the ZDD universe.]
Description [Frees the ZDD universe.]
SideEffects [None]
SeeAlso [cuddZddInitUniv]
******************************************************************************/
void
cuddZddFreeUniv(
DdManager * zdd)
{
if (zdd->univ) {
Cudd_RecursiveDerefZdd(zdd, zdd->univ[0]);
ABC_FREE(zdd->univ);
}
} /* end of cuddZddFreeUniv */
/*---------------------------------------------------------------------------*/
/* Definition of static functions */
/*---------------------------------------------------------------------------*/
ABC_NAMESPACE_IMPL_END