src/cuBdd/cuddInit.c File Reference

#include "util.h"
#include "cuddInt.h"

Include dependency graph for cuddInit.c:

Go to the source code of this file.

Functions
DdManager *	Cudd_Init (unsigned int numVars, unsigned int numVarsZ, unsigned int numSlots, unsigned int cacheSize, unsigned long maxMemory)
void	Cudd_Quit (DdManager *unique)
int	cuddZddInitUniv (DdManager *zdd)
void	cuddZddFreeUniv (DdManager *zdd)
Variables
static char rcsid[]	DD_UNUSED = "$Id: cuddInit.c,v 1.33 2007/07/01 05:10:50 fabio Exp $"

---

Function Documentation

DdManager* Cudd_Init	(	unsigned int	numVars,
		unsigned int	numVarsZ,
		unsigned int	numSlots,
		unsigned int	cacheSize,
		unsigned long	maxMemory
	)

AutomaticStart AutomaticEnd 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]

Definition at line 121 of file cuddInit.c.

{
    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 = 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 = 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;

    return(unique);

} /* end of Cudd_Init */

void Cudd_Quit

(

DdManager *

unique

)

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]

Definition at line 218 of file cuddInit.c.

{
    if (unique->stash != NULL) FREE(unique->stash);
    cuddFreeTable(unique);

} /* end of Cudd_Quit */

void cuddZddFreeUniv

(

DdManager *

zdd

)

Function********************************************************************

Synopsis [Frees the ZDD universe.]

Description [Frees the ZDD universe.]

SideEffects [None]

SeeAlso [cuddZddInitUniv]

Definition at line 294 of file cuddInit.c.

{
    if (zdd->univ) {
        Cudd_RecursiveDerefZdd(zdd, zdd->univ[0]);
        FREE(zdd->univ);
    }

} /* end of cuddZddFreeUniv */

int cuddZddInitUniv

(

DdManager *

zdd

)

Function********************************************************************

Synopsis [Initializes the ZDD universe.]

Description [Initializes the ZDD universe. Returns 1 if successful; 0 otherwise.]

SideEffects [None]

SeeAlso [cuddZddFreeUniv]

Definition at line 245 of file cuddInit.c.

{
    DdNode      *p, *res;
    int         i;

    zdd->univ = 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);
            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 */

---

Variable Documentation

char rcsid [] DD_UNUSED = "$Id: cuddInit.c,v 1.33 2007/07/01 05:10:50 fabio Exp $" [static]

CFile***********************************************************************

FileName [cuddInit.c]

PackageName [cudd]

Synopsis [Functions to initialize and shut down the DD manager.]

Description [External procedures included in this module:

• Cudd_Init()
• Cudd_Quit()

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.]

Definition at line 82 of file cuddInit.c.