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/**CFile****************************************************************
FileName [wlcPth.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Verilog parser.]
Synopsis [Abstraction for word-level networks.]
Author [Yen-Sheng Ho, Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: wlcPth.c $]
***********************************************************************/
#include "wlc.h"
#include "sat/bmc/bmc.h"
#ifdef ABC_USE_PTHREADS
#ifdef _WIN32
#include "../lib/pthread.h"
#else
#include <pthread.h>
#include <unistd.h>
#endif
#endif
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
extern Abc_Ntk_t * Abc_NtkFromAigPhase( Aig_Man_t * pAig );
extern int Abc_NtkDarBmc3( Abc_Ntk_t * pAbcNtk, Saig_ParBmc_t * pBmcPars, int fOrDecomp );
extern int Wla_ManShrinkAbs( Wla_Man_t * pWla, int nFrames, int RunId );
static volatile int g_nRunIds = 0; // the number of the last prover instance
int Wla_CallBackToStop( int RunId ) { assert( RunId <= g_nRunIds ); return RunId < g_nRunIds; }
int Wla_GetGlobalRunId() { return g_nRunIds; }
#ifndef ABC_USE_PTHREADS
void Wla_ManJoinThread( Wla_Man_t * pWla, int RunId ) {}
void Wla_ManConcurrentBmc3( Wla_Man_t * pWla, Aig_Man_t * pAig, Abc_Cex_t ** ppCex ) {}
#else // pthreads are used
// information given to the thread
typedef struct Bmc3_ThData_t_
{
Wla_Man_t * pWla;
Aig_Man_t * pAig;
Abc_Cex_t ** ppCex;
int RunId;
int fVerbose;
} Bmc3_ThData_t;
// mutext to control access to shared variables
extern pthread_mutex_t g_mutex;
void Wla_ManJoinThread( Wla_Man_t * pWla, int RunId )
{
int status;
if ( RunId == g_nRunIds )
{
status = pthread_mutex_lock(&g_mutex); assert( status == 0 );
++g_nRunIds;
status = pthread_mutex_unlock(&g_mutex); assert( status == 0 );
}
status = pthread_join( *(pthread_t *)(pWla->pThread), NULL );
assert( status == 0 );
ABC_FREE( pWla->pThread );
pWla->pThread = NULL;
}
void * Wla_Bmc3Thread ( void * pArg )
{
int status;
int RetValue = -1;
int nFramesNoChangeLim = 10;
Bmc3_ThData_t * pData = (Bmc3_ThData_t *)pArg;
Abc_Ntk_t * pAbcNtk = Abc_NtkFromAigPhase( pData->pAig );
Saig_ParBmc_t BmcPars, *pBmcPars = &BmcPars;
Saig_ParBmcSetDefaultParams( pBmcPars );
pBmcPars->pFuncStop = Wla_CallBackToStop;
pBmcPars->RunId = pData->RunId;
if ( pData->pWla->pPars->fShrinkAbs )
pBmcPars->nFramesMax = pData->pWla->iCexFrame + nFramesNoChangeLim;
RetValue = Abc_NtkDarBmc3( pAbcNtk, pBmcPars, 0 );
if ( RetValue == 0 )
{
assert( pAbcNtk->pSeqModel );
*(pData->ppCex) = pAbcNtk->pSeqModel;
pAbcNtk->pSeqModel = NULL;
if ( pData->fVerbose )
Abc_Print( 1, "Bmc3 found CEX. RunId=%d.\n", pData->RunId );
status = pthread_mutex_lock(&g_mutex); assert( status == 0 );
++g_nRunIds;
status = pthread_mutex_unlock(&g_mutex); assert( status == 0 );
}
else if ( RetValue == -1 )
{
if ( pData->RunId < g_nRunIds && pData->fVerbose )
Abc_Print( 1, "Bmc3 was cancelled. RunId=%d.\n", pData->RunId );
if ( pData->pWla->nIters > 1 && pData->RunId == g_nRunIds )
{
RetValue = Wla_ManShrinkAbs( pData->pWla, pData->pWla->iCexFrame + nFramesNoChangeLim, pData->RunId );
pData->pWla->iCexFrame += nFramesNoChangeLim;
if ( RetValue == 1 )
{
pData->pWla->fNewAbs = 1;
status = pthread_mutex_lock(&g_mutex); assert( status == 0 );
++g_nRunIds;
status = pthread_mutex_unlock(&g_mutex); assert( status == 0 );
}
}
}
// free memory
Abc_NtkDelete( pAbcNtk );
Aig_ManStop( pData->pAig );
ABC_FREE( pData );
// quit this thread
pthread_exit( NULL );
assert(0);
return NULL;
}
void Wla_ManConcurrentBmc3( Wla_Man_t * pWla, Aig_Man_t * pAig, Abc_Cex_t ** ppCex )
{
int status;
Bmc3_ThData_t * pData;
assert( pWla->pThread == NULL );
pWla->pThread = (void *)ABC_CALLOC( pthread_t, 1 );
pData = ABC_CALLOC( Bmc3_ThData_t, 1 );
pData->pWla = pWla;
pData->pAig = pAig;
pData->ppCex = ppCex;
pData->RunId = g_nRunIds;
pData->fVerbose = pWla->pPars->fVerbose;
status = pthread_create( (pthread_t *)pWla->pThread, NULL, Wla_Bmc3Thread, pData );
assert( status == 0 );
}
#endif // pthreads are used
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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