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/**CFile****************************************************************
FileName [cmdStarter.c]
SystemName [ABC: Logic synthesis and verification system.]
PackageName [Command processing package.]
Synopsis [Command to start many instances of ABC in parallel.]
Author [Alan Mishchenko]
Affiliation [UC Berkeley]
Date [Ver. 1.0. Started - June 20, 2005.]
Revision [$Id: cmdStarter.c,v 1.00 2005/06/20 00:00:00 alanmi Exp $]
***********************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "misc/util/abc_global.h"
// comment out this line to disable pthreads
#define ABC_USE_PTHREADS
#ifdef ABC_USE_PTHREADS
#ifdef WIN32
#include "../lib/pthread.h"
#else
#include <pthread.h>
#include <unistd.h>
#endif
#endif
ABC_NAMESPACE_IMPL_START
////////////////////////////////////////////////////////////////////////
/// DECLARATIONS ///
////////////////////////////////////////////////////////////////////////
#ifndef ABC_USE_PTHREADS
void Cmd_RunStarter( char * pFileName, int nCores ) {}
#else // pthreads are used
// the number of concurrently running threads
static volatile int nThreadsRunning = 0;
// mutex to control access to the number of threads
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
////////////////////////////////////////////////////////////////////////
/// FUNCTION DEFINITIONS ///
////////////////////////////////////////////////////////////////////////
/**Function*************************************************************
Synopsis [This procedures executes one call to system().]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void * Abc_RunThread( void * pCommand )
{
int status;
// perform the call
if ( system( (char *)pCommand ) )
{
fprintf( stderr, "The following command has returned non-zero exit status:\n" );
fprintf( stderr, "\"%s\"\n\n", (char *)pCommand );
fflush( stdout );
}
free( pCommand );
// decrement the number of threads runining
status = pthread_mutex_lock(&mutex); assert(status == 0);
nThreadsRunning--;
status = pthread_mutex_unlock(&mutex); assert(status == 0);
// quit this thread
//printf("...Finishing %s\n", (char *)Command);
pthread_exit( NULL );
assert(0);
return NULL;
}
/**Function*************************************************************
Synopsis [Takes file with commands to be executed and the number of CPUs.]
Description []
SideEffects []
SeeAlso []
***********************************************************************/
void Cmd_RunStarter( char * pFileName, int nCores )
{
FILE * pFile, * pOutput = stdout;
pthread_t * pThreadIds;
char * BufferCopy, * Buffer;
int nLines, LineMax, Line;
int i, c, status, Counter;
clock_t clk = clock();
// check the number of cores
if ( nCores < 2 )
{
fprintf( pOutput, "The number of cores (%d) should be more than 1.\n", nCores );
return;
}
// open the file and make sure it is available
pFile = fopen( pFileName, "rb" );
if ( pFile == NULL )
{
fprintf( pOutput, "Input file \"%s\" cannot be opened.\n", pFileName );
return;
}
// count the number of lines and the longest line
nLines = LineMax = Line = 0;
while ( (c = fgetc(pFile)) != EOF )
{
Line++;
if ( c != '\n' )
continue;
nLines++;
LineMax = Abc_MaxInt( LineMax, Line );
Line = 0;
}
LineMax += 10;
nLines += 10;
// allocate storage
Buffer = ABC_ALLOC( char, LineMax );
pThreadIds = ABC_ALLOC( pthread_t, nLines );
// read commands and execute at most <num> of them at a time
rewind( pFile );
for ( i = 0; fgets( Buffer, LineMax, pFile ) != NULL; i++ )
{
// get the command from the file
if ( Buffer[0] == '\n' || Buffer[0] == '\r' || Buffer[0] == '\t' ||
Buffer[0] == ' ' || Buffer[0] == '#')
{
continue;
}
if ( Buffer[strlen(Buffer)-1] == '\n' )
Buffer[strlen(Buffer)-1] = 0;
if ( Buffer[strlen(Buffer)-1] == '\r' )
Buffer[strlen(Buffer)-1] = 0;
// wait till there is an empty thread
while ( 1 )
{
status = pthread_mutex_lock(&mutex); assert(status == 0);
Counter = nThreadsRunning;
status = pthread_mutex_unlock(&mutex); assert(status == 0);
if ( Counter < nCores - 1 )
break;
// Sleep( 100 );
}
// increament the number of threads running
status = pthread_mutex_lock(&mutex); assert(status == 0);
nThreadsRunning++;
status = pthread_mutex_unlock(&mutex); assert(status == 0);
printf( "Calling: %s\n", (char *)Buffer );
fflush( stdout );
// create thread to execute this command
BufferCopy = Abc_UtilStrsav( Buffer );
status = pthread_create( &pThreadIds[i], NULL, Abc_RunThread, (void *)BufferCopy ); assert(status == 0);
assert( i < nLines );
}
ABC_FREE( pThreadIds );
ABC_FREE( Buffer );
fclose( pFile );
// wait for all the threads to finish
while ( 1 )
{
status = pthread_mutex_lock(&mutex); assert(status == 0);
Counter = nThreadsRunning;
status = pthread_mutex_unlock(&mutex); assert(status == 0);
if ( Counter == 0 )
break;
}
// cleanup
status = pthread_mutex_destroy(&mutex); assert(status == 0);
// assert(mutex == NULL);
printf( "Finished processing commands in file \"%s\". ", pFileName );
Abc_PrintTime( 1, "Total wall time", clock() - clk );
}
#endif
////////////////////////////////////////////////////////////////////////
/// END OF FILE ///
////////////////////////////////////////////////////////////////////////
ABC_NAMESPACE_IMPL_END
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