void Tester::wakeup()
{
if (g_callback_counter < g_tester_length) {
// Try to perform an action or check
Check* check_ptr = m_checkTable.getRandomCheck();
assert(check_ptr != NULL);
check_ptr->initiate();
checkForDeadlock();
g_eventQueue_ptr->scheduleEvent(this, 2);
}
}
void main(int argc,char* argv[])
{
semID = semget((key_t)SEMAPHORE_KEY,6,IPC_CREAT|0666);
float probability;
if(argc!=2)
{
printf("Please provide probability as argument ! \n");
exit(1);
}
else
{
sscanf(argv[1],"%f",&probability);
if(probability < 0 || probability > 1)
{
printf("Please run the program with valid probability value : [0-1] \n");
exit(1);
}
}
char train_sequence[MAX_SEQUENCE_LENGTH];
int N,M=4;
if((N=parseInputFile(train_sequence))==-1)
{
printf("Error : Cannot open sequence.txt !\n");
exit(0);
}
printf("The sequence scanned from file : %s, N = %d\n",train_sequence,N);
initializeAllSubSemaphoreValues();
initializeMatrixFile(N,M);
srand(time(NULL));
int sequence_counter = 0,flag=0;
while(1)
{
if(flag)
{
sleep(1);
if(checkForDeadlock(N,M))
break;
continue;
}
if( ( (float)(rand()%1000) / 1000.0) < probability )
{
if(checkForDeadlock(N,M))
break;
}
else
{
if(sequence_counter==N)
flag = 1;
else
{
char c = train_sequence[sequence_counter];
sequence_counter++;
if(c!='N' && c!='S' && c!='W' && c!='E')
{
printf("Invalid Sequence in sequence.txt !\n");
exit(1);
}
else
{
/*
char command[50];
sprintf(command,"./train %c %d &",c,sequence_counter-1);
pid_arr[sequence_counter-1] = pid;
direction_arr[sequence_counter-1] = getDirString(c);
system(command);
*/
int pid = fork();
if(pid == 0)
{
//char command[50];
//sprintf(command,"./train %d %c %d",N,c,sequence_counter-1);
char** argv = malloc(4*sizeof(char*));
int y;
for(y=0;y<4;y++) argv[y] = malloc(10*sizeof(char));
strcpy(argv[0],"./train");
sprintf(argv[1],"%d",N);
sprintf(argv[2],"%c",c);
sprintf(argv[3],"%d",sequence_counter-1);
int retv = execvp(*argv,argv);
if(retv == -1) {perror("Error in execvp ! \n"); exit(1);}
exit(0);
}
printf("Train %d: %s Train started\n",pid,getDirString(c));
pid_arr[sequence_counter-1] = pid;
//printf("pid_arr[%d] = %d\n",sequence_counter-1,pid );
direction_arr[sequence_counter-1] = getDirString(c);
//printf("direction_arr[%d] = %s\n",sequence_counter-1,getDirString(c) );
}
}
}
}
}
void main(int argc,char* argv[])
{
int DPP;
float probability = 0.2;
if(argc!=3)
{
printf("Please run the program with 2 arguments : <DPP_toggle (0 or 1)> <probability> \n"); // DPP --> Deadlock Prevention Protocol
exit(1);
}
else
{
sscanf(argv[1],"%d",&DPP);
sscanf(argv[2],"%f",&probability);
if((DPP != 0 && DPP != 1)||(probability<0 || probability >1))
{
printf("Please run the program with valid arguments : <DPP_toggle (0 or 1)> <probability>\n"); // DPP --> Deadlock Prevention Protocol
exit(1);
}
}
semID = semget((key_t)SEMAPHORE_KEY,7,IPC_CREAT|0666);
initializeAllSubSemaphoreValues();
acquireMutexLock(MATRIX_MUTEX);
initializeMatrixFile();
releaseMutexLock(MATRIX_MUTEX);
int mssgQ0_ID=msgget((key_t)MSSG_Q0_KEY,IPC_CREAT|0666);
int mssgQ1_ID=msgget((key_t)MSSG_Q1_KEY,IPC_CREAT|0666);
int i;
for(i=0;i<NUM_PRODUCERS;i++)
{
char command[50];
sprintf(command,"xterm -hold -e ./producer %d %d %d &",MSSG_Q0_KEY,MSSG_Q1_KEY,i);
system(command);
sleep(1); // otherwise the item to be first inserted becomes the same for all the Queues due to the timeseeding : srand(time(NULL))
}
for(i=0;i<NUM_CONSUMERS;i++)
{
char command[50];
sprintf(command,"xterm -hold -e ./consumer %d %d %d %f %d &",MSSG_Q0_KEY,MSSG_Q1_KEY,NUM_PRODUCERS+i,probability,DPP);
system(command);
}
while(1)
{
int m,n; // if Deadlock is found, then Consumer m (Cm) and Consumer n (Cn) are such that Q0 --> Cm --> Q1 --> Cn --> Q0, in the Resource Allocation Graph
int found_deadlock = 0;
printf("Checking for Deadlock...\n");
acquireMutexLock(MATRIX_MUTEX);
found_deadlock = checkForDeadlock(&m,&n);
releaseMutexLock(MATRIX_MUTEX);
if(found_deadlock)
{
printf("\n\nDeadlock !!!\n\nDeadlocked Cycle : Q0 --> C%d --> Q1 --> C%d --> Q0 \n\nKilling all Processes...",m,n);
printf("\n\nPress a key to kill all Processes\n");
getch();
killAllProcesses();
appendResults(probability);
exit(0);
}
sleep(2);
}
}