void OneVehicle(int direc, int prio) {
ArriveBridge(direc,prio);
CrossBridge(direc,prio);
printf("%s %d %s %d\n","CROSSED Origin =",direc,"Priority =",prio);
ExitBridge(direc,prio);
}
void * Train ( void *arguments )
{
TrainInfo *train = (TrainInfo *)arguments;
/* Sleep to simulate different arrival times */
usleep (train->length*SLEEP_MULTIPLE);
ArriveBridge (train);
CrossBridge (train);
LeaveBridge (train);
free (train);
return NULL;
}
/*
* This function is started for each thread created by the
* main thread. Each thread is given a TrainInfo structure
* that specifies information about the train the individual
* thread is supposed to simulate.
*/
void * Train ( void *arguments )
{
TrainInfo *train = (TrainInfo *)arguments;
/* Sleep to simulate different arrival times */
usleep (train->length*SLEEP_MULTIPLE);
ArriveBridge (train);
CrossBridge (train);
LeaveBridge (train);
/* I decided that the paramter structure would be malloc'd
* in the main thread, but the individual threads are responsible
* for freeing the memory.
*
* This way I didn't have to keep an array of parameter pointers
* in the main thread.
*/
free (train);
return NULL;
}