Road.cpp

00001 #include <math.h>
00002 #include "Road.h"
00003 
00004 Road::Road(Intersection* intersection, int roadId) {
00005     active_cars = 0x00;
00006     last_car = NULL;
00007         
00008     this->intersection = intersection; 
00009     this->roadId = roadId; 
00010     next_release = 0;
00011     num_cars = 0;
00012     
00013     pending_car = new AccCar(num_cars + 5 * (roadId - 1), this, pow(2, num_cars));
00014     pending_car->set_target_speed(rand() % 11 + 5);
00015 }
00016 
00017 int Road::try_enter_car(int time) {
00018     if( next_release <= time && pending_car != NULL ) {
00019         if( last_car == NULL || last_car->position >= pending_car->speed + 2 ) {           
00020             pending_car->set_forward_car(last_car);
00021             pending_car->reset();
00022             active_cars = active_cars | pending_car->flag;
00023             
00024             last_car = pending_car;
00025             cars[num_cars] = pending_car;
00026             
00027             num_cars++;
00028             
00029             if(num_cars < MAX_CARS) {
00030                 pending_car = new AccCar(num_cars + 5 * (this->roadId - 1), this, pow(2, num_cars));
00031                 pending_car->set_target_speed(rand() % 11 + 5);
00032                 
00033                 next_release = time + rand() % 3;
00034             } else {
00035                 pending_car = NULL;   
00036             }
00037             
00038             return last_car->id;
00039         }
00040     }
00041     
00042     return -1;
00043 }
00044  
00045  void Road::let_cars_update() {
00046      if( active_cars > 0x00 ) {
00047         go_flags.set(active_cars);
00048      }
00049  }
00050  
00051  void Road::wait_for_car_update() {
00052      if( active_cars > 0x00 ) {
00053         done_flags.wait_all(active_cars);
00054      }
00055  }
00056  
00057  void Road::check_exit_cars() {     
00058      for( int i=0; i < num_cars; i++ ) {
00059          if(this->cars[i]->position >= 100 ) {            
00060             active_cars = active_cars ^ this->cars[i]->flag;
00061             
00062             this->cars[i]->position = -1;
00063             this->cars[i]->speed = -1;
00064          }
00065      }     
00066  }
00067  
00068  void Road::print_status() {
00069      for( int i=0; i < num_cars; i++ ) {
00070          printf("Car %d on road %d: %d -> %d\r\n", cars[i]->id, this->roadId, cars[i]->position, cars[i]->speed); 
00071      }   
00072  }
00073  
00074 void Road::intendToEnter(int carId) {
00075     intersection->intendToEnter(carId, this->roadId); 
00076 }