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taxi.c
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taxi.c
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#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <time.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <math.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/msg.h>
#include "libs/utilities.h"
#include "libs/initialConfig.h"
#include "libs/ipc_utilities.h"
#include "libs/dijkstra.h"
/*int main(int argc, char const *argv[])
{
struct messageTaxi msgToSend;
struct condivisa *sharedStruct = (struct condivisa *)malloc(sizeof(struct condivisa));
int msgId = 0, shmId = 0, semId_Sync = 0;
msgId = getMsgId(MESSAGE_QUEUE_KEY);
semId_Sync = getSemaphoreId(SEM_SYNC_KEY, 2);
//Create a shared memory area
shmId = getSharedMemoryId(sharedStruct, SHM_KEY);
//Attach the shared memory to a pointer
sharedStruct = shmat(shmId, NULL, 0);
msgToSend.mtype = TYPE_TAXI_SUCCESS;
sem_unlock(semId_Sync, ID_KIDS_READY);
//printf(ANSI_COLOR_MAGENTA"SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN" PID=%d, Waiting for father!\n", getpid());
sem_lock(semId_Sync, ID_READY_GO);
int msg_length = sizeof(msgToSend.longhest_route_byTime) * 4 + sizeof(msgToSend.taxiPid);
msgToSend.taxiPid = getpid();
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, sending MSG of type %ld\n", getpid(), msgToSend.mtype);
msgsnd(msgId, &msgToSend, msg_length, 0);
return 0;
}*/
void movement(int rows , int cols , struct strada city_map[rows][cols], int sem_cell, coor start, coor stop, coor *taxi, int *route_cells, int *route_time);
void handle_signal(int signal);
int main(int argc, char const *argv[])
{
//printf("Printing values!\n");
struct coor taxi_coor;
struct message rcv_msg;
struct condivisa *shared_struct = (struct condivisa *)malloc(sizeof(struct condivisa));
struct sigaction sa;
//signal(SIGUSR1, handle_signal);
signal(SIGALRM, handle_signal);
int semId_Sync = getSemaphoreId(SEM_SYNC_KEY, SEM_LENGTH);
int sem_cell = getSemaphoreId(SEM_CELL_KEY, ( SO_HEIGHT * SO_WIDTH));
int msg_id = 0, shm_id = 0;
printf("%i,%i", atoi(argv[2]),atoi(argv[1]));
taxi_coor.x = atoi(argv[1]);
taxi_coor.y = atoi(argv[2]);
msg_id = getMsgId(MESSAGE_QUEUE_KEY);
/*Create a shared memory area */
shm_id = getSharedMemoryId(shared_struct, SHM_KEY);
/*Attach the shared memory to a pointer */
shared_struct = shmat(shm_id, NULL, 0);
long mtype = TYPE_DESTINATION;
int msg_length = sizeof(rcv_msg.xSource) * 4;
int num_bytes;
//stats
struct messageTaxi msg_stats;
int msg_snd_length = sizeof(msg_stats.longhest_route_byTime) * 4 + sizeof(msg_stats.taxiPid);
msg_stats.taxiPid = getpid();
msg_stats.longhest_route_byCell = 0;
msg_stats.longhest_route_byTime = 0;
int this_route_cells;
int this_route_time;
//blocco la cella in cui mi sono creato
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, entering cell (%d,%d) with capacity %i\n", getpid(), taxi_coor.y, taxi_coor.x, sem_get_val(sem_cell, shared_struct->cityMap[taxi_coor.y][taxi_coor.x].idCella));
sem_lock(sem_cell, shared_struct->cityMap[taxi_coor.x][taxi_coor.y].idCella);
//printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, i'm in cell (%d,%d) with capacity %i\n", getpid(), taxi_coor.y, taxi_coor.x, sem_get_val(sem_cell, shared_struct->cityMap[taxi_coor.y][taxi_coor.x].idCella));
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, operative on (%d,%d)\n", getpid(), taxi_coor.y, taxi_coor.x);
sem_unlock(semId_Sync, ID_KIDS_READY);
sem_lock(semId_Sync, ID_READY_GO);
while (1)
{
//VADO SU UNA SOURCE
//la cerco(le 8 celle attorno poi le 16 attorno alle 8 ecc...)
coor best_source;
int best_source_finded = 0, n = 1;
while (best_source_finded == 0)
{
for (int r = taxi_coor.x - n; r <= taxi_coor.x + n + 1; r++)
{
for (int c = taxi_coor.y - n; c <= taxi_coor.y + n + 1 && (SO_HEIGHT > r && r >= 0); c++)
{
if ((SO_WIDTH > c && c >= 0) && shared_struct->cityMap[r][c].tipoCella == SOURCE && best_source_finded == 0)
{
best_source.x = r;
best_source.y = c;
printf("%i,%i", best_source.x, best_source.y);
best_source_finded = 1;
}
}
}
n++;
}
//mi sposto verso la source
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, I go in source [%i,%i]\n", getpid(), best_source.x, best_source.y);
movement(SO_HEIGHT,SO_WIDTH,shared_struct->cityMap, sem_cell, taxi_coor, best_source, &taxi_coor, &this_route_cells, &this_route_time);
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, arrivato source\n", getpid());
//ricevo il messaggio
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, I'm listening\n", getpid());
int msg_find = 0;
coor start, stop;
while (msg_find == 0)
{
if(msgrcv(msg_id, &rcv_msg, msg_length, mtype, 0)!=-1){
printf("|%d| sono in [%d][%d]-[%d][%d] e cerco di prendere il messaggio\n",getpid(),rcv_msg.xSource,rcv_msg.ySource,best_source.x,best_source.y);
if (rcv_msg.xSource == best_source.x && rcv_msg.ySource == best_source.y) //se è un messaggio della mia source
{
//prendo info dal messaggio
start.x = rcv_msg.xSource;
start.y = rcv_msg.ySource;
stop.x = rcv_msg.xDestination;
stop.y = rcv_msg.yDestination;
msg_find = 1;
msg_stats.number_request++;
} else
{
//lo rimetto nella coda
msgsnd(msg_id, &rcv_msg, msg_snd_length, 0);
//printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " (PID=%d): Q_id=%d: type=%ld |xSource= %d - ySource= %d| " ARROWRIGHT " |xDestination= %d - yDestination= %d| SENT\n", getpid(), msg_id, rcv_msg.mtype, rcv_msg.xSource, rcv_msg.ySource, rcv_msg.xDestination, rcv_msg.yDestination);
}
}
}
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, msg_id=%d, msg_type=%ld ,new route=(%d,%d)to(%d,%d)\n", getpid(), msg_id, rcv_msg.mtype, rcv_msg.xSource, rcv_msg.ySource, rcv_msg.xDestination, rcv_msg.yDestination);
//mi muovo
this_route_cells = 0;
this_route_time = 0;
movement(SO_HEIGHT,SO_WIDTH,shared_struct->cityMap, sem_cell, start, stop, &taxi_coor, &this_route_cells, &this_route_time);
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, SONO ARRIVATO\n",getpid());
msg_stats.mtype = TYPE_TAXI_SUCCESS;
msgsnd(msg_id, &msg_stats, msg_length, 0);
//controllo semaforo cella
//semaforo libero
//mi sposto
//semaforo bloccato
//inizia timer attesa e mi fermo
//se timer finisce
//creo nuovo taxi
//mi uccido
//else
//mi sposto
}
return 0;
}
void handle_signal(int signal)
{
if (signal == SIGALRM)
{
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, I'm exploding...\n", getpid());
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, Creating my successor...\n", getpid());
//cambiare nellarray di pid dei taxi quello nuovo con quello corrente
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, Killing myself\n", getpid());
//invio messaggio al main per la stampa finale(mettere ricezione nel main)
//sem_unlock(sem_cell, city_map[taxi->x][taxi->y].idCella);
raise(SIGINT);
}
else if (signal == SIGINT)
{
}
}
void movement(int rows , int cols ,struct strada city_map[SO_HEIGHT][SO_WIDTH], int sem_cell, coor start, coor stop, coor *taxi, int *route_cells, int *route_time)
{
path my_path = NULL;
my_path = dijkstra(city_map, start, stop);
struct timespec time1, time2;
time1.tv_sec = 0;
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, Calculated path = ", getpid());
path_print(my_path);
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, I start in [%d,%d]\n", getpid(), my_path->my_coor.x, my_path->my_coor.y);
for (; my_path->next != NULL; my_path = my_path->next)
{
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, Entering cell (%d,%d) with capacity %i\n", getpid(), my_path->next->my_coor.x, my_path->next->my_coor.y, sem_get_val(sem_cell, city_map[my_path->next->my_coor.x][my_path->next->my_coor.y].idCella));
alarm(SO_TIMEOUT);
sem_lock(sem_cell, city_map[my_path->next->my_coor.x][my_path->next->my_coor.y].idCella);
sem_unlock(sem_cell, city_map[taxi->x][taxi->y].idCella);
city_map[taxi->x][taxi->y].numeroAttraversamenti++;
taxi->x = my_path->next->my_coor.x;
taxi->y = my_path->next->my_coor.y;
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, Leaving cell (%d,%d) with capacity %i\n", getpid(), taxi->x, taxi->y, sem_get_val(sem_cell, city_map[taxi->x][taxi->y].idCella));
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, I'm in cell (%d,%d) with capacity %i\n", getpid(), my_path->next->my_coor.x, my_path->next->my_coor.y, sem_get_val(sem_cell, city_map[my_path->next->my_coor.x][my_path->next->my_coor.y].idCella));
time1.tv_nsec = city_map[taxi->x][taxi->y].tempoDiAttraversamento;
printf(ANSI_COLOR_MAGENTA "SO_TAXI" ARROWRIGHT ANSI_COLOR_CYAN " PID=%d, I'm taking %li to cross\n", getpid(), city_map[taxi->x][taxi->y].tempoDiAttraversamento);
nanosleep(&time1, &time2);
*route_cells++;
}
//*route_time = 10;
printf("\n");
path_free(my_path);
}