so_sources.c

#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"

/*
 *Handler di SIGALRM or other signals;
 **/
void handle_signal(int signal);

int main(int argc, char const* argv[])
{
    struct message msgToSend;
    struct condivisa* sharedStruct = (struct condivisa*)malloc(sizeof(struct condivisa));
    struct sigaction sa;
    signal(SIGALRM, handle_signal);
    signal(SIGILL, handle_signal);

    int msgId = 0, shmId = 0;
    msgToSend.xSource = atoi(argv[1]);
    msgToSend.ySource = atoi(argv[2]);
    msgToSend.xDestination = 0;
    msgToSend.yDestination = 0;
    msgId = getMsgId(MESSAGE_QUEUE_KEY);
    /*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_DESTINATION;
    int msg_length = sizeof(msgToSend.xSource) * 4;
    int randrow = 0;
    int randcol = 0, randNum;
    alarm(getRandomNumberInRange(1, 5));
    while (1) {
        do {
            generateRowAndCol(&randrow, &randcol, SO_HEIGHT, SO_WIDTH);
        } while (sharedStruct->cityMap[randrow][randcol].tipoCella == HOLE || (msgToSend.xSource == randrow && msgToSend.ySource == randcol));
        msgToSend.xDestination = randrow;
        msgToSend.yDestination = randcol;
        /*now sending the message */
        msgsnd(msgId, &msgToSend, msg_length, 0);
        printf(ANSI_COLOR_MAGENTA "SO_SOURCE" ARROWRIGHT ANSI_COLOR_YELLOW "  (PID=%d): Q_id=%d: type=%ld |xSource= %d -  ySource= %d| " ARROWRIGHT "  |xDestination= %d -  yDestination= %d| SENT\n",
            getpid(), msgId, msgToSend.mtype, msgToSend.xSource, msgToSend.ySource, msgToSend.xDestination, msgToSend.yDestination);

        pause();
    }

    return 0;
}

void handle_signal(int signal)
{
    if (signal == SIGALRM) {
        printf(ANSI_COLOR_MAGENTA "SO_SOURCE" ARROWRIGHT ANSI_COLOR_BLUE "  SIGALARM received  waking up and sending message...\n");
        alarm(getRandomNumberInRange(1, 5));
    }
    else if (signal == SIGILL) {
        printf(ANSI_COLOR_MAGENTA "SO_SOURCE" ARROWRIGHT ANSI_COLOR_BLUE "  SIGILL received  waking up and sending message...\n");
        alarm(getRandomNumberInRange(1, 5));
    }
}