semafor

#include <stdio.h>
#include <windows.h>
#include <time.h>
#include <conio.h>


#define M 1         // frizieru kresls
#define N 3         // kresli klientiem
#define BUSY_TIME 5     // 5 intervali katram klientam
#define SPAWN_CHANCE 5      // iespeja, kaa ienaaks jauns klients

//  iespejami statusi
enum tstate { ST_NOTHING, ST_WAITING, ST_ACTIVE };

//  klients
typedef struct {
    tstate state;
} tclient;

//  frizieris
typedef struct {
    tstate state;
    int busytim;
} thairdresser;

int main()
{
    tclient clients[N];
    thairdresser hairdresser;

    srand(time(0));
    int i, k, occupied = 0;

    //  visiem klientiem pieskiram statusu ST_NOTHING
    for (i = 0; i <= N - 1; i++) {
    clients[i].state = ST_NOTHING;
    }
    hairdresser.state = ST_NOTHING;

    printf("Uzspiediet jebkuru pogu, lai izietunn");
    while (!kbhit()) {
    // Ja frizieris tiko pabeidz darbu///
    if (hairdresser.state == ST_WAITING) {
        if (occupied > 0) { //vismaz viens klients gaida
        clients[0].state = ST_ACTIVE;   // frizieris pienem primo klientu
        hairdresser.state = ST_ACTIVE;  // frizieris aiznemts
        hairdresser.busytim = BUSY_TIME;    // timer
        } else {
        hairdresser.state = ST_NOTHING; // ja neviena nav aizet gulet
        }
    }
    // parbaudam, vai frizieris stradaaja
    if (hairdresser.busytim > 0) {  // parbaudam, vai frizieris pabeidza darbu
        hairdresser.busytim -= 1;
        if (hairdresser.busytim == 0) { // pabeidza darbu
        for (int i = 0; i < N - 1; i++) {   // apmierinats klients aiziet, masiva nobide
            clients[i] = clients[i + 1];
        }
        clients[N - 1].state = ST_NOTHING;
        occupied -= 1;  // atbrivojam vietu
        printf("Klients apkalpots, frizieris aizies uz istabu Wn");

        hairdresser.state = ST_WAITING; // frizieris aizies uz istabu W
        }
    }
    // Atnaak klients (vai neatnaak)
    k = rand() % SPAWN_CHANCE;
    if (k == SPAWN_CHANCE - 1) {
        if (occupied < N) { // Ir brivas vietas;
        occupied += 1;
        printf("Atnak klients uz %i. vietun", occupied);
        if (hairdresser.state == ST_NOTHING) {  // Ja frizieris gul tad celam vinu
            hairdresser.state = ST_ACTIVE;
            hairdresser.busytim = BUSY_TIME;
            clients[occupied - 1].state = ST_ACTIVE;
        } else {
            clients[occupied - 1].state = ST_WAITING;
        }
        } else
        printf("Klients atnaak, bet nav vietun");
    } else
        printf("Neviens nenaak...n");

    //  Izvadam informaciju par klienta stavokli
    for (i = 0; i <= N - 1; i++) {
        if (clients[i].state == ST_NOTHING) {
        printf("%d: tukss | ", i);
        } else if (clients[i].state == ST_WAITING) {
        printf("%d: gaida | ", i);
        } else if (clients[i].state == ST_ACTIVE) {
        printf("%d: cirpt matus | ", i + 1);
        }
    }
    printf("n");

    //  Izvadam informaciju par friziera stavokli
    if (hairdresser.state == ST_NOTHING) {
        printf("Frizieris: guln");
    } else if (hairdresser.state == ST_WAITING) {
        printf("Frizieris: aizej uz Wn");
    } else if (hairdresser.state == ST_ACTIVE) {
        printf("Frizieris: strada (%i)n", hairdresser.busytim);
    }
    printf("---------------------------------------------");
    Sleep(1000);
    }
    system("pause");
}