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| /* Shared variable */
typedef struct {
int road1; //Number of cars on the secondary road
int road2; //Number of cars on the primary road
} CarNumber;
CarNumber *carNumber;
/* variables used by several process */
pid_t pid;
int mutex = 1;
int fire = 0;
int end = 0;
int progTime;
Car *tab1, *tab2; // Waiting files that help us to schedule process
typedef struct GUI {
SDL_Surface *screen, *background, *redFire, *greenFire;
SDL_Rect *posBackground, *posFire1, *posFire2;
} *GUI;
/**********************************************************************
* Function that draw a car on the screen
**********************************************************************/
void drawCar (GUI gui, Car const c) {
SDL_BlitSurface(c -> image, NULL, gui -> screen, c -> position);
}
void initGui (GUI gui) {
SDL_Init(SDL_INIT_VIDEO);
gui -> screen = SDL_SetVideoMode(500, 500, 32, SDL_HWSURFACE);
gui -> background = SDL_LoadBMP("images/imagefond.bmp");
gui -> redFire = SDL_LoadBMP("images/feurouge.bmp");
gui -> greenFire = SDL_LoadBMP("images/feuvert.bmp");
SDL_SetColorKey(gui -> redFire, SDL_SRCCOLORKEY, SDL_MapRGB(gui -> redFire->format, 255, 255, 255));
SDL_SetColorKey(gui -> greenFire, SDL_SRCCOLORKEY, SDL_MapRGB(gui -> greenFire->format, 255, 255, 255));
gui -> posBackground -> x = 0;
gui -> posBackground -> y = 0;
gui -> posFire1 -> x = 0;
gui -> posFire1 -> y = 180;
gui -> posFire2 -> x = 0;
gui -> posFire2 -> y = 280;
}
void drawGui (GUI gui, int nbCars1, int nbCars2, int fire1, int fire2) {
int i;
SDL_BlitSurface(gui -> background, NULL, gui -> screen, gui -> posBackground);
if (fire1 == 0) SDL_BlitSurface(gui -> redFire, NULL, gui -> screen, gui -> posFire1);
else if (fire1 == 1) SDL_BlitSurface(gui -> greenFire, NULL, gui -> screen, gui -> posFire1);
if (fire2 == 0) SDL_BlitSurface(gui -> redFire, NULL, gui -> screen, gui -> posFire2);
else if (fire2 == 1) SDL_BlitSurface(gui -> greenFire, NULL, gui -> screen, gui -> posFire2);
for (i = 0; i < nbCars1; i++) {
drawCar(gui, tab1[i]);
}
for (i = 0; i < nbCars2; i++) {
drawCar(gui, tab2[i]);
}
SDL_Flip(gui -> screen);
}
/**********************************************************************
* cars' process
**********************************************************************/
void car(int roadNumber, int id) {
Car c = malloc (sizeof (Car*));
c -> id = id;
c -> position -> x = 0; c -> position -> y = 0;
c -> image = SDL_LoadBMP("images/bleu.bmp");
SDL_SetColorKey(c -> image, SDL_SRCCOLORKEY, SDL_MapRGB(c -> image ->format, 255, 255, 255));
P(mutex);
printf("\tVOITURE : arrivée de la voiture %d sur la voie %d\n", id, roadNumber);
if (roadNumber == 1) {
carNumber->road1++;
tab1[carNumber->road1-1] = c;
}
else {
carNumber->road2++;
tab2[carNumber->road2-1] = c;
}
printf("\tVOITURE : la voiture %d attend le feu\n", id);
if (roadNumber == 1)
printf("\tVOITURE : il y a %d voitures en attente\n", carNumber->road1);
else
printf("\tVOITURE : il y a %d voitures en attente\n", carNumber->road2);
V(mutex);
P(fire);
}
/**********************************************************************
* fires' process
**********************************************************************/
void fires(int roadNumber, int t) {
while (end != 1) {
int k;
printf("CARREFOUR : Le feu %d passe au rouge\n", roadNumber);
sleep(t);
V(fire);
printf("CARREFOUR : Le feu %d passe au vert\n", roadNumber);
sortTable (tab1, carNumber->road1);
sortTable (tab2, carNumber->road2);
if (roadNumber == 1){
printf("CARREFOUR : On libère %d voitures\n", carNumber->road1);
for (k = 0; k < carNumber->road1; k++)
printf("\tVOITURE : la voiture %d est passée\n", tab1[k] -> id);
}
else {
printf("CARREFOUR : On libère %d voitures\n", carNumber->road2);
for (k = 0; k < carNumber->road2; k++)
printf("\tVOITURE : la voiture %d est passée\n", tab2[k] -> id);
}
P(mutex);
if (roadNumber == 1){
carNumber->road1 = 0;
}
else {
carNumber->road2 = 0;
}
V(mutex);
sleep(t);
}
}
/**********************************************************************
* programm's time
**********************************************************************/
void programmTime () {
GUI gui;
initGui (gui);
while (end == 0) {
drawGui (gui, carNumber->road1, carNumber->road2, 1, 0);
progTime++;
printf("Programm's time%d\n", progTime);
sleep (1);
}
}
/**********************************************************************
* Main function
**********************************************************************/
int main (int nArg, char **args) {
char *filename = NULL;
int paramA = 0, paramN = CARSNUMBER, paramT;
int automatic = 0;
//Entry verification
if (entryVerification (nArg, args, ¶mA, ¶mN, ¶mT, &filename) == -1 || nArg > 7) {
printUsage ();
return 1;
}
//Case of a configuration file
if (filename != NULL) {
int n;
char **args2 = str_split (loadParam (filename, &n), " ");
if (entryVerification (n, args2, ¶mA, ¶mN, ¶mT, &filename) == -1) {
printUsage ();
return 1;
}
//printf("n = %d, command = %s, chaine = %s, p1 = %d, %d, %d\n", n, args2[2], loadParam (filename, &n), paramA, paramN, paramT);
}
int key, kMutex, kFire;
pid_t pidFire1, pidFire2, pidCar, p;
key = ftok("/etc/passwd",0);
carNumber = (CarNumber*)shmalloc(key,sizeof(CarNumber));
tab1 = (Car*)shmalloc(key+1,sizeof(Car)*100);
tab2 = (Car*)shmalloc(key+2,sizeof(Car)*100);
if (!carNumber || !tab1 || !tab2) {
fprintf(stderr, "erreur de creation de memoire partagee\n");
return 1;
}
/* Shared area initialisation */
carNumber->road1 = 0; /* There is no car on the secondary road at beginning */
carNumber->road2 = 0; /* There is no car on the primary road at beginning */
/* semaphore mutex's creation */
kMutex = key+1;
mutex = mutalloc(kMutex);
if (mutex == -1) {
fprintf(stderr, "erreur de creation de semaphore\n");
shmfree(key);
return 2;
}
/* semaphore fire's creation */
kFire = key+2;
fire = semalloc(kFire,0);
if (fire == -1) {
fprintf(stderr, "erreur de creation de semaphore\n");
shmfree(key);
mutfree(kMutex);
return 2;
}
//Programm's time
switch (pid=fork()) {
case -1: perror("Creation de processus");
return 3;
case 0:
/************************************/
/* process child 1 : Programm's time */
programmTime ();
return 0;
}
//Secondary road's process
switch (pid=fork()) {
case -1: perror("Creation de processus");
return 3;
case 0:
/************************************/
/* process child 2 : Secondary road */
fires(1, paramT);
return 0;
}
pidFire1 = pid;
//Primary road's process
switch (pid=fork()) {
case -1: perror("Creation de processus");
return 3;
case 0:
/************************************/
/* process child 3 : Primary road */
fires(2, 2 * paramT);
return 0;
}
pidFire2 = pid;
/************************************/
/* Cars' process */
//Automatic mode
if (paramA != 0) {
int i;
for (i = 1; i <= paramN; i++) {
switch (pid = fork()) {
case -1: perror("Creation de processus");
return 3;
case 0:
/**********************************/
/* process child i : Car i */
srandom (pid);
car(random () % 2 + 1, i);
return 0;
}
}
}
else { // Interactive mode
int i = 1;
char c;
switch (p = fork()) {
case -1: perror("Creation de processus");
return 3;
case 0:
while (1) {
c = mygetchar();
if (c == 'q') {
return 0;
}
if (c == 'k'){//If k touch is typed, a car is generated on the secondary road
switch (pid=fork()) {
case -1: perror("Creation de processus");
return 3;
case 0:
/**********************************/
/* pprocess child i : Car i */
car(1, i);
return 0;
}
}
else if (c == 'l') { //If l touch is typed, a car is generated o, the primary road
switch (pid=fork()) {
case -1: perror("Creation de processus");
return 3;
case 0:
/**********************************/
/* process child i : Car i */
car(2, i);
return 0;
}
}
i++;
bzero(&c, sizeof(c));
}
return 0;
}
}
end = 1;
/******************/
/* Father process */
/* attente du Fire pour sortir : permet de tuer les fils en meme temps que le pere sur un ^C */
waitpid(pid,0,0);
puts("PERE : fin du pere");
/* recuperation IPC */
printf("PERE : destruction memoire partagee et semaphores: %d\n", shmfree(key) + mutfree(mutex) + semfree(fire));
return 0; |
