jjj

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/file.h>
#include <sys/times.h>
#include <semaphore.h>
#define SIZE 9



int main()
{
    int potoki[2];
    int pipe_result;
    int bajty;
    char c;
    pid_t pid;
    int i;

    sem_t * emptyy;
    sem_t * full;
    sem_t * prod;
    sem_t * consread;
    sem_t * isreaden;
    sem_t * cons;

    emptyy= sem_open( "/emptyy", O_CREAT);
    sem_init( emptyy, 1, 9);

    full=sem_open("/full", O_CREAT);
    sem_init( full, 1, 0 );

    prod=sem_open( "/producer", O_CREAT);
    sem_init( prod, 1, 1 );

    consread=sem_open("/consread", O_CREAT);
    sem_init( consread, 1, 1 );

    isreaden=sem_open( "/isreaden", O_CREAT);
    sem_init( isreaden, 1, 1 );

    cons=sem_open( "/consumer", O_CREAT);
    sem_init( cons, 1 , 2 );

    pipe_result=pipe(potoki);
    if(pipe_result!=0)
    {
        exit(EXIT_FAILURE);
    }
    pid = fork();
    if(pid==-1)
    {
        exit(EXIT_FAILURE);
    }
    pid = fork();
    srand( time( NULL ) );
    if(pid==-1)
    {
        exit(EXIT_FAILURE);
    }
    if(pid==0)//producent
    {
        for(i=0; i<50; i++)
        {
            printf("dupa1");
            //produkuje
            c=65+(rand()%24);
            sem_wait( emptyy);
            sem_wait( prod);
            bajty = write(potoki[1], &c, 1);
            sem_post( full);
            sem_post(prod);

            usleep((rand()%20)*100);
        }
        exit(EXIT_SUCCESS);
    }
    else//czytelnik
    {


        for(i=0; i<50; i++)
        {
            printf("dupa1");
            sem_wait( cons);
            sem_wait( full);
            sem_wait( consread);
            if(sem_trywait( cons)==0 || sem_trywait( isreaden)!=0)
            {
                bajty = read(potoki[0], &c, 1);
                sem_post( emptyy);
                sem_post( isreaden);
            }
            else
            {
                bajty= pread(potoki[0], &c, 1, 0);
                sem_post( full);

            }
            sem_post(cons);
            usleep((rand()%20)*100);
        }
        exit(EXIT_SUCCESS);
    }
    sem_destroy(emptyy);
    sem_destroy(full);
    sem_destroy(prod);
    sem_destroy(cons);
    sem_destroy(consread);
    sem_destroy(isreaden);

}