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Studfiles2
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Файл:Лабораторная работа №42 / 4 / lab4_2
.cpp#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <iostream.h>
#include "l4.h"
int main()
{
Message *msgptr;
key_t key;
int shmid, semid;
key = ftok("server", 'A');
if((shmid=shmget(key, sizeof(Message), 0))==0)
{cout<<endl<<"Oshibka dostupa";exit(1);}
if((msgptr=(Message *)shmat(shmid,0,0))<0)
{cout<<endl<<"Oshibka prisoedinenia";exit(1);}
if((semid=semget(key, 2, PERM) < 0))
{
cout<<endl<<"Nevozmojno sozdat semafor";
exit(1);}
if(semop(semid, &mem_lock[0], 2)<0)
{cout<<endl<<"Nevozmojno vipolnit operaciu!";
exit(1);}
if(semop(semid, &proc_start[0], 1)<0)
{cout<<endl<<"Nevozmojno vipolnit operaciu!";
exit(1);}
sprintf(msgptr->buff, "Zdorova \n");
if(semop(semid, &mem_unlock[0], 1)<0)
{cout<<endl<<"Nevozmojno vipolnit operaciu!";
exit(1);}
if(semop(semid, &mem_lock[0], 2)<0)
{cout<<endl<<"Nevozmojno vipolnit operaciu!";
exit(1);}
if(shmdt(msgptr)<0)
{cout<<endl<<"Oshibka otkluchenia";exit(1);}
if(shmctl(shmid, IPC_RMID, 0)<0)
{cout<<endl<<"Nevozmojno udalit semafor!";exit(1);
}
if(semctl(semid, 0, IPC_RMID)<0)
{cout<<endl<<"Nevozmojno udalit semafor!";exit(1);}
exit(0);
}