76 lines
1.3 KiB
C
76 lines
1.3 KiB
C
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#include <sys/types.h>
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#include <sys/shm.h>
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#include <sys/ipc.h>
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#include <errno.h>
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#include <time.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "semtools.h"
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typedef struct
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{
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float temp;
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int press;
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char ordre;
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} uneStruct;
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char randomC()
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{
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return ((char)126.0*(rand()/(RAND_MAX+0.1)));
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}
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int main()
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{
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uneStruct *memShare;
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int shmid;
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key_t clef;
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void *shm;
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clef = ftok("/tmp/bidon", 5678);
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shmid = shmget(clef, sizeof(uneStruct), 0666);
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if(shmid < 0)
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{
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perror("Erreur shmget");
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exit(EXIT_FAILURE);
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}
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//debut sem
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id_sem = semget (5678, 1, IPC_CREAT | 0600);
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if (id_sem == -1)
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{
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printf("Probleme semget : %s\n", strerror(errno));
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if(errno != EEXIST)
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{
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exit(errno);
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}
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}
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if(fixe_valeursem() == 0)
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{
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exit(0);
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}
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//fin init sem
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memShare = shmat(shmid, NULL, 0);
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while(1)
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{
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if(P() == 1)
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{
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memShare->ordre = randomC();
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printf("Memoire mise a jour.\nVal->\n\tordre : %c\n\n", memShare->ordre);
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if(V() == 0)
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{
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exit(EXIT_FAILURE);
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}
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}
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else
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{
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exit(EXIT_FAILURE);
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}
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usleep(999999);
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}
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}
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