#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/sem.h>
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#include <sys/shm.h>
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#include "binary_sems.h" /* Declares our binary semaphore functions */
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#include "mm.h" /* Declares our binary semaphore functions */
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#define SEM_KEY 0x5678
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#define OBJ_PERMS (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP)
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/* Two semaphores are used to ensure exclusive, alternating access
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to the shared memory segment */
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#define WRITE_SEM 0 /* Writer has access to shared memory */
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#define READ_SEM 1 /* Reader has access to shared memory */
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struct Item
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{
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int pic;
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int info;
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};
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