#ifndef _SYS_SHM_H #define _SYS_SHM_H 1 // https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_shm.h.html #include <sys/cdefs.h> __BEGIN_DECLS #define __need_pid_t #define __need_size_t #define __need_time_t #include <sys/types.h> #include <sys/ipc.h> #define SHM_RDONLY 0x01 #define SHM_RDONLY 0x02 #define SHM_RDONLY 0x04 typedef unsigned int shmatt_t; struct shmid_ds { struct ipc_perm shm_perm; /* Operation permission structure. */ size_t shm_segsz; /* Size of segment in bytes. */ pid_t shm_lpid; /* Process ID of last shared memory operation. */ pid_t shm_cpid; /* Process ID of creator. */ shmatt_t shm_nattch; /* Number of current attaches. */ time_t shm_atime; /* Time of last shmat(). */ time_t shm_dtime; /* Time of last shmdt(). */ time_t shm_ctime; /* Time of last change by shmctl().*/ }; void* shmat(int shmid, const void* shmaddr, int shmflg); int shmctl(int shmid, int cmd, struct shmid_ds* buf); int shmdt(const void* shmaddr); int shmget(key_t key, size_t size, int shmflg); __END_DECLS #endif