banan-os/userspace/libraries/LibC/include/sys/shm.h

43 lines
1.0 KiB
C

#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