linux/include/uapi/linux/sem.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_LINUX_SEM_H
#define _UAPI_LINUX_SEM_H

#include <linux/ipc.h>

/* semop flags */
#define SEM_UNDO …

/* semctl Command Definitions. */
#define GETPID …
#define GETVAL …
#define GETALL …
#define GETNCNT …
#define GETZCNT …
#define SETVAL …
#define SETALL …

/* ipcs ctl cmds */
#define SEM_STAT …
#define SEM_INFO …
#define SEM_STAT_ANY …

/* Obsolete, used only for backwards compatibility and libc5 compiles */
struct semid_ds { … };

/* Include the definition of semid64_ds */
#include <asm/sembuf.h>

/* semop system calls takes an array of these. */
struct sembuf { … };

/* arg for semctl system calls. */
semun;

struct  seminfo { … };

/*
 * SEMMNI, SEMMSL and SEMMNS are default values which can be
 * modified by sysctl.
 * The values has been chosen to be larger than necessary for any
 * known configuration.
 *
 * SEMOPM should not be increased beyond 1000, otherwise there is the
 * risk that semop()/semtimedop() fails due to kernel memory fragmentation when
 * allocating the sop array.
 */


#define SEMMNI …
#define SEMMSL …
#define SEMMNS …
#define SEMOPM …
#define SEMVMX …
#define SEMAEM …

/* unused */
#define SEMUME …
#define SEMMNU …
#define SEMMAP …
#define SEMUSZ …


#endif /* _UAPI_LINUX_SEM_H */