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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495/* 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 0x1000 /* undo the operation on exit */
/* semctl Command Definitions. */#define GETPID 11 /* get sempid */#define GETVAL 12 /* get semval */#define GETALL 13 /* get all semval's */#define GETNCNT 14 /* get semncnt */#define GETZCNT 15 /* get semzcnt */#define SETVAL 16 /* set semval */#define SETALL 17 /* set all semval's */
/* ipcs ctl cmds */#define SEM_STAT 18#define SEM_INFO 19#define SEM_STAT_ANY 20
/* Obsolete, used only for backwards compatibility and libc5 compiles */struct semid_ds { struct ipc_perm sem_perm; /* permissions .. see ipc.h */ __kernel_old_time_t sem_otime; /* last semop time */ __kernel_old_time_t sem_ctime; /* create/last semctl() time */ struct sem *sem_base; /* ptr to first semaphore in array */ struct sem_queue *sem_pending; /* pending operations to be processed */ struct sem_queue **sem_pending_last; /* last pending operation */ struct sem_undo *undo; /* undo requests on this array */ unsigned short sem_nsems; /* no. of semaphores in array */};
/* Include the definition of semid64_ds */#include <asm/sembuf.h>
/* semop system calls takes an array of these. */struct sembuf { unsigned short sem_num; /* semaphore index in array */ short sem_op; /* semaphore operation */ short sem_flg; /* operation flags */};
/* arg for semctl system calls. */union semun { int val; /* value for SETVAL */ struct semid_ds __user *buf; /* buffer for IPC_STAT & IPC_SET */ unsigned short __user *array; /* array for GETALL & SETALL */ struct seminfo __user *__buf; /* buffer for IPC_INFO */ void __user *__pad;};
struct seminfo { int semmap; int semmni; int semmns; int semmnu; int semmsl; int semopm; int semume; int semusz; int semvmx; int semaem;};
/* * 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 32000 /* <= IPCMNI max # of semaphore identifiers */#define SEMMSL 32000 /* <= INT_MAX max num of semaphores per id */#define SEMMNS (SEMMNI*SEMMSL) /* <= INT_MAX max # of semaphores in system */#define SEMOPM 500 /* <= 1 000 max num of ops per semop call */#define SEMVMX 32767 /* <= 32767 semaphore maximum value */#define SEMAEM SEMVMX /* adjust on exit max value */
/* unused */#define SEMUME SEMOPM /* max num of undo entries per process */#define SEMMNU SEMMNS /* num of undo structures system wide */#define SEMMAP SEMMNS /* # of entries in semaphore map */#define SEMUSZ 20 /* sizeof struct sem_undo */
#endif /* _UAPI_LINUX_SEM_H */