#ifndef _LINUX_SEM_H #define _LINUX_SEM_H #include <linux/atomic.h> #include <linux/rcupdate.h> #include <linux/cache.h> #include <uapi/linux/sem.h> struct task_struct; /* One sem_array data structure for each set of semaphores in the system. */ struct sem_array { struct kern_ipc_perm ____cacheline_aligned_in_smp sem_perm; /* permissions .. see ipc.h */ time_t sem_otime; /* last semop time */ time_t sem_ctime; /* last change time */ struct sem *sem_base; /* ptr to first semaphore in array */ struct list_head sem_pending; /* pending operations to be processed */ struct list_head list_id; /* undo requests on this array */ int sem_nsems; /* no. of semaphores in array */ int complex_count; /* pending complex operations */ }; #ifdef CONFIG_SYSVIPC struct sysv_sem { struct sem_undo_list *undo_list; }; extern int copy_semundo(unsigned long clone_flags, struct task_struct *tsk); extern void exit_sem(struct task_struct *tsk); #else struct sysv_sem { /* empty */ }; static inline int copy_semundo(unsigned long clone_flags, struct task_struct *tsk) { return 0; } static inline void exit_sem(struct task_struct *tsk) { return; } #endif #endif /* _LINUX_SEM_H */