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53 lines
1.3 KiB
53 lines
1.3 KiB
#ifndef _LINUX_SEM_H |
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#define _LINUX_SEM_H |
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#include <linux/atomic.h> |
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#include <linux/rcupdate.h> |
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#include <linux/cache.h> |
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#include <uapi/linux/sem.h> |
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struct task_struct; |
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/* One sem_array data structure for each set of semaphores in the system. */ |
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struct sem_array { |
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struct kern_ipc_perm ____cacheline_aligned_in_smp |
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sem_perm; /* permissions .. see ipc.h */ |
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time_t sem_ctime; /* last change time */ |
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struct sem *sem_base; /* ptr to first semaphore in array */ |
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struct list_head pending_alter; /* pending operations */ |
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/* that alter the array */ |
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struct list_head pending_const; /* pending complex operations */ |
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/* that do not alter semvals */ |
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struct list_head list_id; /* undo requests on this array */ |
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int sem_nsems; /* no. of semaphores in array */ |
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int complex_count; /* pending complex operations */ |
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bool complex_mode; /* no parallel simple ops */ |
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} __randomize_layout; |
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#ifdef CONFIG_SYSVIPC |
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struct sysv_sem { |
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struct sem_undo_list *undo_list; |
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}; |
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extern int copy_semundo(unsigned long clone_flags, struct task_struct *tsk); |
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extern void exit_sem(struct task_struct *tsk); |
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#else |
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struct sysv_sem { |
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/* empty */ |
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}; |
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static inline int copy_semundo(unsigned long clone_flags, struct task_struct *tsk) |
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{ |
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return 0; |
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} |
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static inline void exit_sem(struct task_struct *tsk) |
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{ |
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return; |
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} |
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#endif |
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#endif /* _LINUX_SEM_H */
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