chip 1
abc.com.pl 9
Kratochvil Stanisław Psychoterapia Kierunki metody badania (2)
174 11 (7)
CiemnoÂść w słońcu
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Eddings, Dav
abc.com.pl 7
MacDONALD, George The Princess and the Goblin
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.sem.c#ifndef _LINUX_SEM_H#define _LINUX_SEM_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 *//* One semid data structure for each set of semaphores in the system.*/struct semid_ds {struct ipc_perm 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 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 */ushort sem_nsems; /* no.of semaphores in array */};/* semop system calls takes an array of these.*/struct sembuf {ushort 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 *buf; /* buffer for IPC_STAT & IPC_SET */ushort *array; /* array for GETALL & SETALL */struct seminfo *__buf; /* buffer for IPC_INFO */void *__pad;};struct seminfo {int semmap;int semmni;int semmns;int semmnu;int semmsl;int semopm;int semume;int semusz;int semvmx;int semaem;};#define SEMMNI 128 /* ? max # of semaphore identifiers */#define SEMMSL 32 /* > 1) /* adjust on exit max value */#define SEMMAP SEMMNS /* # of entries in semaphore map */#define SEMUSZ 20 /* sizeof struct sem_undo */#ifdef __KERNEL__/* One semaphore structure for each semaphore in the system.*/struct sem {short semval; /* current value */short sempid; /* pid of last operation */};/* ipcs ctl cmds */#define SEM_STAT 18#define SEM_INFO 19/* One queue for each semaphore set in the system.*/struct sem_queue {struct sem_queue * next; /* next entry in the queue */struct sem_queue ** prev; /* previous entry in the queue, *(q->prev) == q */struct wait_queue * sleeper; /* sleeping process */struct sem_undo * undo; /* undo structure */int pid; /* process id of requesting process */int status; /* completion status of operation */struct semid_ds * sma; /* semaphore array for operations */struct sembuf * sops; /* array of pending operations */int nsops; /* number of operations */};/* Each task has a list of undo requests.They are executed automatically* when the process exits.*/struct sem_undo {struct sem_undo * proc_next; /* next entry on this process */struct sem_undo * id_next; /* next entry on this semaphore set */int semid; /* semaphore set identifier */short * semadj; /* array of adjustments, one per semaphore */};asmlinkage int sys_semget (key_t key, int nsems, int semflg);asmlinkage int sys_semop (int semid, struct sembuf *sops, unsigned nsops);asmlinkage int sys_semctl (int semid, int semnum, int cmd, union semun arg);#endif /* __KERNEL__ */#endif /* _LINUX_SEM_H */ [ Pobierz całość w formacie PDF ]
