diff options
Diffstat (limited to 'mdk-stage1/dietlibc/include/sys/sem.h')
| -rw-r--r-- | mdk-stage1/dietlibc/include/sys/sem.h | 74 |
1 files changed, 72 insertions, 2 deletions
diff --git a/mdk-stage1/dietlibc/include/sys/sem.h b/mdk-stage1/dietlibc/include/sys/sem.h index cc182649c..ad16b5f53 100644 --- a/mdk-stage1/dietlibc/include/sys/sem.h +++ b/mdk-stage1/dietlibc/include/sys/sem.h @@ -1,11 +1,81 @@ #ifndef _SYS_SEM_H #define _SYS_SEM_H -#include <linux/sem.h> #include <sys/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 + +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 */ + unsigned short sem_nsems; /* no. of semaphores in array */ +}; + +/* 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 */ +}; + +/* please complain to the glibc goons for the following misbehaviour */ +#if 0 +/* arg for semctl system calls. */ +union semun { + int val; /* value for SETVAL */ + struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */ + unsigned short *array; /* array for GETALL & SETALL */ + struct seminfo *__buf; /* buffer for IPC_INFO */ + void *__pad; +}; +#endif +#define _SEM_SEMUN_UNDEFINED + +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 /* <= IPCMNI max # of semaphore identifiers */ +#define SEMMSL 250 /* <= 8 000 max num of semaphores per id */ +#define SEMMNS (SEMMNI*SEMMSL) /* <= INT_MAX max # of semaphores in system */ +#define SEMOPM 32 /* <= 1 000 max num of ops per semop call */ +#define SEMVMX 32767 /* <= 32767 semaphore maximum value */ + extern int semget( key_t key, int nsems, int semflg) __THROW; -extern int semctl(int semid, int semnum, int cmd, union semun arg) __THROW; + +/* The prototype really is: + * extern int semctl(int semid, int semnum, int cmd, union semun arg) __THROW; + * glibc bug compatibility forces us to write it like this: */ +extern int semctl(int semid, int semnum, int cmd, ...) __THROW; + extern int semop(int semid, struct sembuf *sops, unsigned nsops) __THROW; #endif |