diff options
Diffstat (limited to 'include/linux/sem.h')
| -rw-r--r-- | include/linux/sem.h | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/include/linux/sem.h b/include/linux/sem.h index 6f6677a64..234d4eebf 100644 --- a/include/linux/sem.h +++ b/include/linux/sem.h @@ -60,11 +60,11 @@ struct seminfo { int semaem; }; -#define SEMMNI 128 /* ? max # of semaphore identifiers */ -#define SEMMSL 32 /* <= 512 max num of semaphores per id */ -#define SEMMNS (SEMMNI*SEMMSL) /* ? max # of semaphores in system */ -#define SEMOPM 32 /* ~ 100 max num of ops per semop call */ -#define SEMVMX 32767 /* semaphore maximum value */ +#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 */ /* unused */ #define SEMUME SEMOPM /* max num of undo entries per process */ @@ -81,15 +81,16 @@ struct sem { int sempid; /* pid of last operation */ }; -/* One queue for each semaphore set in the system. */ +/* One queue for each sleeping process 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 */ - wait_queue_head_t sleeper; /* sleeping process */ + struct task_struct* sleeper; /* this 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 */ + int id; /* internal sem id */ struct sembuf * sops; /* array of pending operations */ int nsops; /* number of operations */ int alter; /* operation will alter semaphore */ |