#define _LINUX_SEM_H
#include <linux/ipc.h>
-#include <asm/atomic.h>
/* semop flags */
#define SEM_UNDO 0x1000 /* undo the operation on exit */
#define SEMUSZ 20 /* sizeof struct sem_undo */
#ifdef __KERNEL__
+#include <asm/atomic.h>
+
+struct task_struct;
/* One semaphore structure for each semaphore in the system. */
struct sem {
/* One sem_array data structure for each set of semaphores in the system. */
struct sem_array {
struct kern_ipc_perm sem_perm; /* permissions .. see ipc.h */
+ int sem_id;
time_t sem_otime; /* last semop time */
time_t sem_ctime; /* last change time */
struct sem *sem_base; /* ptr to first semaphore in array */
int id; /* internal sem id */
struct sembuf * sops; /* array of pending operations */
int nsops; /* number of operations */
+ int alter; /* does the operation alter the array? */
};
/* Each task has a list of undo requests. They are executed automatically