1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
|
#ifndef _LINUX_WAIT_H
#define _LINUX_WAIT_H
#define WNOHANG 0x00000001
#define WUNTRACED 0x00000002
#define __WALL 0x40000000 /* Wait on all children, regardless of type */
#define __WCLONE 0x80000000 /* Wait only on non-SIGCHLD children */
#ifdef __KERNEL__
#include <asm/page.h>
struct wait_queue {
struct task_struct * task;
struct wait_queue * next;
};
typedef struct wait_queue wait_queue_t;
typedef struct wait_queue *wait_queue_head_t;
#define WAIT_QUEUE_HEAD(x) ((struct wait_queue *)((x)-1))
#define DECLARE_WAITQUEUE(wait, current) struct wait_queue wait = { current, NULL }
#define DECLARE_WAIT_QUEUE_HEAD(wait) wait_queue_head_t wait
#define init_waitqueue_head(x) *(x)=NULL
#define init_waitqueue_entry(q,p) ((q)->task)=(p)
static inline void init_waitqueue(struct wait_queue **q)
{
*q = WAIT_QUEUE_HEAD(q);
}
static inline int waitqueue_active(struct wait_queue **q)
{
struct wait_queue *head = *q;
return head && head != WAIT_QUEUE_HEAD(q);
}
#endif /* __KERNEL__ */
#endif
|
