include/linux/wait.h

18650 #ifndef _LINUX_WAIT_H
18651 #define _LINUX_WAIT_H
18652 
18653 #define WNOHANG         0x00000001
18654 #define WUNTRACED       0x00000002
18655 
18656 #define __WCLONE        0x80000000
18657 
18658 #ifdef __KERNEL__
18659 
18660 #include <asm/page.h>
18661 
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18662 struct wait_queue {
18663   struct task_struct * task;
18664   struct wait_queue * next;
18665 };
18666 
18667 #define WAIT_QUEUE_HEAD(x) ((struct wait_queue *)((x)-1))
18668 
18669 static inline void init_waitqueue(struct wait_queue **q)
18670 {
18671   *q = WAIT_QUEUE_HEAD(q);
18672 }
18673 
18674 static inline int waitqueue_active(struct wait_queue **q)
18675 {
18676   struct wait_queue *head = *q;
18677   return head && head != WAIT_QUEUE_HEAD(q);
18678 }
18679 
18680 #endif /* __KERNEL__ */
18681 
18682 #endif