1/*
2 * workqueue.h --- work queue handling for Linux.
3 */
4
5#ifndef _LINUX_WORKQUEUE_H
6#define _LINUX_WORKQUEUE_H
7
8#include <linux/timer.h>
9#include <linux/linkage.h>
10#include <linux/bitops.h>
11
12struct workqueue_struct;
13
14struct work_struct {
15	unsigned long pending;
16	struct list_head entry;
17	void (*func)(void *);
18	void *data;
19	void *wq_data;
20	struct timer_list timer;
21};
22
23struct execute_work {
24	struct work_struct work;
25};
26
27#define __WORK_INITIALIZER(n, f, d) {				\
28        .entry	= { &(n).entry, &(n).entry },			\
29	.func = (f),						\
30	.data = (d),						\
31	.timer = TIMER_INITIALIZER(NULL, 0, 0),			\
32	}
33
34#define DECLARE_WORK(n, f, d)					\
35	struct work_struct n = __WORK_INITIALIZER(n, f, d)
36
37/*
38 * initialize a work-struct's func and data pointers:
39 */
40#define PREPARE_WORK(_work, _func, _data)			\
41	do {							\
42		(_work)->func = _func;				\
43		(_work)->data = _data;				\
44	} while (0)
45
46/*
47 * initialize all of a work-struct:
48 */
49#define INIT_WORK(_work, _func, _data)				\
50	do {							\
51		INIT_LIST_HEAD(&(_work)->entry);		\
52		(_work)->pending = 0;				\
53		PREPARE_WORK((_work), (_func), (_data));	\
54		init_timer(&(_work)->timer);			\
55	} while (0)
56
57extern struct workqueue_struct *__create_workqueue(const char *name,
58						    int singlethread);
59#define create_workqueue(name) __create_workqueue((name), 0)
60#define create_singlethread_workqueue(name) __create_workqueue((name), 1)
61
62extern void destroy_workqueue(struct workqueue_struct *wq);
63
64extern int FASTCALL(queue_work(struct workqueue_struct *wq, struct work_struct *work));
65extern int FASTCALL(queue_delayed_work(struct workqueue_struct *wq, struct work_struct *work, unsigned long delay));
66extern int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
67	struct work_struct *work, unsigned long delay);
68extern void FASTCALL(flush_workqueue(struct workqueue_struct *wq));
69
70extern int FASTCALL(schedule_work(struct work_struct *work));
71extern int FASTCALL(schedule_delayed_work(struct work_struct *work, unsigned long delay));
72
73extern int schedule_delayed_work_on(int cpu, struct work_struct *work, unsigned long delay);
74extern int schedule_on_each_cpu(void (*func)(void *info), void *info);
75extern void flush_scheduled_work(void);
76extern int current_is_keventd(void);
77extern int keventd_up(void);
78
79extern void init_workqueues(void);
80void cancel_rearming_delayed_work(struct work_struct *work);
81void cancel_rearming_delayed_workqueue(struct workqueue_struct *,
82				       struct work_struct *);
83int execute_in_process_context(void (*fn)(void *), void *,
84			       struct execute_work *);
85
86/*
87 * Kill off a pending schedule_delayed_work().  Note that the work callback
88 * function may still be running on return from cancel_delayed_work().  Run
89 * flush_scheduled_work() to wait on it.
90 */
91static inline int cancel_delayed_work(struct work_struct *work)
92{
93	int ret;
94
95	ret = del_timer_sync(&work->timer);
96	if (ret)
97		clear_bit(0, &work->pending);
98	return ret;
99}
100
101#endif
102