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
12 struct workqueue_struct;
13
14 struct 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
23 struct 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
57 extern 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
62 extern void destroy_workqueue(struct workqueue_struct *wq);
63
64 extern int FASTCALL(queue_work(struct workqueue_struct *wq, struct work_struct *work));
65 extern int FASTCALL(queue_delayed_work(struct workqueue_struct *wq, struct work_struct *work, unsigned long delay));
66 extern int queue_delayed_work_on(int cpu, struct workqueue_struct *wq,
67 struct work_struct *work, unsigned long delay);
68 extern void FASTCALL(flush_workqueue(struct workqueue_struct *wq));
69
70 extern int FASTCALL(schedule_work(struct work_struct *work));
71 extern int FASTCALL(schedule_delayed_work(struct work_struct *work, unsigned long delay));
72
73 extern int schedule_delayed_work_on(int cpu, struct work_struct *work, unsigned long delay);
74 extern int schedule_on_each_cpu(void (*func)(void *info), void *info);
75 extern void flush_scheduled_work(void);
76 extern int current_is_keventd(void);
77 extern int keventd_up(void);
78
79 extern void init_workqueues(void);
80 void cancel_rearming_delayed_work(struct work_struct *work);
81 void cancel_rearming_delayed_workqueue(struct workqueue_struct *,
82 struct work_struct *);
83 int 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 */
cancel_delayed_work(struct work_struct * work)91 static 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