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