81ddef77bb
This was unexported by Arjan because we have no current users. However, during a conversion from tasklets to workqueues of the parisc led functions, we ran across a case where this was needed. In particular, the open coded equivalent of cancel_rearming_delayed_workqueue was implemented incorrectly, which is, I think, all the evidence necessary that this is a useful API. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
|
|
* workqueue.h --- work queue handling for Linux.
|
|
*/
|
|
|
|
#ifndef _LINUX_WORKQUEUE_H
|
|
#define _LINUX_WORKQUEUE_H
|
|
|
|
#include <linux/timer.h>
|
|
#include <linux/linkage.h>
|
|
#include <linux/bitops.h>
|
|
|
|
struct workqueue_struct;
|
|
|
|
struct work_struct {
|
|
unsigned long pending;
|
|
struct list_head entry;
|
|
void (*func)(void *);
|
|
void *data;
|
|
void *wq_data;
|
|
struct timer_list timer;
|
|
};
|
|
|
|
#define __WORK_INITIALIZER(n, f, d) { \
|
|
.entry = { &(n).entry, &(n).entry }, \
|
|
.func = (f), \
|
|
.data = (d), \
|
|
.timer = TIMER_INITIALIZER(NULL, 0, 0), \
|
|
}
|
|
|
|
#define DECLARE_WORK(n, f, d) \
|
|
struct work_struct n = __WORK_INITIALIZER(n, f, d)
|
|
|
|
/*
|
|
* initialize a work-struct's func and data pointers:
|
|
*/
|
|
#define PREPARE_WORK(_work, _func, _data) \
|
|
do { \
|
|
(_work)->func = _func; \
|
|
(_work)->data = _data; \
|
|
} while (0)
|
|
|
|
/*
|
|
* initialize all of a work-struct:
|
|
*/
|
|
#define INIT_WORK(_work, _func, _data) \
|
|
do { \
|
|
INIT_LIST_HEAD(&(_work)->entry); \
|
|
(_work)->pending = 0; \
|
|
PREPARE_WORK((_work), (_func), (_data)); \
|
|
init_timer(&(_work)->timer); \
|
|
} while (0)
|
|
|
|
extern struct workqueue_struct *__create_workqueue(const char *name,
|
|
int singlethread);
|
|
#define create_workqueue(name) __create_workqueue((name), 0)
|
|
#define create_singlethread_workqueue(name) __create_workqueue((name), 1)
|
|
|
|
extern void destroy_workqueue(struct workqueue_struct *wq);
|
|
|
|
extern int FASTCALL(queue_work(struct workqueue_struct *wq, struct work_struct *work));
|
|
extern int FASTCALL(queue_delayed_work(struct workqueue_struct *wq, struct work_struct *work, unsigned long delay));
|
|
extern void FASTCALL(flush_workqueue(struct workqueue_struct *wq));
|
|
|
|
extern int FASTCALL(schedule_work(struct work_struct *work));
|
|
extern int FASTCALL(schedule_delayed_work(struct work_struct *work, unsigned long delay));
|
|
|
|
extern int schedule_delayed_work_on(int cpu, struct work_struct *work, unsigned long delay);
|
|
extern void flush_scheduled_work(void);
|
|
extern int current_is_keventd(void);
|
|
extern int keventd_up(void);
|
|
|
|
extern void init_workqueues(void);
|
|
void cancel_rearming_delayed_work(struct work_struct *work);
|
|
void cancel_rearming_delayed_workqueue(struct workqueue_struct *,
|
|
struct work_struct *);
|
|
|
|
/*
|
|
* Kill off a pending schedule_delayed_work(). Note that the work callback
|
|
* function may still be running on return from cancel_delayed_work(). Run
|
|
* flush_scheduled_work() to wait on it.
|
|
*/
|
|
static inline int cancel_delayed_work(struct work_struct *work)
|
|
{
|
|
int ret;
|
|
|
|
ret = del_timer_sync(&work->timer);
|
|
if (ret)
|
|
clear_bit(0, &work->pending);
|
|
return ret;
|
|
}
|
|
|
|
#endif
|