kolibrios/drivers/include/linux/wait.h
Sergey Semyonov (Serge) 66fbaa74b0 ddk: v4.6.7
git-svn-id: svn://kolibrios.org@7143 a494cfbc-eb01-0410-851d-a64ba20cac60
2018-02-02 14:53:42 +00:00

332 lines
12 KiB
C

#ifndef _LINUX_WAIT_H
#define _LINUX_WAIT_H
/*
* Linux wait queue related types and methods
*/
#include <linux/list.h>
#include <linux/stddef.h>
#include <linux/spinlock.h>
#include <asm/current.h>
#include <syscall.h>
typedef struct __wait_queue wait_queue_t;
typedef int (*wait_queue_func_t)(wait_queue_t *wait, unsigned mode, int flags, void *key);
int default_wake_function(wait_queue_t *wait, unsigned mode, int flags, void *key);
/* __wait_queue::flags */
#define WQ_FLAG_EXCLUSIVE 0x01
#define WQ_FLAG_WOKEN 0x02
struct __wait_queue {
unsigned int flags;
void *private;
wait_queue_func_t func;
struct list_head task_list;
evhandle_t evnt;
};
struct wait_bit_key {
void *flags;
int bit_nr;
#define WAIT_ATOMIC_T_BIT_NR -1
unsigned long timeout;
};
struct wait_bit_queue {
struct wait_bit_key key;
wait_queue_t wait;
};
struct __wait_queue_head {
spinlock_t lock;
struct list_head task_list;
};
typedef struct __wait_queue_head wait_queue_head_t;
struct task_struct;
/*
* Macros for declaration and initialisaton of the datatypes
*/
#define __WAITQUEUE_INITIALIZER(name, tsk) { \
.private = tsk, \
.func = default_wake_function, \
.task_list = { NULL, NULL } }
#define DECLARE_WAITQUEUE(name, tsk) \
wait_queue_t name = __WAITQUEUE_INITIALIZER(name, tsk)
#define __WAIT_QUEUE_HEAD_INITIALIZER(name) { \
.lock = __SPIN_LOCK_UNLOCKED(name.lock), \
.task_list = { &(name).task_list, &(name).task_list } }
#define DECLARE_WAIT_QUEUE_HEAD(name) \
wait_queue_head_t name = __WAIT_QUEUE_HEAD_INITIALIZER(name)
#define __WAIT_BIT_KEY_INITIALIZER(word, bit) \
{ .flags = word, .bit_nr = bit, }
#define __WAIT_ATOMIC_T_KEY_INITIALIZER(p) \
{ .flags = p, .bit_nr = WAIT_ATOMIC_T_BIT_NR, }
extern void __init_waitqueue_head(wait_queue_head_t *q, const char *name, struct lock_class_key *);
#ifdef CONFIG_LOCKDEP
# define __WAIT_QUEUE_HEAD_INIT_ONSTACK(name) \
({ init_waitqueue_head(&name); name; })
# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) \
wait_queue_head_t name = __WAIT_QUEUE_HEAD_INIT_ONSTACK(name)
#else
# define DECLARE_WAIT_QUEUE_HEAD_ONSTACK(name) DECLARE_WAIT_QUEUE_HEAD(name)
#endif
static inline void init_waitqueue_entry(wait_queue_t *q, struct task_struct *p)
{
q->flags = 0;
q->private = p;
q->func = default_wake_function;
}
static inline void
init_waitqueue_func_entry(wait_queue_t *q, wait_queue_func_t func)
{
q->flags = 0;
q->private = NULL;
q->func = func;
}
static inline int waitqueue_active(wait_queue_head_t *q)
{
return !list_empty(&q->task_list);
}
extern void add_wait_queue(wait_queue_head_t *q, wait_queue_t *wait);
extern void add_wait_queue_exclusive(wait_queue_head_t *q, wait_queue_t *wait);
extern void remove_wait_queue(wait_queue_head_t *q, wait_queue_t *wait);
static inline void __add_wait_queue(wait_queue_head_t *head, wait_queue_t *new)
{
list_add(&new->task_list, &head->task_list);
}
/*
* Used for wake-one threads:
*/
static inline void
__add_wait_queue_exclusive(wait_queue_head_t *q, wait_queue_t *wait)
{
wait->flags |= WQ_FLAG_EXCLUSIVE;
__add_wait_queue(q, wait);
}
static inline void __add_wait_queue_tail(wait_queue_head_t *head,
wait_queue_t *new)
{
list_add_tail(&new->task_list, &head->task_list);
}
static inline void
__add_wait_queue_tail_exclusive(wait_queue_head_t *q, wait_queue_t *wait)
{
wait->flags |= WQ_FLAG_EXCLUSIVE;
__add_wait_queue_tail(q, wait);
}
static inline void
__remove_wait_queue(wait_queue_head_t *head, wait_queue_t *old)
{
list_del(&old->task_list);
}
typedef int wait_bit_action_f(struct wait_bit_key *, int mode);
void __wake_up(wait_queue_head_t *q, unsigned int mode, int nr, void *key);
void __wake_up_locked_key(wait_queue_head_t *q, unsigned int mode, void *key);
void __wake_up_sync_key(wait_queue_head_t *q, unsigned int mode, int nr, void *key);
void __wake_up_locked(wait_queue_head_t *q, unsigned int mode, int nr);
void __wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr);
void __wake_up_bit(wait_queue_head_t *, void *, int);
int __wait_on_bit(wait_queue_head_t *, struct wait_bit_queue *, wait_bit_action_f *, unsigned);
int __wait_on_bit_lock(wait_queue_head_t *, struct wait_bit_queue *, wait_bit_action_f *, unsigned);
void wake_up_bit(void *, int);
void wake_up_atomic_t(atomic_t *);
int out_of_line_wait_on_bit(void *, int, wait_bit_action_f *, unsigned);
int out_of_line_wait_on_bit_timeout(void *, int, wait_bit_action_f *, unsigned, unsigned long);
int out_of_line_wait_on_bit_lock(void *, int, wait_bit_action_f *, unsigned);
int out_of_line_wait_on_atomic_t(atomic_t *, int (*)(atomic_t *), unsigned);
wait_queue_head_t *bit_waitqueue(void *, int);
/*
#define __wait_event(wq, condition) \
do { \
DEFINE_WAIT(__wait); \
\
for (;;) { \
prepare_to_wait(&wq, &__wait, TASK_UNINTERRUPTIBLE); \
if (condition) \
break; \
schedule(); \
} \
finish_wait(&wq, &__wait); \
} while (0)
*/
#define wait_event_timeout(wq, condition, timeout) \
({ \
long __ret = timeout; \
do{ \
wait_queue_t __wait = { \
.task_list = LIST_HEAD_INIT(__wait.task_list), \
.evnt = CreateEvent(NULL, MANUAL_DESTROY), \
}; \
unsigned long flags; \
\
spin_lock_irqsave(&wq.lock, flags); \
if (list_empty(&__wait.task_list)) \
__add_wait_queue(&wq, &__wait); \
spin_unlock_irqrestore(&wq.lock, flags); \
\
for(;;){ \
if (condition) \
break; \
WaitEventTimeout(__wait.evnt, timeout); \
}; \
if (!list_empty(&__wait.task_list)) { \
spin_lock_irqsave(&wq.lock, flags); \
list_del_init(&__wait.task_list); \
spin_unlock_irqrestore(&wq.lock, flags); \
}; \
DestroyEvent(__wait.evnt); \
} while (0); \
__ret; \
})
#define wait_event_interruptible_timeout(wq, condition, timeout) \
wait_event_timeout(wq, condition, timeout)
#define wait_event(wq, condition) \
do{ \
wait_queue_t __wait = { \
.task_list = LIST_HEAD_INIT(__wait.task_list), \
.evnt = CreateEvent(NULL, MANUAL_DESTROY), \
}; \
unsigned long flags; \
\
spin_lock_irqsave(&wq.lock, flags); \
if (list_empty(&__wait.task_list)) \
__add_wait_queue(&wq, &__wait); \
spin_unlock_irqrestore(&wq.lock, flags); \
\
for(;;){ \
if (condition) \
break; \
WaitEvent(__wait.evnt); \
}; \
if (!list_empty_careful(&__wait.task_list)) { \
spin_lock_irqsave(&wq.lock, flags); \
list_del_init(&__wait.task_list); \
spin_unlock_irqrestore(&wq.lock, flags); \
}; \
DestroyEvent(__wait.evnt); \
} while (0)
#define wait_event_interruptible(wq, condition) \
({ \
int __ret = 0; \
if (!(condition)) \
wait_event(wq, condition); \
__ret; \
})
static inline
void wake_up(wait_queue_head_t *q)
{
wait_queue_t *curr;
unsigned long flags;
spin_lock_irqsave(&q->lock, flags);
curr = list_first_entry_or_null(&q->task_list, typeof(*curr), task_list);
if(curr != NULL)
{
if(!WARN_ON(curr->evnt.handle == 0))
{
kevent_t event = {0};
event.code = -1;
RaiseEvent(curr->evnt, 0, &event);
}
}
spin_unlock_irqrestore(&q->lock, flags);
}
static inline
void wake_up_interruptible(wait_queue_head_t *q)
{
wait_queue_t *curr;
unsigned long flags;
spin_lock_irqsave(&q->lock, flags);
curr = list_first_entry_or_null(&q->task_list, typeof(*curr), task_list);
if(curr != NULL)
{
if(!WARN_ON(curr->evnt.handle == 0))
{
kevent_t event = {0};
event.code = -1;
RaiseEvent(curr->evnt, 0, &event);
}
}
spin_unlock_irqrestore(&q->lock, flags);
}
static inline
void wake_up_all(wait_queue_head_t *q)
{
wait_queue_t *curr;
unsigned long flags;
spin_lock_irqsave(&q->lock, flags);
list_for_each_entry(curr, &q->task_list, task_list)
{
if(WARN_ON(curr->evnt.handle == 0))
continue;
kevent_t event = {0};
event.code = -1;
RaiseEvent(curr->evnt, 0, &event);
}
spin_unlock_irqrestore(&q->lock, flags);
}
static inline void
init_waitqueue_head(wait_queue_head_t *q)
{
spin_lock_init(&q->lock);
INIT_LIST_HEAD(&q->task_list);
};
//struct completion {
// unsigned int done;
// wait_queue_head_t wait;
//};
void prepare_to_wait(wait_queue_head_t *q, wait_queue_t *wait, int state);
void finish_wait(wait_queue_head_t *q, wait_queue_t *wait);
int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key);
#define DEFINE_WAIT_FUNC(name, function) \
wait_queue_t name = { \
.func = function, \
.task_list = LIST_HEAD_INIT((name).task_list), \
.evnt = CreateEvent(NULL, MANUAL_DESTROY), \
}
#define DEFINE_WAIT(name) DEFINE_WAIT_FUNC(name, autoremove_wake_function)
#endif