forked from KolibriOS/kolibrios
179 lines
6.9 KiB
C
179 lines
6.9 KiB
C
#ifndef _LINUX_WAIT_H
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#define _LINUX_WAIT_H
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/*
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* Linux wait queue related types and methods
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*/
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#include <linux/list.h>
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#include <linux/stddef.h>
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#include <linux/spinlock.h>
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#include <asm/current.h>
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#include <syscall.h>
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typedef struct __wait_queue wait_queue_t;
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typedef int (*wait_queue_func_t)(wait_queue_t *wait, unsigned mode, int flags, void *key);
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int default_wake_function(wait_queue_t *wait, unsigned mode, int flags, void *key);
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typedef struct __wait_queue_head wait_queue_head_t;
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struct __wait_queue
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{
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wait_queue_func_t func;
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struct list_head task_list;
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evhandle_t evnt;
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};
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struct __wait_queue_head
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{
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spinlock_t lock;
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struct list_head task_list;
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};
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static inline int waitqueue_active(wait_queue_head_t *q)
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{
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return !list_empty(&q->task_list);
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}
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extern void add_wait_queue(wait_queue_head_t *q, wait_queue_t *wait);
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extern void add_wait_queue_exclusive(wait_queue_head_t *q, wait_queue_t *wait);
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extern void remove_wait_queue(wait_queue_head_t *q, wait_queue_t *wait);
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static inline void __add_wait_queue(wait_queue_head_t *head, wait_queue_t *new)
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{
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list_add(&new->task_list, &head->task_list);
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}
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/*
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#define __wait_event(wq, condition) \
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do { \
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DEFINE_WAIT(__wait); \
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\
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for (;;) { \
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prepare_to_wait(&wq, &__wait, TASK_UNINTERRUPTIBLE); \
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if (condition) \
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break; \
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schedule(); \
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} \
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finish_wait(&wq, &__wait); \
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} while (0)
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*/
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#define wait_event_timeout(wq, condition, timeout) \
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({ \
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long __ret = timeout; \
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do{ \
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wait_queue_t __wait = { \
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.task_list = LIST_HEAD_INIT(__wait.task_list), \
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.evnt = CreateEvent(NULL, MANUAL_DESTROY), \
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}; \
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unsigned long flags; \
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\
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spin_lock_irqsave(&wq.lock, flags); \
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if (list_empty(&__wait.task_list)) \
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__add_wait_queue(&wq, &__wait); \
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spin_unlock_irqrestore(&wq.lock, flags); \
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\
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for(;;){ \
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if (condition) \
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break; \
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WaitEventTimeout(__wait.evnt, timeout); \
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}; \
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if (!list_empty(&__wait.task_list)) { \
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spin_lock_irqsave(&wq.lock, flags); \
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list_del_init(&__wait.task_list); \
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spin_unlock_irqrestore(&wq.lock, flags); \
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}; \
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DestroyEvent(__wait.evnt); \
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} while (0); \
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__ret; \
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})
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#define wait_event_interruptible_timeout(wq, condition, timeout) \
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wait_event_timeout(wq, condition, timeout)
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#define wait_event(wq, condition) \
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do{ \
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wait_queue_t __wait = { \
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.task_list = LIST_HEAD_INIT(__wait.task_list), \
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.evnt = CreateEvent(NULL, MANUAL_DESTROY), \
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}; \
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unsigned long flags; \
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\
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spin_lock_irqsave(&wq.lock, flags); \
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if (list_empty(&__wait.task_list)) \
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__add_wait_queue(&wq, &__wait); \
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spin_unlock_irqrestore(&wq.lock, flags); \
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\
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for(;;){ \
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if (condition) \
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break; \
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WaitEvent(__wait.evnt); \
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}; \
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if (!list_empty_careful(&__wait.task_list)) { \
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spin_lock_irqsave(&wq.lock, flags); \
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list_del_init(&__wait.task_list); \
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spin_unlock_irqrestore(&wq.lock, flags); \
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}; \
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DestroyEvent(__wait.evnt); \
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} while (0)
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#define wait_event_interruptible(wq, condition) \
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({ \
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int __ret = 0; \
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if (!(condition)) \
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wait_event(wq, condition); \
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__ret; \
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})
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static inline
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void wake_up_all(wait_queue_head_t *q)
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{
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wait_queue_t *curr;
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unsigned long flags;
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spin_lock_irqsave(&q->lock, flags);
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list_for_each_entry(curr, &q->task_list, task_list)
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{
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// printf("raise event \n");
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kevent_t event;
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event.code = -1;
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RaiseEvent(curr->evnt, 0, &event);
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}
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spin_unlock_irqrestore(&q->lock, flags);
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}
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static inline void
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init_waitqueue_head(wait_queue_head_t *q)
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{
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spin_lock_init(&q->lock);
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INIT_LIST_HEAD(&q->task_list);
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};
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//struct completion {
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// unsigned int done;
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// wait_queue_head_t wait;
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//};
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int autoremove_wake_function(wait_queue_t *wait, unsigned mode, int sync, void *key);
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#define DEFINE_WAIT_FUNC(name, function) \
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wait_queue_t name = { \
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.func = function, \
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.task_list = LIST_HEAD_INIT((name).task_list), \
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.evnt = CreateEvent(NULL, MANUAL_DESTROY), \
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}
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#define DEFINE_WAIT(name) DEFINE_WAIT_FUNC(name, autoremove_wake_function)
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#endif
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