wait.h

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#ifndef __KERNEL_WAIT_H__
#define __KERNEL_WAIT_H__
 
#include <stdbool.h>
 
#include <common/list.h>
#include <kernel/kernel.h>
#include <kernel/sched.h>
#include <kernel/thread.h>
 
typedef struct list_head wait_queue_head_t;
 
#define DECLARE_WAIT_QUEUE_HEAD(name) LIST_HEAD(name)
 
#define init_waitqueue_head(wq) INIT_LIST_HEAD(wq)
 
#define wait_event(wq_head, condition)                           \
    do {                                                         \
        CURRENT_THREAD_INFO(curr_thread);                        \
        while (1) {                                              \
            if (condition)                                       \
                break;                                           \
            prepare_to_wait(&wq_head, curr_thread, THREAD_WAIT); \
            schedule();                                          \
        }                                                        \
    } while (0)
 
void prepare_to_wait(struct list_head *wait_list,
                     struct thread_info *thread,
                     int state);
 
void wake_up(struct list_head *wait_list);
 
void wake_up_all(struct list_head *wait_list);
 
void finish_wait(struct thread_info *thread);
 
#endif