#include "log.h"
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <unistd.h>

int in_log(logs *log,log_manager *self)
{
    sem_wait(&self->log_sem);//加锁
    logs *buf = self->rear;
    if(self->log == NULL){
        self->log = log;
        self->rear = log;
        return 0;
    }
    self->count++;
    buf->next = log;
    log->next = NULL;
    self->rear = log;
    sem_post(&self->log_sem);
    return self->count;
}

logs *out_log(log_manager *self)
{
    sem_wait(&self->log_sem);
    logs *buf = self->log;
    if(self->log->next ==NULL)
        self->log = self->rear = NULL;
    self->count--;
    sem_post(&self->log_sem);
    buf->next =NULL;
    return buf;
}

//定期清理函数
void *clear_log(void *self_p)
{
    log_manager *self = (log_manager*)self_p;
    for(;;)
    {
        sleep(1000);
        sem_wait(&self->log_sem);
        if(self->count<256){
            sem_post(&self->log_sem);
            continue;
        }
        logs* buf = self->log;
        self->log = self->rear =NULL;
        sem_post(&self->log_sem);
        logs* tobeclear;
        while(buf->next !=NULL)
        {
            tobeclear = buf;
            buf = buf->next;
            free(tobeclear);
        }
    }
}

int init_loger(log_manager *self)
{
    if(self == NULL)
    {
        perror("NULL\n");
        return -1;
    }
    sem_init(&self->log_sem, 0,1);
    self->in_log = in_log;
    self->out_log = out_log;
    self->clear_log = clear_log;
    self->log = NULL;
}