select 应用，加入队列

来源：互联网发布：北京租房软件编辑：程序博客网时间：2024/06/05 06:39

#include "listenhtmldata_thread.h"

#include <QDebug>

#include <stdio.h>
#include <malloc.h>
#include "string.h"
#include "queue.h"
Queue *queue_headpointer;//定义顺序栈的指针

#define HtmlSetParaDataFIFO "/web/HtmlSetParaDataFIFO" //html data ,write to FIFO
int htmldatafifo_fd=0;
#define QUEUESTRSIZE 512//

listenHtmldata_thread::listenHtmldata_thread()
{
    //#define HtmlSetParaDataFIFO"/web/HtmlSetParaDataFIFO"//html data ,write to FIFO
    unlink(HtmlSetParaDataFIFO);//delelte fifo
    mkfifo(HtmlSetParaDataFIFO,0666);//creat fifo
    htmldatafifo_fd=::open(HtmlSetParaDataFIFO,O_RDONLY|O_NONBLOCK ,0);//O_RDONLY,O_WRONLY,O_NONBLOCK
    if(htmldatafifo_fd<0)
    {
        //   perror("open fifo error");
        qDebug()<<"open fifo error";
        //exit(1);
        return ;
    }
    else
        qDebug()<<"open fifo success**********************************";

    queue_headpointer=(Queue*)malloc(sizeof(Queue));
    if(queue_headpointer==NULL)
        printf("malloc memeory is faiure!\n");
    // printf("Test the Queue is or is not good ?\n press 'q' is quit\n");
    InitQueue(queue_headpointer);
    printf("InitQueue over\n");

    if(EmptyQueue(queue_headpointer))
        printf("the Queue is empty\n");
    else
        printf("the Queue is not empty\n");

}
void listenHtmldata_thread::run()
{
    char item[QUEUESTRSIZE];//=line.toLatin1().data();
    int nread=0;
    printf("\n listenHtmldata_thread listenHtmldata_thread::run()        ------......\n");
    memset(item,0,sizeof(item));

    while(1)
    {
        fd_set rset;

FD_ZERO(&rset);
FD_SET(htmldatafifo_fd,&rset);

        struct timeval tv;
        tv.tv_sec=5;//5s
        tv.tv_usec=0;
        int ret=0;
        // memset(item,NULL,sizeof(item));in main not is null
        qDebug()<<"select go**********************************************";
        ret=select(htmldatafifo_fd+1,&rset,NULL,NULL,&tv);
        qDebug()<<"select end**********************************************";
        if(ret<0)
        {
            // perror("select error");
            qDebug()<<"select error**********************************************";
            //return ;
        }
        else if(ret==0)
        {
            qDebug()<<"select time out**********************************************";
            //return ;
        }
        else if(FD_ISSET(htmldatafifo_fd,&rset))//fd is ready
        {
            if((nread=read(htmldatafifo_fd,item,sizeof(item)))==-1)
            {
                if(errno==EAGAIN)
                {
                    printf("THE fifo has not data yet.please try again later\n");
                }
            }
            else //success read from fifo
            {
                qDebug()<<"nread is "<<nread;
                //PUSH QUEUE
                printf("read fifo data is %s\n",item);
          //read fifo data is Sv=40&P=15&Ti=3&Td=0.0&Tf=0.0&Gate=0.0&delay=0.0&group1=remote&group2=manualset&Submit=%CC%E1%BD%BB
                qDebug()<<"the item PUSH to the Queue :\n";
                EnterQueue(item,queue_headpointer);

            }
            //OutQueue
             qDebug()<<"the item POP from the Queue :\n";
            while(!EmptyQueue(queue_headpointer))
            {
                 OutQueue(item,queue_headpointer);
                 send_htmldata_signal(item);
            }
        }
        sleep(1);
    }
}