mainform.ui.h

在Linux底下用QtDesigner开发的一个进程同步例子。基本思想是设计一个缓冲区（循环队列）

/****************************************************************************
** ui.h extension file, included from the uic-generated form implementation.
**
** If you wish to add, delete or rename functions or slots use
** Qt Designer which will update this file, preserving your code. Create an
** init() function in place of a constructor, and a destroy() function in
** place of a destructor.
*****************************************************************************/
#include"queue.h"
#include <qmessagebox.h>
#include<qstring.h>
HQueue hq;
static int in=0;
static int out=0;

void mainForm::addSlot()
{
    //HQueue hq;
    /*
    Circle item;*/
    if(!hq.IsFull()&&0==out)
    {
	Circle item;
    item.InitX=lineEdit1->text().toInt();
    item.InitY=lineEdit2->text().toInt();
    item.InitR=lineEdit3->text().toInt();
    hq.EnQueue(item);
    in++;
    }
    else if(in==3)
    {
    in=0;
    QMessageBox::warning(this,"warning","you cannot add item,buffer is full!");
    }
    else
	QMessageBox::warning(this,"warning","Buffer is not empty,you cannot add item!");
}


void mainForm::GetSlot()
{
   if(!hq.IsEmpty()&&0==in) 
    {
  Circle item; 	 
  item=hq.DeQueue();  
    //item=hq.GetFront();
  QString strX;
  QString strY;
  QString strR;
  strX=strX.setNum(item.InitX);
  strY=strY.setNum(item.InitY);
  strR=strR.setNum(item.InitR);
  
  lineEdit4->setText("x="+strX);//+item.InitX);
  lineEdit5->setText("y="+strY);
  lineEdit6->setText("r="+strR);
  out++;
 }
   else if(out==3)
   {
  out=0;
 
      QMessageBox::warning(this,"warning","you cannot get item! Buffer is empty");

  }
   else
       QMessageBox::warning(this,"warning","Buffer is not full,you cannot get item!");

  //lineEdit1->setText()
  
}