CreateThread的问题

Question

创建两个线程,分别输出信息。
但是信息刚输出一半或部分，线程就发生切换
转而输出另部分内容，造成信息混乱。请问如何解决？如：示例效果是这样的Thread1 sell ticket: 100
Thread2 sell ticket: 100
Thread2 sell ticket: 100
Thread1 sell ticket: 100
.......
.......
实际效果
Thread1 sell ticThread2 sell ticket:99
Thread2 sket:100
Thread1 sell ticket:97
Threell ticket:98
Thread2 sell ticket:9ad1 sell ticket:96#include<windows.h>
#include<iostream>DWORD WINAPI Fun1Proc(LPVOID  lp);
DWORD WINAPI Fun2Proc(LPVOID  lp);
using namespace std;int tickets = 100;int main()
{
HANDLE hThread1;
HANDLE hThread2;
hThread1 = CreateThread(NULL,0,Fun1Proc,NULL,0,NULL);
hThread2 = CreateThread(NULL,0,Fun2Proc,NULL,0,NULL);
CloseHandle(hThread1);
CloseHandle(hThread2);
Sleep(4000);
return 0;
}
DWORD WINAPI Fun1Proc(LPVOID  lp)
{
while(true)
{
if(tickets>0)
{
cout<<"Thread1 sell ticket:"<<tickets--<<endl;
}
else
break;
} return 0;
}DWORD WINAPI Fun2Proc(LPVOID  lp)
{ while(true)
{
if(tickets>0)
{
cout<<"Thread2 sell ticket:"<<tickets--<<endl;
}
else
break;
}
return 0;
}

Answer 1

先改用_beginthreadex创建线程 试试。

Answer 2

本身进程就是抢占资源输出的，楼主要控制的话，可以用信号互斥Mutex或者Event

Answer 3

线程加锁#include <windows.h>
#include <iostream.h>DWORD WINAPI Fun1Proc(
  LPVOID lpParameter   // thread data
);DWORD WINAPI Fun2Proc(
  LPVOID lpParameter   // thread data
);
int index=0;
int tickets=100;
HANDLE hMutex;
void main()
{
HANDLE hThread1;
HANDLE hThread2;
hThread1=CreateThread(NULL,0,Fun1Proc,NULL,0,NULL);
hThread2=CreateThread(NULL,0,Fun2Proc,NULL,0,NULL);
CloseHandle(hThread1);
CloseHandle(hThread2);

hMutex=CreateMutex(NULL,TRUE,"tickets");
if(hMutex)
{
if(ERROR_ALREADY_EXISTS==GetLastError())
{
cout<<"only instance can run!"<<endl;
return;
}
}
WaitForSingleObject(hMutex,INFINITE);
ReleaseMutex(hMutex);
ReleaseMutex(hMutex);
Sleep(4000);}DWORD WINAPI Fun1Proc(
  LPVOID lpParameter   // thread data
)
{
while(TRUE)
{
WaitForSingleObject(hMutex,INFINITE);
if(tickets>0)
{
Sleep(1);
cout<<"thread1 sell ticket : "<<tickets--<<endl;
}
else
break;
ReleaseMutex(hMutex);
} WaitForSingleObject(hMutex,INFINITE);
cout<<"thread1 is running"<<endl;
return 0;
}DWORD WINAPI Fun2Proc(
  LPVOID lpParameter   // thread data
)
{

while(TRUE)
{
//ReleaseMutex(hMutex);
WaitForSingleObject(hMutex,INFINITE);
if(tickets>0)
{
Sleep(1);
cout<<"thread2 sell ticket : "<<tickets--<<endl;
}
else
break;
ReleaseMutex(hMutex);
}
WaitForSingleObject(hMutex,INFINITE);
cout<<"thread2 is running"<<endl;
return 0;
}