线程响应键盘按键的例子

例子1：键盘输入的字符会排队，一个一个被线程处理。

#include <iostream>
#include <stdio.h>
#include <pthread.h>
using namespace std;

char ch = 0;
pthread_t tid;

void *thread_func(void *arg)
{
while(true)
{
ch=getchar();
sleep(1);
}
}

int main()
{
//pthread_t tid;
if (pthread_create(&tid, NULL, thread_func, NULL) != 0)
{
cout<<"Create thread error\n";
return -1;
}

while(1)
{
if(ch=='p' || ch=='P')
{
cout<<"Keboard: '"<<ch<<"': print"<<endl;
ch=0;
continue;
}else if(ch=='q' || ch=='Q')
{
cout<<"Keboard: '"<<ch<<"': exit"<<endl;
break;
}

}
return 0;

}

输出结果：

[root@localhost thread]# ./a.out
p
Keboard: 'p': print
p
p
op
Keboard: 'p': print
Keboard: 'p': print
Keboard: 'p': print
pppppq
Keboard: 'p': print
Keboard: 'p': print
Keboard: 'p': print
Keboard: 'p': print
Keboard: 'p': print
Keboard: 'q': exit

[root@localhost thread]# ./a.out
p
Keboard: 'p': print
^C

例子2：信号和线程一起的例子

#include <iostream>
#include <stdio.h>
#include <pthread.h>
#include <signal.h>
using namespace std;

char ch = 0;

//signal
void handle_sigint(int)
{
printf("[singal]: catched ctrl+c\n");
ch='q';
}

//pthread
pthread_t tid;
void *thread_func(void *arg)
{
while(true)
{
ch=getchar();
sleep(1);
}
}

int main()
{
//signal
struct sigaction sig;
sig.sa_handler = handle_sigint;
sigemptyset(&sig.sa_mask);
sig.sa_flags = 0;
sigaction(SIGINT, &sig, NULL);

//pthread_t
if (pthread_create(&tid, NULL, thread_func, NULL) != 0)
{
cout<<"Create thread error\n";
return -1;
}

while(1)
{
if(ch=='p' || ch=='P')
{
cout<<"Keboard: '"<<ch<<"': print"<<endl;
ch=0;
continue;
}else if(ch=='q' || ch=='Q')
{
cout<<"Keboard: '"<<ch<<"': exit"<<endl;
break;
}

}

return 0;

}

输出结果：

[root@localhost thread]# ./a.out
p
Keboard: 'p': print
p
p
Keboard: 'p': print
Keboard: 'p': print
q
Keboard: 'q': exit