Linux下暂停的功能实现

#include <termio.h>
#include <stdio.h>
#include <pthread.h>
#include <unistd.h>

int scanKeyboard()
{
    int in;
    struct termios new_settings;
    struct termios stored_settings;
    tcgetattr(0,&stored_settings);
    new_settings = stored_settings;
    new_settings.c_lflag &= (~ICANON);
    new_settings.c_cc[VTIME] = 0;
    tcgetattr(0,&stored_settings);
    new_settings.c_cc[VMIN] = 1;
    tcsetattr(0,TCSANOW,&new_settings);
     
    in = getchar();
     
    tcsetattr(0,TCSANOW,&stored_settings);
    return in;
}

int stop = 0;
int stop_assist = 0;

void * pthread(void *arg){
    while(1){
        if(scanKeyboard() == 32){
            stop_assist++;
            if(stop_assist%2 == 1){
                stop = 1;
            }else{
                stop = 0;
            }
        }
    }
}
int main(){
    pthread_t thread_id;
    
    if ((pthread_create(&thread_id, NULL, pthread, NULL)) == -1){
        printf("create error!\n");
        return 1;
    }
    
    while(stop){
        sleep(1);
    }
    return 0;
}