Thread: Read RS232 with interrupt

I use this library and I want to read from rs232 with interrupt but it doesn't work
How can I fix it?

Code:

#include<assert.h>
#include<fcntl.h>
#include<signal.h>
#include<stdio.h>
#include<string.h>
#include<termios.h> 

#ifdef__linux__ 
#include<unistd.h> 
#endif 

#ifdef_WIN32 
#include<windows.h>
 #endif 

#ifdef NDEBUG
 #error This test program must work with macro "ASSERT" enabled! 
#endif 

#include"rs232.h" 

void sleep_awhile(void){ 

#ifdefined(__linux__) 
usleep(1*1000*1000); 
#elif defined(_WIN32)
 Sleep(1*1000); 
#else 
#error No implementation on this platform!
 #endif 
} 

void serial_callback(int status); 

rs232_t comm; 
struct termios termAttr; 
struct sigaction saio; 

int main(void){ 

#ifdefined(__linux__) 
staticconstchar*const device="/dev/ttyS0"; 
#elif defined(_WIN32) 
staticconstchar*constdevice="COM1"; 
#endif 

printf("== Before test process : ==\n");
printf("1. Please check this device "%s" is available.\n",device); printf("2. Be sure that you had connect the RS-232 port to a loop back " "connector.\n");
 printf("\n"); 

rs232_init(&comm); 

bool open_result=rs232_open(&comm,device); 
printf("Open device "%s" : %s\n",device, (open_result)?("Succeed"):("Failed")); 
if (!open_result)
 return 1; 

saio.sa_handler=serial_callback;
saio.sa_flags=0; 
saio.sa_restorer=NULL;
sigaction(SIGIO,&saio,NULL); 

fcntl(open_result,F_SETFL,FNDELAY); 
fcntl(open_result,F_SETOWN,getpid()); 
fcntl(open_result,F_SETFL,O_ASYNC); 


//-Flush
 sleep_awhile(); 
assert(rs232_flush(&comm)); 
printf("Flushed.\n"); 

//-Sendmessage 
static const char message[]="RS-232 test message"; 
assert(sizeof(message)==rs232_send(&comm,message,sizeof(message))); 
printf("Sent.\n"); 

sleep_awhile(); 

rs232_deinit(&comm); 
return0;
 } 

void serial_callback(int__attribute__((unused))status){
char buffer[1024]={0};
 int  recsz=rs232_receive(&comm,buffer,sizeof(buffer));
 printf("Received size : %d\n",recsz);
printf("Response message : [%s]\n",buffer);
}