int CreateSocket()
{
socklen_t len = sizeof(client);
// Socket creation for UDP
acceptSocket=socket(AF_INET,SOCK_DGRAM,0);
if(acceptSocket==-1)
{
printf("Failure: socket creation is failed, failure code\n");
return 1;
}
else
{
printf("Socket started!\n");
}
//non blocking mode
/* rc = ioctl(acceptSocket, FIONBIO, (char *)&flag);
if (rc < 0)
{
printf("\n ioctl() failed \n");
return 0;
}*/
//Bind the socket
memset(&addr, 0, sizeof(addr));
addr.sin_family=AF_INET;
addr.sin_port=htons(port);
addr.sin_addr.s_addr=htonl(INADDR_ANY);
rc=bind(acceptSocket,(struct sockaddr*)&addr,sizeof(addr));
if(rc== -1)
{
printf("Failure: listen, failure code:\n")
return 1;
}
else
{
printf("Socket an port %d \n",port);
}
if(acceptSocket == -1)
{
printf("Fehler: accept, fehler code:\n");
return 1;
}
else
{
while(rc!=-1)
{
rc=recvfrom(acceptSocket,buf, 256, 0, (struct sockaddr*) &client, &len);
if(rc==0)
{
printf("Server has no connection..\n");
break;
}
if(rc==-1)
{
printf("something went wrong with data %s", strerror(errno));
break;
}
// XcpIp_RxCallback( (uint16) rc, (uint8*) buf, (uint16) port );
}
}
close(acceptSocket);
return 0;
}
void checkTasks()
{
int i;
for( i =1; i<= 100 ;i++)
{
if(++task1_counter ==2 )
{
task1_counter = 0;
makeTimer("First Timer", &firstTimerID, 2, 2); // creating the timer for 2ms
}
else if(++task2_counter == 10)
{
task2_counter = 0;
makeTimer("Second Timer", &secondTimerID, 10, 10); //creating the timer for 10ms
}
else if(++task3_counter == 100)
{
task3_counter = 0;
makeTimer("Third Timer", &thirdTimerID, 100, 100); //creating the timer for 100ms
}
else
printf("error\n");
}
}
}
int main()
{
CreateSocket(); //initializing all the foreground tasks
while(1)
{
checkTasks();
}
}
CreateSocket：此API正在不断地从客户端接收数据。我在CreateSocket函数中的while循环中调用了recvfrom api（在上面的代码中没有显示）。我在main函数的while循环中调用checkTasks。它正在检查计数器并调用makeTimer（）函数调用：此函数定义用于创建计时器并通过信号每2ms，10ms和100ms调用任务。
我的问题：一旦在main（）中调用一个init函数：它是否会从客户端接收数据，并且在后台checkTasks将继续运行？是不是？