Blocking vs Non-Blocking TCP Reads in Go
When working with TCP connections in Go, the read operation is typically non-blocking. This means that the Read function returns immediately, even if data is not yet available. However, in some cases, it may be desirable to have a blocking read operation that waits until data is received.
Is it Possible to Enable Blocking Reads in Go?
While the built-in Read function is non-blocking, Go does not provide a direct way to make reads blocking. However, there are several methods that can simulate blocking behavior:
Example Code for Simulated Blocking Read
Here is an example of simulating a blocking read using a loop:
<code class="go">func init_tcp() *net.TCPListener { laddr, err := net.ResolveTCPAddr("tcp", ":4243") if err != nil { log.Fatal(err) } tcp, err := net.ListenTCP("tcp", laddr) if err != nil { log.Fatal(err) } return tcp } func main() { tcp := init_tcp() conn, _ := tcp.Accept() data := make([]byte, 512) conn.SetNoDelay(false) for { // Repeat Read() until data is available for len(data) == 0 { conn.Read(data) } fmt.Println(data) // Reset data for next iteration data = make([]byte, 512) } }</code>
Conclusion
While Go's TCP reads are non-blocking by default, it is possible to simulate blocking behavior using various techniques. The best approach depends on the specific requirements of the application. Keep in mind that simulated blocking may introduce additional overhead or complexity, so it should be used judiciously.
The above is the detailed content of How can I achieve blocking TCP reads in Go?. For more information, please follow other related articles on the PHP Chinese website!