Are golang net.UDPConn and net.TCPConn thread safe?? Can i read or write of single UDPConn object in multi thread?
go, sockets, thread-safety
Solution
The documentation for `net.Conn` says:
Multiple goroutines may invoke methods on a Conn simultaneously.
Problem
1.Can we call send from one thread and recv from another on the same net.UDPConn or net.TCPConn objects? 2.Can we call multiple sends parallely from different threads on the same net.UDPConn or net.TCPConn objects? I am unable to find a good documentation also for the same. Is golang socket api thread safe? I find that it is hard to test if it is thread safe. Any pointers in the direction will be helpful. My test code is below: ``` package main import ( "fmt" "net" "sync" ) func udp_server() { // create listen conn, err := net.ListenUDP("udp", &net.UDPAddr{ IP: net.IPv4(0, 0, 0, 0), Port: 8080, }) if err != nil { fmt.Println("listen fail", err) return } defer conn.Close() var wg sync.WaitGroup for i := 0; i < 10; i = i + 1 { wg.Add(1) go func(socket *net.UDPConn) { defer wg.Done() for { // read data data := make([]byte, 4096) read, remoteAddr, err := socket.ReadFromUDP(data) if err != nil { fmt.Println("read data fail!", err) continue } fmt.Println(read, remoteAddr) fmt.Printf("%s\n\n", data) // send data senddata := []byte("hello client!") _, err = socket.WriteToUDP(senddata, remoteAddr) if err != nil { return fmt.Println("send data fail!", err) } } }(conn) } wg.Wait() } func main() { udp_server() } ``` Is it OK for this test code?