Function std.socket.Socket.select
Wait for a socket to change status. A wait timeout of Duration or
TimeVal, may be specified; if a timeout is not specified or the
TimeVal is null, the maximum timeout is used. The TimeVal
timeout has an unspecified value when select returns.
static int select(
SocketSet checkRead,
SocketSet checkWrite,
SocketSet checkError,
Duration timeout
) @trusted;
static int select(
SocketSet checkRead,
SocketSet checkWrite,
SocketSet checkError
) @safe;
static int select(
SocketSet checkRead,
SocketSet checkWrite,
SocketSet checkError,
TimeVal* timeout
) @trusted;
Returns
The number of sockets with status changes, 0 on timeout,
or -1 on interruption. If the return value is greater than 0,
the SocketSets are updated to only contain the sockets having status
changes. For a connecting socket, a write status change means the
connection is established and it's able to send. For a listening socket,
a read status change means there is an incoming connection request and
it's able to accept.
SocketSet's updated to include only those sockets which an event occured.
For a connect()ing socket, writeability means connected.
For a listen()ing socket, readability means listening
Winsock; possibly internally limited to 64 sockets per set.
Returns
the number of events, 0 on timeout, or -1 on interruption
Authors
Christopher E. Miller, David Nadlinger, Vladimir Panteleev