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Socket Extension Methods for F# async.
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module Sayuri.Net.SocketExtensions | |
open System | |
open System.Net | |
open System.Net.Sockets | |
#if NET4 | |
type private ConcurrentBag<'T> = System.Collections.Concurrent.ConcurrentBag<'T> | |
#else | |
type private ConcurrentBag<'T>() = | |
let bag = System.Collections.Generic.Stack<'T>() | |
member this.TryTake() = | |
lock bag (fun () -> if 0 < bag.Count then true, bag.Pop() else false, Unchecked.defaultof<_>) | |
member this.Add(item) = | |
lock bag (fun () -> bag.Push item) | |
#endif | |
let inline private checkNonNull name arg = | |
match box arg with null -> nullArg name | _ -> () | |
let private pool = ConcurrentBag() | |
let private invoke methodAsync prepare result = async { | |
let e = match pool.TryTake() with | |
| true, e -> e | |
| false, _ -> new SocketAsyncEventArgs() | |
try | |
prepare e | |
return! Async.FromContinuations(fun (cont, econt, _) -> | |
let called = ref 0 | |
let completed (e : SocketAsyncEventArgs) = | |
assert(System.Threading.Interlocked.Increment called = 1) | |
(e.UserToken :?> IDisposable).Dispose() | |
#if NET4 | |
if e.ConnectByNameError <> null then econt e.ConnectByNameError else | |
#endif | |
if e.SocketError <> SocketError.Success then new SocketException(int e.SocketError) |> econt else | |
result e |> cont | |
e.UserToken <- e.Completed.Subscribe completed | |
if methodAsync e |> not then completed e | |
) | |
finally | |
e.AcceptSocket <- null | |
e.BufferList <- null | |
e.RemoteEndPoint <- null | |
e.SocketFlags <- SocketFlags.None | |
e.UserToken <- null | |
e.SetBuffer(null, 0, 0) | |
pool.Add(e) | |
} | |
let private setBuffer buffer offset count (e : SocketAsyncEventArgs) = | |
let offset = defaultArg offset 0 | |
let count = defaultArg count (Array.length buffer - offset) | |
e.SetBuffer(buffer, offset, count) | |
type Socket with | |
member this.AsyncAccept() = | |
invoke this.AcceptAsync | |
ignore | |
(fun e -> e.AcceptSocket) | |
member this.AsyncAccept(buffer, ?offset, ?count) = | |
invoke this.AcceptAsync | |
(fun e -> setBuffer buffer offset count e | |
assert ((this.LocalEndPoint.Serialize().Size + 16) * 2 < e.Count)) // test buffer size. | |
(fun e -> e.AcceptSocket, e.BytesTransferred) | |
member this.AsyncAccept(acceptSocket) = | |
checkNonNull "acceptSocket" acceptSocket | |
invoke this.AcceptAsync | |
(fun e -> e.AcceptSocket <- acceptSocket) | |
ignore | |
member this.AsyncAccept(acceptSocket, buffer, ?offset, ?count) = | |
checkNonNull "acceptSocket" acceptSocket | |
checkNonNull "buffer" buffer | |
invoke this.AcceptAsync | |
(fun e -> setBuffer buffer offset count e | |
assert ((this.LocalEndPoint.Serialize().Size + 16) * 2 < e.Count) // test buffer size. | |
e.AcceptSocket <- acceptSocket) | |
(fun e -> e.BytesTransferred) | |
member this.AsyncConnect(remoteEndPoint) = | |
checkNonNull "remoteEndPoint" remoteEndPoint | |
invoke this.ConnectAsync | |
(fun e -> e.RemoteEndPoint <- remoteEndPoint) | |
ignore | |
member this.AsyncConnect(remoteEndPoint, buffer, ?offset, ?count) = | |
checkNonNull "remoteEndPoint" remoteEndPoint | |
checkNonNull "buffer" buffer | |
invoke this.ConnectAsync | |
(fun e -> setBuffer buffer offset count e | |
e.RemoteEndPoint <- remoteEndPoint) | |
(fun e -> e.BytesTransferred) | |
member this.AsyncConnect(host, port) = | |
checkNonNull "host" host | |
if port < IPEndPoint.MinPort || IPEndPoint.MaxPort < port then ArgumentOutOfRangeException "port" |> raise | |
#if NET4 | |
invoke this.ConnectAsync | |
(fun e -> e.RemoteEndPoint <- DnsEndPoint(host, port)) | |
ignore | |
#else | |
Async.FromBeginEnd<string, _, _>(host, port, this.BeginConnect, this.EndConnect) | |
#endif | |
member this.AsyncDisconnect(reuseSocket) = | |
invoke this.DisconnectAsync | |
(fun e -> e.DisconnectReuseSocket <- reuseSocket) | |
ignore | |
member this.AsyncReceive(buffer, ?offset, ?count, ?socketFlags) = | |
checkNonNull "buffer" buffer | |
invoke this.ReceiveAsync | |
(fun e -> setBuffer buffer offset count e | |
e.SocketFlags <- defaultArg socketFlags SocketFlags.None) | |
(fun e -> e.BytesTransferred) | |
member this.AsyncReceive(bufferList, ?socketFlags) = | |
checkNonNull "bufferList" bufferList | |
invoke this.ReceiveAsync | |
(fun e -> e.BufferList <- bufferList | |
e.SocketFlags <- defaultArg socketFlags SocketFlags.None) | |
(fun e -> e.BytesTransferred) | |
member this.AsyncSend(buffer, ?offset, ?count, ?socketFlags) = | |
checkNonNull "buffer" buffer | |
invoke this.SendAsync | |
(fun e -> setBuffer buffer offset count e | |
e.SocketFlags <- defaultArg socketFlags SocketFlags.None) | |
(fun e -> e.BytesTransferred) | |
member this.AsyncSend(bufferList, ?socketFlags) = | |
checkNonNull "bufferList" bufferList | |
invoke this.SendAsync | |
(fun e -> e.BufferList <- bufferList | |
e.SocketFlags <- defaultArg socketFlags SocketFlags.None) | |
(fun e -> e.BytesTransferred) |
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