/// <devdoc>
/// <para>Determines the status of a socket.</para>
/// </devdoc>
public static void Select(IList checkRead, IList checkWrite, IList checkError, int microSeconds) {
// parameter validation
if ((checkRead==null || checkRead.Count==0) && (checkWrite==null || checkWrite.Count==0) && (checkError==null || checkError.Count==0)) {
throw new ArgumentNullException(SR.GetString(SR.net_sockets_empty_select));
}
const int MaxSelect = 65536;
if (checkRead!=null && checkRead.Count>MaxSelect) {
throw new ArgumentOutOfRangeException("checkRead", SR.GetString(SR.net_sockets_toolarge_select, "checkRead", MaxSelect.ToString(NumberFormatInfo.CurrentInfo)));
}
if (checkWrite!=null && checkWrite.Count>MaxSelect) {
throw new ArgumentOutOfRangeException("checkWrite", SR.GetString(SR.net_sockets_toolarge_select, "checkWrite", MaxSelect.ToString(NumberFormatInfo.CurrentInfo)));
}
if (checkError!=null && checkError.Count>MaxSelect) {
throw new ArgumentOutOfRangeException("checkError", SR.GetString(SR.net_sockets_toolarge_select, "checkError", MaxSelect.ToString(NumberFormatInfo.CurrentInfo)));
}
IntPtr[] readfileDescriptorSet = SocketListToFileDescriptorSet(checkRead);
IntPtr[] writefileDescriptorSet = SocketListToFileDescriptorSet(checkWrite);
IntPtr[] errfileDescriptorSet = SocketListToFileDescriptorSet(checkError);
// This code used to erroneously pass a non-null timeval structure containing zeroes
// to select() when the caller specified (-1) for the microseconds parameter. That
// caused select to actually have a *zero* timeout instead of an infinite timeout
// turning the operation into a non-blocking poll.
//
// Now we pass a null timeval struct when microseconds is (-1).
//
// Negative microsecond values that weren't exactly (-1) were originally successfully
// converted to a timeval struct containing unsigned non-zero integers. This code
// retains that behavior so that any app working around the original bug with,
// for example, (-2) specified for microseconds, will continue to get the same behavior.
int socketCount;
if (microSeconds != -1) {
TimeValue IOwait = new TimeValue();
MicrosecondsToTimeValue((long)(uint)microSeconds, ref IOwait);
socketCount =
UnsafeNclNativeMethods.OSSOCK.select(
0, // ignored value
readfileDescriptorSet,
writefileDescriptorSet,
errfileDescriptorSet,
ref IOwait);
}
else {
socketCount =
UnsafeNclNativeMethods.OSSOCK.select(
0, // ignored value
readfileDescriptorSet,
writefileDescriptorSet,
errfileDescriptorSet,
IntPtr.Zero);
}
GlobalLog.Print("Socket::Select() UnsafeNclNativeMethods.OSSOCK.select returns socketCount:" + socketCount);
//
// if the native call fails we'll throw a SocketException
//
if ((SocketError)socketCount==SocketError.SocketError) {
throw new SocketException();
}
SelectFileDescriptor(checkRead, readfileDescriptorSet);
SelectFileDescriptor(checkWrite, writefileDescriptorSet);
SelectFileDescriptor(checkError, errfileDescriptorSet);
}
private static void MicrosecondsToTimeValue(long microSeconds, ref TimeValue socketTime) {
socketTime.Seconds = (int) (microSeconds / microcnv);
socketTime.Microseconds = (int) (microSeconds % microcnv);
}
/// <include file='doc\Socket.uex' path='docs/doc[@for="Socket.Select"]/*' />
/// <devdoc>
/// <para>Determines the status of a socket.</para>
/// </devdoc>
public static void Select(
IList checkRead,
IList checkWrite,
IList checkError,
int microSeconds) {
//
// parameter validation
//
if ((checkRead==null || checkRead.Count==0) && (checkWrite==null || checkWrite.Count==0) && (checkError==null || checkError.Count==0)) {
throw new ArgumentNullException(SR.GetString(SR.net_sockets_empty_select));
}
FileDescriptorSet readfileDescriptorSet, writefileDescriptorSet, errfileDescriptorSet;
readfileDescriptorSet = SocketListToFileDescriptorSet(checkRead);
writefileDescriptorSet = SocketListToFileDescriptorSet(checkWrite);
errfileDescriptorSet = SocketListToFileDescriptorSet(checkError);
TimeValue IOwait = new TimeValue();
MicrosecondsToTimeValue(microSeconds, ref IOwait);
int errorCode =
UnsafeNclNativeMethods.OSSOCK.select(
0, // ignored value
ref readfileDescriptorSet,
ref writefileDescriptorSet,
ref errfileDescriptorSet,
ref IOwait);
//
// if the native call fails we'll throw a SocketException
//
if (errorCode==SocketErrors.SocketError) {
throw new SocketException();
}
//
// call SelectFileDescriptor to update the IList instances,
// and keep count of how many sockets are ready
//
int totalReadySockets = 0;
totalReadySockets += SelectFileDescriptor(checkRead, readfileDescriptorSet);
totalReadySockets += SelectFileDescriptor(checkWrite, writefileDescriptorSet);
totalReadySockets += SelectFileDescriptor(checkError, errfileDescriptorSet);
}
/// <devdoc>
/// <para>
/// Determines the status of the socket.
/// </para>
/// </devdoc>
public bool Poll(int microSeconds, SelectMode mode) {
if (CleanedUp) {
throw new ObjectDisposedException(this.GetType().FullName);
}
IntPtr handle = m_Handle.DangerousGetHandle();
IntPtr[] fileDescriptorSet = new IntPtr[2] { (IntPtr) 1, handle };
TimeValue IOwait = new TimeValue();
//
// negative timeout value implies indefinite wait
//
int socketCount;
if (microSeconds != -1) {
MicrosecondsToTimeValue((long)(uint)microSeconds, ref IOwait);
socketCount =
UnsafeNclNativeMethods.OSSOCK.select(
0,
mode==SelectMode.SelectRead ? fileDescriptorSet : null,
mode==SelectMode.SelectWrite ? fileDescriptorSet : null,
mode==SelectMode.SelectError ? fileDescriptorSet : null,
ref IOwait);
}
else {
socketCount =
UnsafeNclNativeMethods.OSSOCK.select(
0,
mode==SelectMode.SelectRead ? fileDescriptorSet : null,
mode==SelectMode.SelectWrite ? fileDescriptorSet : null,
mode==SelectMode.SelectError ? fileDescriptorSet : null,
IntPtr.Zero);
}
GlobalLog.Print("Socket#" + ValidationHelper.HashString(this) + "::Poll() UnsafeNclNativeMethods.OSSOCK.select returns socketCount:" + socketCount);
//
// if the native call fails we'll throw a SocketException
//
if ((SocketError)socketCount==SocketError.SocketError) {
//
// update our internal state after this socket error and throw
//
SocketException socketException = new SocketException();
UpdateStatusAfterSocketError(socketException);
if(s_LoggingEnabled)Logging.Exception(Logging.Sockets, this, "Poll", socketException);
throw socketException;
}
if ((int)fileDescriptorSet[0]==0) {
return false;
}
return fileDescriptorSet[1] == handle;
}
private void ReadImpl()
{
List<IntPtr> dead = null, active = new List<IntPtr>();
List<ISocketCallback> activeCallbacks = new List<ISocketCallback>();
IntPtr[] readSockets = EmptyPointers, errorSockets = EmptyPointers;
long lastHeartbeat = Environment.TickCount;
SocketPair[] allSocketPairs = null;
while (true)
{
managerState = ManagerState.CheckForHeartbeat;
active.Clear();
activeCallbacks.Clear();
if (dead != null) dead.Clear();
// this check is actually a pace-maker; sometimes the Timer callback stalls for
// extended periods of time, which can cause socket disconnect
long now = Environment.TickCount;
if (unchecked(now - lastHeartbeat) >= 15000)
{
managerState = ManagerState.ExecuteHeartbeat;
lastHeartbeat = now;
lock (socketLookup)
{
if (allSocketPairs == null || allSocketPairs.Length != socketLookup.Count)
allSocketPairs = new SocketPair[socketLookup.Count];
socketLookup.Values.CopyTo(allSocketPairs, 0);
}
foreach (var pair in allSocketPairs)
{
var callback = pair.Callback;
if (callback != null) try { callback.OnHeartbeat(); } catch { }
}
}
managerState = ManagerState.LocateActiveSockets;
lock (socketLookup)
{
if (isDisposed) return;
if (socketLookup.Count == 0)
{
// if empty, give it a few seconds chance before exiting
managerState = ManagerState.NoSocketsPause;
Monitor.Wait(socketLookup, TimeSpan.FromSeconds(20));
if (socketLookup.Count == 0) return; // nothing new came in, so exit
}
managerState = ManagerState.PrepareActiveSockets;
foreach (var pair in socketLookup)
{
var socket = pair.Value.Socket;
if (socket.Handle == pair.Key && socket.Connected)
if (pair.Value.Socket.Connected)
{
active.Add(pair.Key);
activeCallbacks.Add(pair.Value.Callback);
}
else
{
(dead ?? (dead = new List<IntPtr>())).Add(pair.Key);
}
}
if (dead != null && dead.Count != 0)
{
managerState = ManagerState.CullDeadSockets;
foreach (var socket in dead) socketLookup.Remove(socket);
}
}
int pollingSockets = active.Count;
if (pollingSockets == 0)
{
// nobody had actual sockets; just sleep
managerState = ManagerState.NoActiveSocketsPause;
Thread.Sleep(10);
continue;
}
if (readSockets.Length < active.Count + 1)
{
managerState = ManagerState.GrowingSocketArray;
ConnectionMultiplexer.TraceWithoutContext("Resizing socket array for " + active.Count + " sockets");
readSockets = new IntPtr[active.Count + 6]; // leave so space for growth
errorSockets = new IntPtr[active.Count + 6];
}
managerState = ManagerState.CopyingPointersForSelect;
readSockets[0] = errorSockets[0] = (IntPtr)active.Count;
active.CopyTo(readSockets, 1);
active.CopyTo(errorSockets, 1);
int ready;
try
{
var timeout = new TimeValue(1000);
managerState = ManagerState.ExecuteSelect;
ready = select(0, readSockets, null, errorSockets, ref timeout);
managerState = ManagerState.ExecuteSelectComplete;
if (ready <= 0) // -ve typically means a socket was disposed just before; just retry
{
bool hasWorkToDo = false;
if (ready == 0)
{
managerState = ManagerState.CheckForStaleConnections;
foreach (var s in activeCallbacks)
{
if (s.IsDataAvailable)
{
hasWorkToDo = true;
}
else
{
s.CheckForStaleConnection();
}
}
}
else
{
lastErrorTicks = Environment.TickCount;
}
if (!hasWorkToDo)
{
continue;
}
}
ConnectionMultiplexer.TraceWithoutContext((int)readSockets[0] != 0, "Read sockets: " + (int)readSockets[0]);
ConnectionMultiplexer.TraceWithoutContext((int)errorSockets[0] != 0, "Error sockets: " + (int)errorSockets[0]);
}
catch (Exception ex)
{ // this typically means a socket was disposed just before; just retry
Trace.WriteLine(ex.Message);
continue;
}
bool haveWork = false;
int queueCount = (int)readSockets[0];
if (queueCount != 0)
{
managerState = ManagerState.EnqueueRead;
lock (readQueue)
{
for (int i = 1; i <= queueCount; i++)
{
var callback = GetCallback(readSockets[i]);
if (callback != null)
{
readQueue.Enqueue(callback);
haveWork = true;
}
}
}
}
queueCount = (int)errorSockets[0];
if (queueCount != 0)
{
managerState = ManagerState.EnqueueError;
lock (errorQueue)
{
for (int i = 1; i <= queueCount; i++)
{
var callback = GetCallback(errorSockets[i]);
if (callback != null)
{
errorQueue.Enqueue(callback);
haveWork = true;
}
}
}
}
if(!haveWork)
{
// edge case: select is returning 0, but data could still be available
managerState = ManagerState.EnqueueReadFallback;
lock (readQueue)
{
foreach (var callback in activeCallbacks)
{
if(callback.IsDataAvailable)
{
readQueue.Enqueue(callback);
}
}
}
}
if (ready >= 5) // number of sockets we should attempt to process by ourself before asking for help
{
// seek help, work in parallel, then synchronize
var obj = new QueueDrainSyncLock(this);
lock (obj)
{
managerState = ManagerState.RequestAssistance;
ThreadPool.QueueUserWorkItem(HelpProcessItems, obj);
managerState = ManagerState.ProcessQueues;
ProcessItems(true);
if (!obj.Consume())
{ // then our worker arrived and picked up work; we need
// to let it finish; note that if it *didn't* get that far
// yet, the Consume() call will mean that it never tries
Monitor.Wait(obj);
}
}
}
else
{
// just do it ourself
managerState = ManagerState.ProcessQueues;
ProcessItems(true);
}
}
}
/// <include file='doc\Socket.uex' path='docs/doc[@for="Socket.Poll"]/*' />
/// <devdoc>
/// <para>
/// Determines the status of the socket.
/// </para>
/// </devdoc>
public bool Poll(int microSeconds, SelectMode mode) {
if (CleanedUp) {
throw new ObjectDisposedException(this.GetType().FullName);
}
FileDescriptorSet fileDescriptorSet = new FileDescriptorSet(1);
fileDescriptorSet.Array[0] = m_Handle;
TimeValue IOwait = new TimeValue();
//
// negative timeout value implies indefinite wait
//
if (microSeconds>=0) {
MicrosecondsToTimeValue(microSeconds, ref IOwait);
}
int errorCode;
switch (mode) {
case SelectMode.SelectRead:
errorCode = (microSeconds>=0)
? UnsafeNclNativeMethods.OSSOCK.select(
0,
ref fileDescriptorSet,
IntPtr.Zero,
IntPtr.Zero,
ref IOwait)
: UnsafeNclNativeMethods.OSSOCK.select(
0,
ref fileDescriptorSet,
IntPtr.Zero,
IntPtr.Zero,
IntPtr.Zero);
break;
case SelectMode.SelectWrite:
errorCode = (microSeconds>=0)
? UnsafeNclNativeMethods.OSSOCK.select(
0,
IntPtr.Zero,
ref fileDescriptorSet,
IntPtr.Zero,
ref IOwait)
: UnsafeNclNativeMethods.OSSOCK.select(
0,
IntPtr.Zero,
ref fileDescriptorSet,
IntPtr.Zero,
IntPtr.Zero);
break;
case SelectMode.SelectError:
errorCode = (microSeconds>=0)
? UnsafeNclNativeMethods.OSSOCK.select(
0,
IntPtr.Zero,
IntPtr.Zero,
ref fileDescriptorSet,
ref IOwait)
: UnsafeNclNativeMethods.OSSOCK.select(
0,
IntPtr.Zero,
IntPtr.Zero,
ref fileDescriptorSet,
IntPtr.Zero);
break;
default:
throw new NotSupportedException(SR.GetString(SR.net_SelectModeNotSupportedException, mode.ToString()));
};
//
// if the native call fails we'll throw a SocketException
//
if (errorCode==SocketErrors.SocketError) {
//
// update our internal state after this socket error and throw
//
SocketException socketException = new SocketException();
UpdateStatusAfterSocketError();
throw socketException;
}
if (fileDescriptorSet.Count==0) {
return false;
}
//return (fileDescriptorSet.Count!=0);
return fileDescriptorSet.Array[0]==m_Handle;
}
/// <summary>
/// Determines the status of one or more sockets.
/// </summary>
/// <param name="checkRead">An <see cref="T:System.Collections.IList"/> of <see cref="T:System.Net.Sockets.Socket"/> instances to check for readability. </param><param name="checkWrite">An <see cref="T:System.Collections.IList"/> of <see cref="T:System.Net.Sockets.Socket"/> instances to check for writability. </param><param name="checkError">An <see cref="T:System.Collections.IList"/> of <see cref="T:System.Net.Sockets.Socket"/> instances to check for errors. </param><param name="microSeconds">The time-out value, in microseconds. A -1 value indicates an infinite time-out.</param><exception cref="T:System.ArgumentNullException">The <paramref name="checkRead"/> parameter is null or empty.-and- The <paramref name="checkWrite"/> parameter is null or empty -and- The <paramref name="checkError"/> parameter is null or empty. </exception><exception cref="T:System.Net.Sockets.SocketException">An error occurred when attempting to access the socket. See the Remarks section for more information. </exception>
public static void Select(IList checkRead, IList checkWrite, IList checkError, int microSeconds)
{
if ((checkRead == null || checkRead.Count == 0) && (checkWrite == null || checkWrite.Count == 0) && (checkError == null || checkError.Count == 0))
throw new ArgumentNullException(SR.GetString("net_sockets_empty_select"));
if (checkRead != null && checkRead.Count > 65536)
throw new ArgumentOutOfRangeException("checkRead", SR.GetString("net_sockets_toolarge_select", (object) "checkRead", (object) 65536.ToString((IFormatProvider) NumberFormatInfo.CurrentInfo)));
else if (checkWrite != null && checkWrite.Count > 65536)
throw new ArgumentOutOfRangeException("checkWrite", SR.GetString("net_sockets_toolarge_select", (object) "checkWrite", (object) 65536.ToString((IFormatProvider) NumberFormatInfo.CurrentInfo)));
else if (checkError != null && checkError.Count > 65536)
{
throw new ArgumentOutOfRangeException("checkError", SR.GetString("net_sockets_toolarge_select", (object) "checkError", (object) 65536.ToString((IFormatProvider) NumberFormatInfo.CurrentInfo)));
}
else
{
IntPtr[] numArray1 = Socket.SocketListToFileDescriptorSet(checkRead);
IntPtr[] numArray2 = Socket.SocketListToFileDescriptorSet(checkWrite);
IntPtr[] numArray3 = Socket.SocketListToFileDescriptorSet(checkError);
int num;
if (microSeconds != -1)
{
TimeValue timeValue = new TimeValue();
Socket.MicrosecondsToTimeValue((long) (uint) microSeconds, ref timeValue);
num = UnsafeNclNativeMethods.OSSOCK.select(0, numArray1, numArray2, numArray3, ref timeValue);
}
else
num = UnsafeNclNativeMethods.OSSOCK.select(0, numArray1, numArray2, numArray3, IntPtr.Zero);
if (num == -1)
throw new SocketException();
Socket.SelectFileDescriptor(checkRead, numArray1);
Socket.SelectFileDescriptor(checkWrite, numArray2);
Socket.SelectFileDescriptor(checkError, numArray3);
}
}
/// <summary>
/// Determines the status of the <see cref="T:System.Net.Sockets.Socket"/>.
/// </summary>
///
/// <returns>
/// The status of the <see cref="T:System.Net.Sockets.Socket"/> based on the polling mode value passed in the <paramref name="mode"/> parameter.Mode Return Value <see cref="F:System.Net.Sockets.SelectMode.SelectRead"/>true if <see cref="M:System.Net.Sockets.Socket.Listen(System.Int32)"/> has been called and a connection is pending; -or- true if data is available for reading; -or- true if the connection has been closed, reset, or terminated; otherwise, returns false. <see cref="F:System.Net.Sockets.SelectMode.SelectWrite"/>true, if processing a <see cref="M:System.Net.Sockets.Socket.Connect(System.Net.EndPoint)"/>, and the connection has succeeded; -or- true if data can be sent; otherwise, returns false. <see cref="F:System.Net.Sockets.SelectMode.SelectError"/>true if processing a <see cref="M:System.Net.Sockets.Socket.Connect(System.Net.EndPoint)"/> that does not block, and the connection has failed; -or- true if <see cref="F:System.Net.Sockets.SocketOptionName.OutOfBandInline"/> is not set and out-of-band data is available; otherwise, returns false.
/// </returns>
/// <param name="microSeconds">The time to wait for a response, in microseconds. </param><param name="mode">One of the <see cref="T:System.Net.Sockets.SelectMode"/> values. </param><exception cref="T:System.NotSupportedException">The <paramref name="mode"/> parameter is not one of the <see cref="T:System.Net.Sockets.SelectMode"/> values. </exception><exception cref="T:System.Net.Sockets.SocketException">An error occurred when attempting to access the socket. See remarks below. </exception><exception cref="T:System.ObjectDisposedException">The <see cref="T:System.Net.Sockets.Socket"/> has been closed. </exception><PermissionSet><IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true"/><IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true"/><IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence"/></PermissionSet>
public bool Poll(int microSeconds, SelectMode mode)
{
if (this.CleanedUp)
throw new ObjectDisposedException(this.GetType().FullName);
IntPtr handle = this.m_Handle.DangerousGetHandle();
IntPtr[] numArray = new IntPtr[2]
{
(IntPtr) 1,
handle
};
TimeValue timeValue = new TimeValue();
int num;
if (microSeconds != -1)
{
Socket.MicrosecondsToTimeValue((long) (uint) microSeconds, ref timeValue);
num = UnsafeNclNativeMethods.OSSOCK.select(0, mode == SelectMode.SelectRead ? numArray : (IntPtr[]) null, mode == SelectMode.SelectWrite ? numArray : (IntPtr[]) null, mode == SelectMode.SelectError ? numArray : (IntPtr[]) null, ref timeValue);
}
else
num = UnsafeNclNativeMethods.OSSOCK.select(0, mode == SelectMode.SelectRead ? numArray : (IntPtr[]) null, mode == SelectMode.SelectWrite ? numArray : (IntPtr[]) null, mode == SelectMode.SelectError ? numArray : (IntPtr[]) null, IntPtr.Zero);
if (num == -1)
{
SocketException socketException = new SocketException();
this.UpdateStatusAfterSocketError(socketException);
if (Socket.s_LoggingEnabled)
Logging.Exception(Logging.Sockets, (object) this, "Poll", (Exception) socketException);
throw socketException;
}
else if ((int) numArray[0] == 0)
return false;
else
return numArray[1] == handle;
}
/// <devdoc>
/// <para>Determines the status of a socket.</para>
/// </devdoc>
public static void Select(IList checkRead, IList checkWrite, IList checkError, int microSeconds)
{
// parameter validation
if ((checkRead==null || checkRead.Count==0) && (checkWrite==null || checkWrite.Count==0) && (checkError==null || checkError.Count==0)) {
throw new ArgumentNullException(SR.GetString(SR.net_sockets_empty_select));
}
const int MaxSelect = 65536;
if (checkRead!=null && checkRead.Count>MaxSelect) {
throw new ArgumentOutOfRangeException(SR.GetString(SR.net_sockets_toolarge_select, "checkRead", MaxSelect.ToString(NumberFormatInfo.CurrentInfo)));
}
if (checkWrite!=null && checkWrite.Count>MaxSelect) {
throw new ArgumentOutOfRangeException(SR.GetString(SR.net_sockets_toolarge_select, "checkWrite", MaxSelect.ToString(NumberFormatInfo.CurrentInfo)));
}
if (checkError!=null && checkError.Count>MaxSelect) {
throw new ArgumentOutOfRangeException(SR.GetString(SR.net_sockets_toolarge_select, "checkError", MaxSelect.ToString(NumberFormatInfo.CurrentInfo)));
}
IntPtr[] readfileDescriptorSet = SocketListToFileDescriptorSet(checkRead);
IntPtr[] writefileDescriptorSet = SocketListToFileDescriptorSet(checkWrite);
IntPtr[] errfileDescriptorSet = SocketListToFileDescriptorSet(checkError);
TimeValue IOwait = new TimeValue();
// if negative, assume infinite
if (microSeconds != -1) {
MicrosecondsToTimeValue((long)(uint)microSeconds, ref IOwait);
}
int socketCount =
UnsafeNclNativeMethods.OSSOCK.select(
0, // ignored value
readfileDescriptorSet,
writefileDescriptorSet,
errfileDescriptorSet,
ref IOwait);
GlobalLog.Print("Socket::Select() UnsafeNclNativeMethods.OSSOCK.select returns socketCount:" + socketCount);
//
// if the native call fails we'll throw a SocketException
//
if ((SocketError)socketCount==SocketError.SocketError) {
throw new SocketException();
}
SelectFileDescriptor(checkRead, readfileDescriptorSet);
SelectFileDescriptor(checkWrite, writefileDescriptorSet);
SelectFileDescriptor(checkError, errfileDescriptorSet);
}
public static void Select(IList checkRead, IList checkWrite, IList checkError, int microSeconds)
{
int num;
if ((((checkRead == null) || (checkRead.Count == 0)) && ((checkWrite == null) || (checkWrite.Count == 0))) && ((checkError == null) || (checkError.Count == 0)))
{
throw new ArgumentNullException(SR.GetString("net_sockets_empty_select"));
}
if ((checkRead != null) && (checkRead.Count > 0x10000))
{
object[] args = new object[] { "checkRead", 0x10000.ToString(NumberFormatInfo.CurrentInfo) };
throw new ArgumentOutOfRangeException("checkRead", SR.GetString("net_sockets_toolarge_select", args));
}
if ((checkWrite != null) && (checkWrite.Count > 0x10000))
{
object[] objArray2 = new object[] { "checkWrite", 0x10000.ToString(NumberFormatInfo.CurrentInfo) };
throw new ArgumentOutOfRangeException("checkWrite", SR.GetString("net_sockets_toolarge_select", objArray2));
}
if ((checkError != null) && (checkError.Count > 0x10000))
{
object[] objArray3 = new object[] { "checkError", 0x10000.ToString(NumberFormatInfo.CurrentInfo) };
throw new ArgumentOutOfRangeException("checkError", SR.GetString("net_sockets_toolarge_select", objArray3));
}
IntPtr[] readfds = SocketListToFileDescriptorSet(checkRead);
IntPtr[] writefds = SocketListToFileDescriptorSet(checkWrite);
IntPtr[] exceptfds = SocketListToFileDescriptorSet(checkError);
if (microSeconds != -1)
{
TimeValue socketTime = new TimeValue();
MicrosecondsToTimeValue((long) ((ulong) microSeconds), ref socketTime);
num = UnsafeNclNativeMethods.OSSOCK.select(0, readfds, writefds, exceptfds, ref socketTime);
}
else
{
num = UnsafeNclNativeMethods.OSSOCK.select(0, readfds, writefds, exceptfds, IntPtr.Zero);
}
if (num == -1)
{
throw new SocketException();
}
SelectFileDescriptor(checkRead, readfds);
SelectFileDescriptor(checkWrite, writefds);
SelectFileDescriptor(checkError, exceptfds);
}
public bool Poll(int microSeconds, SelectMode mode)
{
int num;
if (this.CleanedUp)
{
throw new ObjectDisposedException(base.GetType().FullName);
}
IntPtr handle = this.m_Handle.DangerousGetHandle();
IntPtr[] ptrArray = new IntPtr[] { (IntPtr) 1, handle };
TimeValue socketTime = new TimeValue();
if (microSeconds != -1)
{
MicrosecondsToTimeValue((long) ((ulong) microSeconds), ref socketTime);
num = UnsafeNclNativeMethods.OSSOCK.select(0, (mode == SelectMode.SelectRead) ? ptrArray : null, (mode == SelectMode.SelectWrite) ? ptrArray : null, (mode == SelectMode.SelectError) ? ptrArray : null, ref socketTime);
}
else
{
num = UnsafeNclNativeMethods.OSSOCK.select(0, (mode == SelectMode.SelectRead) ? ptrArray : null, (mode == SelectMode.SelectWrite) ? ptrArray : null, (mode == SelectMode.SelectError) ? ptrArray : null, IntPtr.Zero);
}
if (num == -1)
{
SocketException socketException = new SocketException();
this.UpdateStatusAfterSocketError(socketException);
if (s_LoggingEnabled)
{
Logging.Exception(Logging.Sockets, this, "Poll", socketException);
}
throw socketException;
}
if (((int) ptrArray[0]) == 0)
{
return false;
}
return (ptrArray[1] == handle);
}
