Jo Shields 3c1f479b9d Imported Upstream version 4.0.0~alpha1
Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9
2015-04-07 09:35:12 +01:00

277 lines
9.5 KiB
C#

//
// System.Threading.ThreadPool.cs
//
// Author:
// Patrik Torstensson
// Dick Porter (dick@ximian.com)
// Maurer Dietmar (dietmar@ximian.com)
//
// (C) Ximian, Inc. http://www.ximian.com
// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Collections;
using System.Collections.Generic;
using System.Globalization;
using System.Runtime.CompilerServices;
using System.Runtime.Remoting.Messaging;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Permissions;
namespace System.Threading {
// Extracted from ../../../../external/referencesource/mscorlib/system/threading/threadpool.cs
//
// Interface to something that can be queued to the TP. This is implemented by
// QueueUserWorkItemCallback, Task, and potentially other internal types.
// For example, SemaphoreSlim represents callbacks using its own type that
// implements IThreadPoolWorkItem.
//
// If we decide to expose some of the workstealing
// stuff, this is NOT the thing we want to expose to the public.
//
internal interface IThreadPoolWorkItem
{
[SecurityCritical]
void ExecuteWorkItem();
[SecurityCritical]
void MarkAborted(ThreadAbortException tae);
}
public static class ThreadPool {
[Obsolete("This method is obsolete, use BindHandle(SafeHandle) instead")]
public static bool BindHandle (IntPtr osHandle)
{
return true;
}
public static bool BindHandle (SafeHandle osHandle)
{
if (osHandle == null)
throw new ArgumentNullException ("osHandle");
return true;
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public static extern void GetAvailableThreads (out int workerThreads, out int completionPortThreads);
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public static extern void GetMaxThreads (out int workerThreads, out int completionPortThreads);
[MethodImplAttribute(MethodImplOptions.InternalCall)]
public static extern void GetMinThreads (out int workerThreads, out int completionPortThreads);
[MonoTODO("The min number of completion port threads is not evaluated.")]
[MethodImplAttribute(MethodImplOptions.InternalCall)]
[SecurityPermission (SecurityAction.Demand, ControlThread=true)]
public static extern bool SetMinThreads (int workerThreads, int completionPortThreads);
[MethodImplAttribute(MethodImplOptions.InternalCall)]
[SecurityPermission (SecurityAction.Demand, ControlThread=true)]
public static extern bool SetMaxThreads (int workerThreads, int completionPortThreads);
public static bool QueueUserWorkItem (WaitCallback callBack)
{
return QueueUserWorkItem (callBack, null);
}
public static bool QueueUserWorkItem (WaitCallback callBack, object state)
{
if (callBack == null)
throw new ArgumentNullException ("callBack");
if (callBack.IsTransparentProxy ()) {
IAsyncResult ar = callBack.BeginInvoke (state, null, null);
if (ar == null)
return false;
} else {
AsyncResult ares = new AsyncResult (callBack, state, true);
pool_queue (ares);
}
return true;
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
static extern void pool_queue (AsyncResult ares);
// TODO: It should be interface interface only to avoid extra allocation
internal static void QueueWorkItem (WaitCallback callBack, object state)
{
pool_queue (new AsyncResult (callBack, state, false));
}
public static RegisteredWaitHandle RegisterWaitForSingleObject (WaitHandle waitObject,
WaitOrTimerCallback callBack,
object state,
int millisecondsTimeOutInterval,
bool executeOnlyOnce)
{
return RegisterWaitForSingleObject (waitObject, callBack, state,
(long) millisecondsTimeOutInterval, executeOnlyOnce);
}
public static RegisteredWaitHandle RegisterWaitForSingleObject (WaitHandle waitObject,
WaitOrTimerCallback callBack,
object state,
long millisecondsTimeOutInterval,
bool executeOnlyOnce)
{
if (waitObject == null)
throw new ArgumentNullException ("waitObject");
if (callBack == null)
throw new ArgumentNullException ("callBack");
if (millisecondsTimeOutInterval < -1)
throw new ArgumentOutOfRangeException ("timeout", "timeout < -1");
if (millisecondsTimeOutInterval > Int32.MaxValue)
throw new NotSupportedException ("Timeout is too big. Maximum is Int32.MaxValue");
TimeSpan timeout = new TimeSpan (0, 0, 0, 0, (int) millisecondsTimeOutInterval);
RegisteredWaitHandle waiter = new RegisteredWaitHandle (waitObject, callBack, state,
timeout, executeOnlyOnce);
QueueUserWorkItem (new WaitCallback (waiter.Wait), null);
return waiter;
}
public static RegisteredWaitHandle RegisterWaitForSingleObject (WaitHandle waitObject,
WaitOrTimerCallback callBack,
object state,
TimeSpan timeout,
bool executeOnlyOnce)
{
return RegisterWaitForSingleObject (waitObject, callBack, state,
(long) timeout.TotalMilliseconds, executeOnlyOnce);
}
[CLSCompliant(false)]
public static RegisteredWaitHandle RegisterWaitForSingleObject (WaitHandle waitObject,
WaitOrTimerCallback callBack,
object state,
uint millisecondsTimeOutInterval,
bool executeOnlyOnce)
{
return RegisterWaitForSingleObject (waitObject, callBack, state,
(long) millisecondsTimeOutInterval, executeOnlyOnce);
}
[CLSCompliant (false)]
unsafe public static bool UnsafeQueueNativeOverlapped (NativeOverlapped *overlapped)
{
throw new NotImplementedException ();
}
#if !NET_2_1 || MOBILE
[SecurityPermission (SecurityAction.Demand, ControlEvidence=true, ControlPolicy=true)]
public static bool UnsafeQueueUserWorkItem (WaitCallback callBack, object state)
{
if (callBack == null)
throw new ArgumentNullException ("callBack");
// no stack propagation here (that's why it's unsafe and requires extra security permissions)
if (!callBack.IsTransparentProxy ()) {
AsyncResult ares = new AsyncResult (callBack, state, false);
pool_queue (ares);
return true;
}
try {
if (!ExecutionContext.IsFlowSuppressed ())
ExecutionContext.SuppressFlow (); // on current thread only
IAsyncResult ar = callBack.BeginInvoke (state, null, null);
if (ar == null)
return false;
} finally {
if (ExecutionContext.IsFlowSuppressed ())
ExecutionContext.RestoreFlow ();
}
return true;
}
[MonoTODO("Not implemented")]
[SecurityPermission (SecurityAction.Demand, ControlEvidence=true, ControlPolicy=true)]
public static RegisteredWaitHandle UnsafeRegisterWaitForSingleObject (WaitHandle waitObject,
WaitOrTimerCallback callBack, object state, int millisecondsTimeOutInterval,
bool executeOnlyOnce)
{
throw new NotImplementedException ();
}
[MonoTODO("Not implemented")]
[SecurityPermission (SecurityAction.Demand, ControlEvidence=true, ControlPolicy=true)]
public static RegisteredWaitHandle UnsafeRegisterWaitForSingleObject (WaitHandle waitObject,
WaitOrTimerCallback callBack, object state, long millisecondsTimeOutInterval,
bool executeOnlyOnce)
{
throw new NotImplementedException ();
}
[MonoTODO("Not implemented")]
[SecurityPermission (SecurityAction.Demand, ControlEvidence=true, ControlPolicy=true)]
public static RegisteredWaitHandle UnsafeRegisterWaitForSingleObject (WaitHandle waitObject,
WaitOrTimerCallback callBack, object state, TimeSpan timeout,
bool executeOnlyOnce)
{
throw new NotImplementedException ();
}
[MonoTODO("Not implemented")]
[CLSCompliant (false)]
[SecurityPermission (SecurityAction.Demand, ControlEvidence=true, ControlPolicy=true)]
public static RegisteredWaitHandle UnsafeRegisterWaitForSingleObject (WaitHandle waitObject,
WaitOrTimerCallback callBack, object state, uint millisecondsTimeOutInterval,
bool executeOnlyOnce)
{
throw new NotImplementedException ();
}
#endif
#region ReferenceSources
// Extracted from ../../../../external/referencesource/mscorlib/system/threading/threadpool.cs
internal static void UnsafeQueueCustomWorkItem(IThreadPoolWorkItem workItem, bool forceGlobal)
{
QueueWorkItem ((obj) => ((IThreadPoolWorkItem)obj).ExecuteWorkItem (), workItem);
}
internal static IEnumerable<IThreadPoolWorkItem> GetQueuedWorkItems()
{
yield break;
}
internal static bool TryPopCustomWorkItem(IThreadPoolWorkItem workItem)
{
return false;
}
internal static void NotifyWorkItemProgress()
{
}
#endregion
}
}