Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / System.Runtime.DurableInstancing / System / Runtime / DurableInstancing / InstanceStore.cs / 1305376 / InstanceStore.cs
//----------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//---------------------------------------------------------------
namespace System.Runtime.DurableInstancing
{
using System;
using System.Collections.Generic;
using System.Linq;
using System.Transactions;
using System.Xml.Linq;
// Persistence Lock Order:
// InstanceHandle.ThisLock then InstanceStore.ThisLock
// InstanceHandle.ThisLock then InstanceOwner.HandlesLock
[Fx.Tag.XamlVisible(false)]
public abstract class InstanceStore
{
readonly Dictionary owners = new Dictionary(1);
Guid[] ownerKeysToScan = new Guid[0];
int ownerKeysIndexToScan = 0;
protected InstanceStore()
{
}
object ThisLock
{
get
{
return this.owners;
}
}
public InstanceOwner DefaultInstanceOwner { get; set; }
public InstanceHandle CreateInstanceHandle()
{
return CreateInstanceHandle(DefaultInstanceOwner);
}
public InstanceHandle CreateInstanceHandle(InstanceOwner owner)
{
return PrepareInstanceHandle(new InstanceHandle(this, owner));
}
public InstanceHandle CreateInstanceHandle(Guid instanceId)
{
return CreateInstanceHandle(DefaultInstanceOwner, instanceId);
}
public InstanceHandle CreateInstanceHandle(InstanceOwner owner, Guid instanceId)
{
if (instanceId == Guid.Empty)
{
throw Fx.Exception.Argument("instanceId", SRCore.CannotCreateContextWithNullId);
}
return PrepareInstanceHandle(new InstanceHandle(this, owner, instanceId));
}
[Fx.Tag.Throws.Timeout("The operation timed out; the InstanceHandle is no longer valid.")]
[Fx.Tag.Throws(typeof(OperationCanceledException), "The operation was canceled; the InstanceHandle is no longer valid.")]
[Fx.Tag.Throws(typeof(InstancePersistenceException), "A command failed.")]
[Fx.Tag.Throws(typeof(TransactionException), "The transaction in use for the command failed.")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle))]
public InstanceView Execute(InstanceHandle handle, InstancePersistenceCommand command, TimeSpan timeout)
{
if (command == null)
{
throw Fx.Exception.ArgumentNull("command");
}
if (handle == null)
{
throw Fx.Exception.ArgumentNull("handle");
}
if (!object.ReferenceEquals(this, handle.Store))
{
throw Fx.Exception.Argument("handle", SRCore.ContextNotFromThisStore);
}
TimeoutHelper.ThrowIfNegativeArgument(timeout);
return InstancePersistenceContext.OuterExecute(handle, command, Transaction.Current, timeout);
}
[Fx.Tag.InheritThrows(From = "Execute")]
public IAsyncResult BeginExecute(InstanceHandle handle, InstancePersistenceCommand command, TimeSpan timeout, AsyncCallback callback, object state)
{
if (command == null)
{
throw Fx.Exception.ArgumentNull("command");
}
if (handle == null)
{
throw Fx.Exception.ArgumentNull("handle");
}
if (!object.ReferenceEquals(this, handle.Store))
{
throw Fx.Exception.Argument("handle", SRCore.ContextNotFromThisStore);
}
TimeoutHelper.ThrowIfNegativeArgument(timeout);
return InstancePersistenceContext.BeginOuterExecute(handle, command, Transaction.Current, timeout, callback, state);
}
[Fx.Tag.InheritThrows(From = "Execute")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle), Conditional = "!result.IsCompleted")]
public InstanceView EndExecute(IAsyncResult result)
{
return InstancePersistenceContext.EndOuterExecute(result);
}
[Fx.Tag.Throws.Timeout("The operation timed out.")]
[Fx.Tag.Throws(typeof(OperationCanceledException), "The operation was canceled; the InstanceHandle is no longer valid.")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle), Conditional = "timeout != TimeSpan.Zero")]
public List WaitForEvents(InstanceHandle handle, TimeSpan timeout)
{
// This has to block on something... might as well be the async result, if the caller is already willing to waste a thread.
// (The TimeSpan.Zero case isn't fully optimized, but it is special-cased internally to not create timers / wait, it always
// completes synchronously or throws TimeoutException from BeginWaitForEvents.)
return EndWaitForEvents(BeginWaitForEvents(handle, timeout, null, null));
}
[Fx.Tag.InheritThrows(From = "WaitForEvents")]
public IAsyncResult BeginWaitForEvents(InstanceHandle handle, TimeSpan timeout, AsyncCallback callback, object state)
{
if (handle == null)
{
throw Fx.Exception.ArgumentNull("handle");
}
if (!object.ReferenceEquals(this, handle.Store))
{
throw Fx.Exception.Argument("handle", SRCore.ContextNotFromThisStore);
}
TimeoutHelper.ThrowIfNegativeArgument(timeout);
return InstanceHandle.BeginWaitForEvents(handle, timeout, callback, state);
}
[Fx.Tag.InheritThrows(From = "WaitForEvents")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle), Conditional = "!result.IsCompleted")]
public List EndWaitForEvents(IAsyncResult result)
{
return InstanceHandle.EndWaitForEvents(result);
}
protected void SignalEvent(InstancePersistenceEvent persistenceEvent, InstanceOwner owner)
{
if (persistenceEvent == null)
{
throw Fx.Exception.ArgumentNull("persistenceEvent");
}
if (owner == null)
{
throw Fx.Exception.ArgumentNull("owner");
}
InstanceNormalEvent normal;
InstanceHandle[] handlesToNotify = null;
lock (ThisLock)
{
WeakReference ownerReference;
if (!this.owners.TryGetValue(owner.InstanceOwnerId, out ownerReference) || !object.ReferenceEquals(ownerReference.Target, owner))
{
throw Fx.Exception.Argument("owner", SRCore.OwnerBelongsToWrongStore);
}
normal = GetOwnerEventHelper(persistenceEvent, owner);
if (!normal.IsSignaled)
{
normal.IsSignaled = true;
if (normal.BoundHandles.Count > 0)
{
handlesToNotify = normal.BoundHandles.ToArray();
}
}
}
if (handlesToNotify != null)
{
foreach (InstanceHandle handle in handlesToNotify)
{
handle.EventReady(normal);
}
}
}
protected void ResetEvent(InstancePersistenceEvent persistenceEvent, InstanceOwner owner)
{
if (persistenceEvent == null)
{
throw Fx.Exception.ArgumentNull("persistenceEvent");
}
if (owner == null)
{
throw Fx.Exception.ArgumentNull("owner");
}
InstanceNormalEvent normal;
lock (ThisLock)
{
WeakReference ownerReference;
if (!this.owners.TryGetValue(owner.InstanceOwnerId, out ownerReference) || !object.ReferenceEquals(ownerReference.Target, owner))
{
throw Fx.Exception.Argument("owner", SRCore.OwnerBelongsToWrongStore);
}
if (!owner.Events.TryGetValue(persistenceEvent.Name, out normal))
{
return;
}
if (normal.IsSignaled)
{
normal.IsSignaled = false;
if (normal.BoundHandles.Count == 0 && normal.PendingHandles.Count == 0)
{
owner.Events.Remove(persistenceEvent.Name);
}
}
}
}
protected virtual object OnNewInstanceHandle(InstanceHandle instanceHandle)
{
return null;
}
protected virtual void OnFreeInstanceHandle(InstanceHandle instanceHandle, object userContext)
{
}
[Fx.Tag.InheritThrows(From = "Execute")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle))]
protected internal virtual bool TryCommand(InstancePersistenceContext context, InstancePersistenceCommand command, TimeSpan timeout)
{
return EndTryCommand(BeginTryCommand(context, command, timeout, null, null));
}
[Fx.Tag.InheritThrows(From = "TryCommand")]
protected internal virtual IAsyncResult BeginTryCommand(InstancePersistenceContext context, InstancePersistenceCommand command, TimeSpan timeout, AsyncCallback callback, object state)
{
return new CompletedAsyncResult(false, callback, state);
}
[Fx.Tag.InheritThrows(From = "TryCommand")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle), Conditional = "!result.IsCompleted")]
protected internal virtual bool EndTryCommand(IAsyncResult result)
{
return CompletedAsyncResult.End(result);
}
protected InstanceOwner[] GetInstanceOwners()
{
lock (ThisLock)
{
return this.owners.Values.Select(weakReference => (InstanceOwner)weakReference.Target).Where(owner => owner != null).ToArray();
}
}
protected InstancePersistenceEvent[] GetEvents(InstanceOwner owner)
{
if (owner == null)
{
throw Fx.Exception.ArgumentNull("owner");
}
lock (ThisLock)
{
WeakReference ownerReference;
if (!this.owners.TryGetValue(owner.InstanceOwnerId, out ownerReference) || !object.ReferenceEquals(ownerReference.Target, owner))
{
throw Fx.Exception.Argument("owner", SRCore.OwnerBelongsToWrongStore);
}
return owner.Events.Values.ToArray();
}
}
internal InstanceOwner GetOrCreateOwner(Guid instanceOwnerId, Guid lockToken)
{
lock (ThisLock)
{
WeakReference ownerRef;
InstanceOwner owner;
if (this.owners.TryGetValue(instanceOwnerId, out ownerRef))
{
owner = (InstanceOwner)ownerRef.Target;
if (owner == null)
{
owner = new InstanceOwner(instanceOwnerId, lockToken);
ownerRef.Target = owner;
}
else if (owner.OwnerToken != lockToken)
{
throw Fx.Exception.AsError(new InvalidOperationException(SRCore.StoreReportedConflictingLockTokens));
}
}
else
{
owner = new InstanceOwner(instanceOwnerId, lockToken);
this.owners.Add(instanceOwnerId, new WeakReference(owner));
}
while (true)
{
if (this.ownerKeysToScan.Length == this.ownerKeysIndexToScan)
{
this.ownerKeysToScan = new Guid[this.owners.Count];
this.owners.Keys.CopyTo(this.ownerKeysToScan, 0);
this.ownerKeysIndexToScan = 0;
break;
}
Guid current = this.ownerKeysToScan[this.ownerKeysIndexToScan++];
if (this.owners.TryGetValue(current, out ownerRef))
{
if (ownerRef.Target == null)
{
this.owners.Remove(current);
}
else
{
break;
}
}
}
return owner;
}
}
internal void PendHandleToEvent(InstanceHandle handle, InstancePersistenceEvent persistenceEvent, InstanceOwner owner)
{
lock (ThisLock)
{
Fx.Assert(this.owners.ContainsKey(owner.InstanceOwnerId), "InstanceHandle called PendHandleToEvent on wrong InstanceStore!!");
Fx.Assert(object.ReferenceEquals(this.owners[owner.InstanceOwnerId].Target, owner), "How did multiple of the same owner become simultaneously active?");
InstanceNormalEvent normal = GetOwnerEventHelper(persistenceEvent, owner);
Fx.Assert(!normal.PendingHandles.Contains(handle), "Should not have already pended the handle.");
Fx.Assert(!normal.BoundHandles.Contains(handle), "Should not be able to pend an already-bound handle.");
normal.PendingHandles.Add(handle);
}
}
internal InstancePersistenceEvent AddHandleToEvent(InstanceHandle handle, InstancePersistenceEvent persistenceEvent, InstanceOwner owner)
{
lock (ThisLock)
{
Fx.Assert(this.owners.ContainsKey(owner.InstanceOwnerId), "InstanceHandle called AddHandleToEvent on wrong InstanceStore!!");
Fx.Assert(object.ReferenceEquals(this.owners[owner.InstanceOwnerId].Target, owner), "How did multiple instances of the same owner become simultaneously active?");
InstanceNormalEvent normal = GetOwnerEventHelper(persistenceEvent, owner);
Fx.Assert(normal.PendingHandles.Contains(handle), "Should have already pended the handle.");
Fx.Assert(!normal.BoundHandles.Contains(handle), "Should not be able to add a handle to an event twice.");
normal.BoundHandles.Add(handle);
normal.PendingHandles.Remove(handle);
return normal.IsSignaled ? normal : null;
}
}
internal List SelectSignaledEvents(IEnumerable eventNames, InstanceOwner owner)
{
List readyEvents = null;
lock (ThisLock)
{
Fx.Assert(this.owners.ContainsKey(owner.InstanceOwnerId), "InstanceHandle called SelectSignaledEvents on wrong InstanceStore!!");
Fx.Assert(object.ReferenceEquals(this.owners[owner.InstanceOwnerId].Target, owner), "How did multiple instances of the same owner become simultaneously active?");
// Entry must exist since it is still registered by the handle.
foreach (InstanceNormalEvent normal in eventNames.Select(name => owner.Events[name]))
{
if (normal.IsSignaled)
{
if (readyEvents == null)
{
readyEvents = new List(1);
}
readyEvents.Add(normal);
}
}
}
return readyEvents;
}
internal void RemoveHandleFromEvents(InstanceHandle handle, IEnumerable eventNames, InstanceOwner owner)
{
lock (ThisLock)
{
Fx.Assert(this.owners.ContainsKey(owner.InstanceOwnerId), "InstanceHandle called RemoveHandleFromEvents on wrong InstanceStore!!");
Fx.Assert(object.ReferenceEquals(this.owners[owner.InstanceOwnerId].Target, owner), "How did multiple instances of the same owner become simultaneously active in RemoveHandleFromEvents?");
// Entry must exist since it is still registered by the handle.
foreach (InstanceNormalEvent normal in eventNames.Select(name => owner.Events[name]))
{
Fx.Assert(normal.BoundHandles.Contains(handle) || normal.PendingHandles.Contains(handle), "Event should still have handle registration.");
normal.PendingHandles.Remove(handle);
normal.BoundHandles.Remove(handle);
if (!normal.IsSignaled && normal.BoundHandles.Count == 0 && normal.PendingHandles.Count == 0)
{
owner.Events.Remove(normal.Name);
}
}
}
}
// Must be called under ThisLock. Doesn't validate the InstanceOwner.
InstanceNormalEvent GetOwnerEventHelper(InstancePersistenceEvent persistenceEvent, InstanceOwner owner)
{
InstanceNormalEvent normal;
if (!owner.Events.TryGetValue(persistenceEvent.Name, out normal))
{
normal = new InstanceNormalEvent(persistenceEvent);
owner.Events.Add(persistenceEvent.Name, normal);
}
return normal;
}
internal void FreeInstanceHandle(InstanceHandle handle, object providerObject)
{
try
{
OnFreeInstanceHandle(handle, providerObject);
}
catch (Exception exception)
{
if (Fx.IsFatal(exception))
{
throw;
}
throw Fx.Exception.AsError(new CallbackException(SRCore.OnFreeInstanceHandleThrew, exception));
}
}
InstanceHandle PrepareInstanceHandle(InstanceHandle handle)
{
handle.ProviderObject = OnNewInstanceHandle(handle);
return handle;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//----------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//---------------------------------------------------------------
namespace System.Runtime.DurableInstancing
{
using System;
using System.Collections.Generic;
using System.Linq;
using System.Transactions;
using System.Xml.Linq;
// Persistence Lock Order:
// InstanceHandle.ThisLock then InstanceStore.ThisLock
// InstanceHandle.ThisLock then InstanceOwner.HandlesLock
[Fx.Tag.XamlVisible(false)]
public abstract class InstanceStore
{
readonly Dictionary owners = new Dictionary(1);
Guid[] ownerKeysToScan = new Guid[0];
int ownerKeysIndexToScan = 0;
protected InstanceStore()
{
}
object ThisLock
{
get
{
return this.owners;
}
}
public InstanceOwner DefaultInstanceOwner { get; set; }
public InstanceHandle CreateInstanceHandle()
{
return CreateInstanceHandle(DefaultInstanceOwner);
}
public InstanceHandle CreateInstanceHandle(InstanceOwner owner)
{
return PrepareInstanceHandle(new InstanceHandle(this, owner));
}
public InstanceHandle CreateInstanceHandle(Guid instanceId)
{
return CreateInstanceHandle(DefaultInstanceOwner, instanceId);
}
public InstanceHandle CreateInstanceHandle(InstanceOwner owner, Guid instanceId)
{
if (instanceId == Guid.Empty)
{
throw Fx.Exception.Argument("instanceId", SRCore.CannotCreateContextWithNullId);
}
return PrepareInstanceHandle(new InstanceHandle(this, owner, instanceId));
}
[Fx.Tag.Throws.Timeout("The operation timed out; the InstanceHandle is no longer valid.")]
[Fx.Tag.Throws(typeof(OperationCanceledException), "The operation was canceled; the InstanceHandle is no longer valid.")]
[Fx.Tag.Throws(typeof(InstancePersistenceException), "A command failed.")]
[Fx.Tag.Throws(typeof(TransactionException), "The transaction in use for the command failed.")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle))]
public InstanceView Execute(InstanceHandle handle, InstancePersistenceCommand command, TimeSpan timeout)
{
if (command == null)
{
throw Fx.Exception.ArgumentNull("command");
}
if (handle == null)
{
throw Fx.Exception.ArgumentNull("handle");
}
if (!object.ReferenceEquals(this, handle.Store))
{
throw Fx.Exception.Argument("handle", SRCore.ContextNotFromThisStore);
}
TimeoutHelper.ThrowIfNegativeArgument(timeout);
return InstancePersistenceContext.OuterExecute(handle, command, Transaction.Current, timeout);
}
[Fx.Tag.InheritThrows(From = "Execute")]
public IAsyncResult BeginExecute(InstanceHandle handle, InstancePersistenceCommand command, TimeSpan timeout, AsyncCallback callback, object state)
{
if (command == null)
{
throw Fx.Exception.ArgumentNull("command");
}
if (handle == null)
{
throw Fx.Exception.ArgumentNull("handle");
}
if (!object.ReferenceEquals(this, handle.Store))
{
throw Fx.Exception.Argument("handle", SRCore.ContextNotFromThisStore);
}
TimeoutHelper.ThrowIfNegativeArgument(timeout);
return InstancePersistenceContext.BeginOuterExecute(handle, command, Transaction.Current, timeout, callback, state);
}
[Fx.Tag.InheritThrows(From = "Execute")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle), Conditional = "!result.IsCompleted")]
public InstanceView EndExecute(IAsyncResult result)
{
return InstancePersistenceContext.EndOuterExecute(result);
}
[Fx.Tag.Throws.Timeout("The operation timed out.")]
[Fx.Tag.Throws(typeof(OperationCanceledException), "The operation was canceled; the InstanceHandle is no longer valid.")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle), Conditional = "timeout != TimeSpan.Zero")]
public List WaitForEvents(InstanceHandle handle, TimeSpan timeout)
{
// This has to block on something... might as well be the async result, if the caller is already willing to waste a thread.
// (The TimeSpan.Zero case isn't fully optimized, but it is special-cased internally to not create timers / wait, it always
// completes synchronously or throws TimeoutException from BeginWaitForEvents.)
return EndWaitForEvents(BeginWaitForEvents(handle, timeout, null, null));
}
[Fx.Tag.InheritThrows(From = "WaitForEvents")]
public IAsyncResult BeginWaitForEvents(InstanceHandle handle, TimeSpan timeout, AsyncCallback callback, object state)
{
if (handle == null)
{
throw Fx.Exception.ArgumentNull("handle");
}
if (!object.ReferenceEquals(this, handle.Store))
{
throw Fx.Exception.Argument("handle", SRCore.ContextNotFromThisStore);
}
TimeoutHelper.ThrowIfNegativeArgument(timeout);
return InstanceHandle.BeginWaitForEvents(handle, timeout, callback, state);
}
[Fx.Tag.InheritThrows(From = "WaitForEvents")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle), Conditional = "!result.IsCompleted")]
public List EndWaitForEvents(IAsyncResult result)
{
return InstanceHandle.EndWaitForEvents(result);
}
protected void SignalEvent(InstancePersistenceEvent persistenceEvent, InstanceOwner owner)
{
if (persistenceEvent == null)
{
throw Fx.Exception.ArgumentNull("persistenceEvent");
}
if (owner == null)
{
throw Fx.Exception.ArgumentNull("owner");
}
InstanceNormalEvent normal;
InstanceHandle[] handlesToNotify = null;
lock (ThisLock)
{
WeakReference ownerReference;
if (!this.owners.TryGetValue(owner.InstanceOwnerId, out ownerReference) || !object.ReferenceEquals(ownerReference.Target, owner))
{
throw Fx.Exception.Argument("owner", SRCore.OwnerBelongsToWrongStore);
}
normal = GetOwnerEventHelper(persistenceEvent, owner);
if (!normal.IsSignaled)
{
normal.IsSignaled = true;
if (normal.BoundHandles.Count > 0)
{
handlesToNotify = normal.BoundHandles.ToArray();
}
}
}
if (handlesToNotify != null)
{
foreach (InstanceHandle handle in handlesToNotify)
{
handle.EventReady(normal);
}
}
}
protected void ResetEvent(InstancePersistenceEvent persistenceEvent, InstanceOwner owner)
{
if (persistenceEvent == null)
{
throw Fx.Exception.ArgumentNull("persistenceEvent");
}
if (owner == null)
{
throw Fx.Exception.ArgumentNull("owner");
}
InstanceNormalEvent normal;
lock (ThisLock)
{
WeakReference ownerReference;
if (!this.owners.TryGetValue(owner.InstanceOwnerId, out ownerReference) || !object.ReferenceEquals(ownerReference.Target, owner))
{
throw Fx.Exception.Argument("owner", SRCore.OwnerBelongsToWrongStore);
}
if (!owner.Events.TryGetValue(persistenceEvent.Name, out normal))
{
return;
}
if (normal.IsSignaled)
{
normal.IsSignaled = false;
if (normal.BoundHandles.Count == 0 && normal.PendingHandles.Count == 0)
{
owner.Events.Remove(persistenceEvent.Name);
}
}
}
}
protected virtual object OnNewInstanceHandle(InstanceHandle instanceHandle)
{
return null;
}
protected virtual void OnFreeInstanceHandle(InstanceHandle instanceHandle, object userContext)
{
}
[Fx.Tag.InheritThrows(From = "Execute")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle))]
protected internal virtual bool TryCommand(InstancePersistenceContext context, InstancePersistenceCommand command, TimeSpan timeout)
{
return EndTryCommand(BeginTryCommand(context, command, timeout, null, null));
}
[Fx.Tag.InheritThrows(From = "TryCommand")]
protected internal virtual IAsyncResult BeginTryCommand(InstancePersistenceContext context, InstancePersistenceCommand command, TimeSpan timeout, AsyncCallback callback, object state)
{
return new CompletedAsyncResult(false, callback, state);
}
[Fx.Tag.InheritThrows(From = "TryCommand")]
[Fx.Tag.Blocking(CancelMethod = "Free", CancelDeclaringType = typeof(InstanceHandle), Conditional = "!result.IsCompleted")]
protected internal virtual bool EndTryCommand(IAsyncResult result)
{
return CompletedAsyncResult.End(result);
}
protected InstanceOwner[] GetInstanceOwners()
{
lock (ThisLock)
{
return this.owners.Values.Select(weakReference => (InstanceOwner)weakReference.Target).Where(owner => owner != null).ToArray();
}
}
protected InstancePersistenceEvent[] GetEvents(InstanceOwner owner)
{
if (owner == null)
{
throw Fx.Exception.ArgumentNull("owner");
}
lock (ThisLock)
{
WeakReference ownerReference;
if (!this.owners.TryGetValue(owner.InstanceOwnerId, out ownerReference) || !object.ReferenceEquals(ownerReference.Target, owner))
{
throw Fx.Exception.Argument("owner", SRCore.OwnerBelongsToWrongStore);
}
return owner.Events.Values.ToArray();
}
}
internal InstanceOwner GetOrCreateOwner(Guid instanceOwnerId, Guid lockToken)
{
lock (ThisLock)
{
WeakReference ownerRef;
InstanceOwner owner;
if (this.owners.TryGetValue(instanceOwnerId, out ownerRef))
{
owner = (InstanceOwner)ownerRef.Target;
if (owner == null)
{
owner = new InstanceOwner(instanceOwnerId, lockToken);
ownerRef.Target = owner;
}
else if (owner.OwnerToken != lockToken)
{
throw Fx.Exception.AsError(new InvalidOperationException(SRCore.StoreReportedConflictingLockTokens));
}
}
else
{
owner = new InstanceOwner(instanceOwnerId, lockToken);
this.owners.Add(instanceOwnerId, new WeakReference(owner));
}
while (true)
{
if (this.ownerKeysToScan.Length == this.ownerKeysIndexToScan)
{
this.ownerKeysToScan = new Guid[this.owners.Count];
this.owners.Keys.CopyTo(this.ownerKeysToScan, 0);
this.ownerKeysIndexToScan = 0;
break;
}
Guid current = this.ownerKeysToScan[this.ownerKeysIndexToScan++];
if (this.owners.TryGetValue(current, out ownerRef))
{
if (ownerRef.Target == null)
{
this.owners.Remove(current);
}
else
{
break;
}
}
}
return owner;
}
}
internal void PendHandleToEvent(InstanceHandle handle, InstancePersistenceEvent persistenceEvent, InstanceOwner owner)
{
lock (ThisLock)
{
Fx.Assert(this.owners.ContainsKey(owner.InstanceOwnerId), "InstanceHandle called PendHandleToEvent on wrong InstanceStore!!");
Fx.Assert(object.ReferenceEquals(this.owners[owner.InstanceOwnerId].Target, owner), "How did multiple of the same owner become simultaneously active?");
InstanceNormalEvent normal = GetOwnerEventHelper(persistenceEvent, owner);
Fx.Assert(!normal.PendingHandles.Contains(handle), "Should not have already pended the handle.");
Fx.Assert(!normal.BoundHandles.Contains(handle), "Should not be able to pend an already-bound handle.");
normal.PendingHandles.Add(handle);
}
}
internal InstancePersistenceEvent AddHandleToEvent(InstanceHandle handle, InstancePersistenceEvent persistenceEvent, InstanceOwner owner)
{
lock (ThisLock)
{
Fx.Assert(this.owners.ContainsKey(owner.InstanceOwnerId), "InstanceHandle called AddHandleToEvent on wrong InstanceStore!!");
Fx.Assert(object.ReferenceEquals(this.owners[owner.InstanceOwnerId].Target, owner), "How did multiple instances of the same owner become simultaneously active?");
InstanceNormalEvent normal = GetOwnerEventHelper(persistenceEvent, owner);
Fx.Assert(normal.PendingHandles.Contains(handle), "Should have already pended the handle.");
Fx.Assert(!normal.BoundHandles.Contains(handle), "Should not be able to add a handle to an event twice.");
normal.BoundHandles.Add(handle);
normal.PendingHandles.Remove(handle);
return normal.IsSignaled ? normal : null;
}
}
internal List SelectSignaledEvents(IEnumerable eventNames, InstanceOwner owner)
{
List readyEvents = null;
lock (ThisLock)
{
Fx.Assert(this.owners.ContainsKey(owner.InstanceOwnerId), "InstanceHandle called SelectSignaledEvents on wrong InstanceStore!!");
Fx.Assert(object.ReferenceEquals(this.owners[owner.InstanceOwnerId].Target, owner), "How did multiple instances of the same owner become simultaneously active?");
// Entry must exist since it is still registered by the handle.
foreach (InstanceNormalEvent normal in eventNames.Select(name => owner.Events[name]))
{
if (normal.IsSignaled)
{
if (readyEvents == null)
{
readyEvents = new List(1);
}
readyEvents.Add(normal);
}
}
}
return readyEvents;
}
internal void RemoveHandleFromEvents(InstanceHandle handle, IEnumerable eventNames, InstanceOwner owner)
{
lock (ThisLock)
{
Fx.Assert(this.owners.ContainsKey(owner.InstanceOwnerId), "InstanceHandle called RemoveHandleFromEvents on wrong InstanceStore!!");
Fx.Assert(object.ReferenceEquals(this.owners[owner.InstanceOwnerId].Target, owner), "How did multiple instances of the same owner become simultaneously active in RemoveHandleFromEvents?");
// Entry must exist since it is still registered by the handle.
foreach (InstanceNormalEvent normal in eventNames.Select(name => owner.Events[name]))
{
Fx.Assert(normal.BoundHandles.Contains(handle) || normal.PendingHandles.Contains(handle), "Event should still have handle registration.");
normal.PendingHandles.Remove(handle);
normal.BoundHandles.Remove(handle);
if (!normal.IsSignaled && normal.BoundHandles.Count == 0 && normal.PendingHandles.Count == 0)
{
owner.Events.Remove(normal.Name);
}
}
}
}
// Must be called under ThisLock. Doesn't validate the InstanceOwner.
InstanceNormalEvent GetOwnerEventHelper(InstancePersistenceEvent persistenceEvent, InstanceOwner owner)
{
InstanceNormalEvent normal;
if (!owner.Events.TryGetValue(persistenceEvent.Name, out normal))
{
normal = new InstanceNormalEvent(persistenceEvent);
owner.Events.Add(persistenceEvent.Name, normal);
}
return normal;
}
internal void FreeInstanceHandle(InstanceHandle handle, object providerObject)
{
try
{
OnFreeInstanceHandle(handle, providerObject);
}
catch (Exception exception)
{
if (Fx.IsFatal(exception))
{
throw;
}
throw Fx.Exception.AsError(new CallbackException(SRCore.OnFreeInstanceHandleThrew, exception));
}
}
InstanceHandle PrepareInstanceHandle(InstanceHandle handle)
{
handle.ProviderObject = OnNewInstanceHandle(handle);
return handle;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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- CodeGotoStatement.cs
- RecognizedPhrase.cs
- CommandID.cs
- CompiledQueryCacheKey.cs
- DiagnosticTraceSource.cs
- TableTextElementCollectionInternal.cs
- PageThemeCodeDomTreeGenerator.cs
- ProcessInputEventArgs.cs
- MessagePropertyVariants.cs
- IPHostEntry.cs
- GcSettings.cs
- HtmlTableRowCollection.cs
- LiteralLink.cs
- BaseAddressPrefixFilterElementCollection.cs
- ExpressionConverter.cs
- XamlPointCollectionSerializer.cs
- GeometryModel3D.cs
- SqlException.cs
- ParameterCollectionEditorForm.cs
- LocalizationParserHooks.cs
- ManagedIStream.cs
- ServiceOperationParameter.cs
- TrustLevel.cs
- XamlTreeBuilderBamlRecordWriter.cs
- DataBinding.cs
- ImageCodecInfoPrivate.cs
- ItemTypeToolStripMenuItem.cs
- CodeIdentifier.cs
- Border.cs
- InlineUIContainer.cs
- RequestCacheManager.cs
- SettingsAttributeDictionary.cs
- Guid.cs
- HandlerWithFactory.cs
- RNGCryptoServiceProvider.cs
- Material.cs
- ObjectFactoryCodeDomTreeGenerator.cs
- ExecutionContext.cs
- CaretElement.cs
- CompositeDataBoundControl.cs
- SoapInteropTypes.cs
- ElementInit.cs
- Base64Decoder.cs
- Stack.cs
- Viewport2DVisual3D.cs
- RelatedView.cs
- RuleProcessor.cs
- ReflectionPermission.cs
- OutputCacheProfile.cs
- XPathCompiler.cs
- TableParaClient.cs
- RangeBase.cs
- WebZone.cs
- PersonalizationEntry.cs
- TextTreeNode.cs
- FileLoadException.cs
- SqlCaseSimplifier.cs
- PolicyStatement.cs
- Configuration.cs
- SmiEventSink.cs
- CustomLineCap.cs
- KerberosTokenFactoryCredential.cs
- InvokeGenerator.cs
- WebPartManager.cs
- TimersDescriptionAttribute.cs
- WebException.cs
- CustomError.cs
- HeaderedContentControl.cs
- DBDataPermissionAttribute.cs
- ListItemParagraph.cs
- AmbientEnvironment.cs
- Cursor.cs
- BaseHashHelper.cs
- PriorityBindingExpression.cs
- OleDbWrapper.cs
- DecimalAnimationUsingKeyFrames.cs
- ListBindingHelper.cs
- ThicknessAnimationBase.cs
- SqlCaseSimplifier.cs
- LineSegment.cs
- BitStack.cs
- QueryContinueDragEvent.cs
- Codec.cs
- PackageDigitalSignatureManager.cs
- CodeCatchClause.cs
- RepeatButton.cs
- Polygon.cs
- TypeForwardedToAttribute.cs
- TaskExceptionHolder.cs
- Bitmap.cs
- Drawing.cs
- Table.cs
- webbrowsersite.cs
- SystemResourceHost.cs
- StaticTextPointer.cs
- AccessViolationException.cs
- ClrProviderManifest.cs
- RelationshipConstraintValidator.cs
- ArrayWithOffset.cs
- BitVector32.cs