// Cycles through the table periodically and cleans up expired entries.
//
private static void CleanupIdentities(Object state)
{
// FUTURE:: come up with a better way to do this
BCLDebug.Assert(
Thread.GetDomain().RemotingData.IDTableLock.IsWriterLockHeld,
"ID Table being cleaned up without taking a lock!");
IDictionaryEnumerator e = URITable.GetEnumerator();
ArrayList removeList = new ArrayList();
while (e.MoveNext())
{
Object o = e.Value;
WeakReference wr = o as WeakReference;
if ((null != wr) && (null == wr.Target))
{
removeList.Add(e.Key);
}
}
foreach (String key in removeList)
{
URITable.Remove(key);
}
}
[System.Security.SecurityCritical] // auto-generated
internal static void RemoveIdentity(String uri, bool bResetURI)
{
Contract.Assert(uri != null, "Null URI");
BCLDebug.Trace("REMOTE",
"IdentityHolder.WeakenIdentity ", uri, " for context ", Thread.CurrentContext);
Identity id;
String uriKey = MakeURIKey(uri);
// We need to guarantee that finally is not interrupted so that the lock is released.
// TableLock has a long path without reliability contract. To avoid adding contract on
// the path, we will use ReaderWriterLock directly.
ReaderWriterLock rwlock = TableLock;
bool takeAndRelease = !rwlock.IsWriterLockHeld;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
if (takeAndRelease)
{
rwlock.AcquireWriterLock(INFINITE);
}
Object oRef = URITable[uriKey];
WeakReference wr = oRef as WeakReference;
if (null != wr)
{
id = (Identity)wr.Target;
wr.Target = null;
}
else
{
id = (Identity)oRef;
if (id != null)
{
((ServerIdentity)id).ResetHandle();
}
}
if (id != null)
{
URITable.Remove(uriKey);
// Mark the ID as not present in the ID Table
// This will clear its URI & objRef fields
id.ResetInIDTable(bResetURI);
}
}
finally
{
if (takeAndRelease && rwlock.IsWriterLockHeld)
{
rwlock.ReleaseWriterLock();
}
}
} // RemoveIdentity
private static void CleanupIdentities(object state)
{
IDictionaryEnumerator enumerator = URITable.GetEnumerator();
ArrayList list = new ArrayList();
while (enumerator.MoveNext())
{
WeakReference reference = enumerator.Value as WeakReference;
if ((reference != null) && (reference.Target == null))
{
list.Add(enumerator.Key);
}
}
foreach (string str in list)
{
URITable.Remove(str);
}
}
internal static void RemoveIdentity(string uri, bool bResetURI)
{
string key = MakeURIKey(uri);
ReaderWriterLock tableLock = TableLock;
bool flag = !tableLock.IsWriterLockHeld;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
Identity target;
if (flag)
{
tableLock.AcquireWriterLock(0x7fffffff);
}
object obj2 = URITable[key];
WeakReference reference = obj2 as WeakReference;
if (reference != null)
{
target = (Identity)reference.Target;
reference.Target = null;
}
else
{
target = (Identity)obj2;
if (target != null)
{
((ServerIdentity)target).ResetHandle();
}
}
if (target != null)
{
URITable.Remove(key);
target.ResetInIDTable(bResetURI);
}
}
finally
{
if (flag && tableLock.IsWriterLockHeld)
{
tableLock.ReleaseWriterLock();
}
}
}
internal static void RemoveIdentity(String uri, bool bResetURI)
{
BCLDebug.Assert(uri != null, "Null URI");
BCLDebug.Trace("REMOTE",
"IdentityHolder.WeakenIdentity ", uri, " for context ", Thread.CurrentContext);
Identity id;
String uriKey = MakeURIKey(uri);
try
{
TableLock.AcquireWriterLock(INFINITE);
Object oRef = URITable[uriKey];
WeakReference wr = oRef as WeakReference;
if (null != wr)
{
id = (Identity)wr.Target;
wr.Target = null;
}
else
{
id = (Identity)oRef;
}
if (id != null)
{
URITable.Remove(uriKey);
// Mark the ID as not present in the ID Table
// This will clear its URI & objRef fields
id.ResetInIDTable(bResetURI);
}
}
finally
{
TableLock.ReleaseWriterLock();
}
} // RemoveIdentity
