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Changed the locking mechanism, because the existing one is causing deadlocks to occur.

prioritization
Diva Canto 2009-10-07 18:54:08 -07:00
parent ab3bfca546
commit c71b3e730d
1 changed files with 100 additions and 25 deletions
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125
OpenSim/Region/ClientStack/LindenUDP/LLUDPClientCollection.cs
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@ -41,6 +41,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
Dictionary<IPEndPoint, LLUDPClient> Dictionary2;
LLUDPClient[] Array;
ReaderWriterLockImpl rwLock = new ReaderWriterLockImpl();
object m_sync = new object();
public UDPClientCollection()
{
@ -58,9 +59,37 @@ namespace OpenSim.Region.ClientStack.LindenUDP
public void Add(UUID key1, IPEndPoint key2, LLUDPClient value)
{
rwLock.EnterWriteLock();
//rwLock.EnterWriteLock();
try
//try
//{
// if (Dictionary1.ContainsKey(key1))
// {
// if (!Dictionary2.ContainsKey(key2))
// throw new ArgumentException("key1 exists in the dictionary but not key2");
// }
// else if (Dictionary2.ContainsKey(key2))
// {
// if (!Dictionary1.ContainsKey(key1))
// throw new ArgumentException("key2 exists in the dictionary but not key1");
// }
// Dictionary1[key1] = value;
// Dictionary2[key2] = value;
// LLUDPClient[] oldArray = Array;
// int oldLength = oldArray.Length;
// LLUDPClient[] newArray = new LLUDPClient[oldLength + 1];
// for (int i = 0; i < oldLength; i++)
// newArray[i] = oldArray[i];
// newArray[oldLength] = value;
// Array = newArray;
//}
//finally { rwLock.ExitWriteLock(); }
lock (m_sync)
{
if (Dictionary1.ContainsKey(key1))
{
@ -86,14 +115,41 @@ namespace OpenSim.Region.ClientStack.LindenUDP
Array = newArray;
}
finally { rwLock.ExitWriteLock(); }
}
public bool Remove(UUID key1, IPEndPoint key2)
{
rwLock.EnterWriteLock();
//rwLock.EnterWriteLock();
try
//try
//{
// LLUDPClient value;
// if (Dictionary1.TryGetValue(key1, out value))
// {
// Dictionary1.Remove(key1);
// Dictionary2.Remove(key2);
// LLUDPClient[] oldArray = Array;
// int oldLength = oldArray.Length;
// LLUDPClient[] newArray = new LLUDPClient[oldLength - 1];
// int j = 0;
// for (int i = 0; i < oldLength; i++)
// {
// if (oldArray[i] != value)
// newArray[j++] = oldArray[i];
// }
// Array = newArray;
// return true;
// }
//}
//finally { rwLock.ExitWriteLock(); }
//return false;
lock (m_sync)
{
LLUDPClient value;
if (Dictionary1.TryGetValue(key1, out value))
@ -116,22 +172,30 @@ namespace OpenSim.Region.ClientStack.LindenUDP
return true;
}
}
finally { rwLock.ExitWriteLock(); }
return false;
}
public void Clear()
{
rwLock.EnterWriteLock();
//rwLock.EnterWriteLock();
try
//try
//{
// Dictionary1.Clear();
// Dictionary2.Clear();
// Array = new LLUDPClient[0];
//}
//finally { rwLock.ExitWriteLock(); }
lock (m_sync)
{
Dictionary1.Clear();
Dictionary2.Clear();
Array = new LLUDPClient[0];
}
finally { rwLock.ExitWriteLock(); }
}
public int Count
@ -151,35 +215,46 @@ namespace OpenSim.Region.ClientStack.LindenUDP
public bool TryGetValue(UUID key, out LLUDPClient value)
{
bool success;
bool doLock = !rwLock.IsUpgradeableReadLockHeld;
if (doLock) rwLock.EnterReadLock();
//bool success;
//bool doLock = !rwLock.IsUpgradeableReadLockHeld;
//if (doLock) rwLock.EnterReadLock();
try { success = Dictionary1.TryGetValue(key, out value); }
finally { if (doLock) rwLock.ExitReadLock(); }
//try { success = Dictionary1.TryGetValue(key, out value); }
//finally { if (doLock) rwLock.ExitReadLock(); }
//return success;
lock (m_sync)
return Dictionary1.TryGetValue(key, out value);
return success;
}
public bool TryGetValue(IPEndPoint key, out LLUDPClient value)
{
bool success;
bool doLock = !rwLock.IsUpgradeableReadLockHeld;
if (doLock) rwLock.EnterReadLock();
//bool success;
//bool doLock = !rwLock.IsUpgradeableReadLockHeld;
//if (doLock) rwLock.EnterReadLock();
try { success = Dictionary2.TryGetValue(key, out value); }
finally { if (doLock) rwLock.ExitReadLock(); }
//try { success = Dictionary2.TryGetValue(key, out value); }
//finally { if (doLock) rwLock.ExitReadLock(); }
return success;
//return success;
lock (m_sync)
return Dictionary2.TryGetValue(key, out value);
}
public void ForEach(Action<LLUDPClient> action)
{
bool doLock = !rwLock.IsUpgradeableReadLockHeld;
if (doLock) rwLock.EnterUpgradeableReadLock();
//bool doLock = !rwLock.IsUpgradeableReadLockHeld;
//if (doLock) rwLock.EnterUpgradeableReadLock();
//try { Parallel.ForEach<LLUDPClient>(Array, action); }
//finally { if (doLock) rwLock.ExitUpgradeableReadLock(); }
lock (m_sync)
Parallel.ForEach<LLUDPClient>(Array, action);
try { Parallel.ForEach<LLUDPClient>(Array, action); }
finally { if (doLock) rwLock.ExitUpgradeableReadLock(); }
}
}
}