public bool Timeout(MalockTaskInfo info)
{
MalockMessage message = this.NewMessage(info.Key, info.Identity, MalockMessage.COMMON_COMMAND_TIMEOUT, info.Sequence, info.Timeout);
MalockMessage.TrySendMessage(info.Socket, message);
return(true);
}
public void AckPipelineExit(MalockTaskInfo info) // anti-deadlock
{
string key = this.GetAckPipelineKey(info);
lock (this.ackPipelineCounter)
{
bool entering = this.malockTable.IsEnter(info.Key, info.Identity);
int count = 0;
if (!this.ackPipelineCounter.TryGetValue(key, out count))
{
if (entering)
{
this.ackPipelineCounter.Add(key, ++count);
}
}
else if (!entering)
{
count = 0; // reset counter
this.ackPipelineCounter[key] = 0;
}
else
{
this.ackPipelineCounter[key] = ++count;
}
if (count > Malock.AckPipelineDeadlockCount)
{
this.ackPipelineCounter[key] = 0;
this.Exit(info);
}
}
}
public unsafe bool GetAllInfo(MalockTaskInfo info)
{
using (MemoryStream stream = new MemoryStream())
{
BinaryWriter bw = new BinaryWriter(stream);
bw.Write(0);
int count = 0;
lock (this.malockTable)
{
foreach (var locker in this.malockTable.GetAllLocker())
{
lock (locker)
{
HandleInfo handleInfo = new HandleInfo(
locker.Key, locker.Identity, locker.Available);
handleInfo.Serialize(stream);
}
count++;
}
}
byte[] buffer = stream.GetBuffer();
fixed(byte *pinned = buffer)
{
*(int *)pinned = count;
}
MalockMessage message = this.NewMessage(info.Key, info.Identity, MalockNodeMessage.CLIENT_COMMAND_GETALLINFO, info.Sequence, -1);
return(MalockMessage.TrySendMessage(info.Socket, message, buffer, 0, Convert.ToInt32(stream.Position)));
}
}
private void Handle(MalockTaskType type, MalockTaskTable tables)
{
foreach (var kv in tables)
{
LinkedList <MalockTaskInfo> tasks = kv.Value;
MalockTaskInfo info = null;
LinkedListNode <MalockTaskInfo> node = null;
lock (tasks)
{
node = tasks.First;
if (node == null)
{
continue;
}
info = node.Value;
}
bool success = false;
Stopwatch sw = info.Stopwatch;
if (sw != null && info.Timeout != -1 && sw.ElapsedMilliseconds > info.Timeout)
{
success = this.engine.Timeout(info);
}
else
{
switch (type)
{
case MalockTaskType.kEnter:
success = this.engine.Enter(info);
break;
case MalockTaskType.kExit:
success = this.engine.Exit(info);
break;
case MalockTaskType.kAbort:
success = this.engine.Abort(info);
break;
case MalockTaskType.kGetAllInfo:
success = this.engine.GetAllInfo(info);
break;
}
}
if (success)
{
lock (tasks)
{
if (node.List != null)
{
tasks.Remove(node);
}
}
}
}
}
public void AckPipelineEnter(MalockTaskInfo info)
{
string key = this.GetAckPipelineKey(info);
lock (this.ackPipelineCounter)
{
int count = 0;
if (this.ackPipelineCounter.TryGetValue(key, out count))
{
this.ackPipelineCounter[key] = 0;
}
}
}
public bool Abort(MalockTaskInfo info)
{
if (string.IsNullOrEmpty(info.Identity))
{
return(false);
}
this.malockTaskPoll.Remove(info.Identity);
do
{
string[] keys;
this.malockTable.FreeKeyCollection(info.Identity, out keys);
this.AckPipelineEnter(info.Identity, keys);
} while (false);
MalockMessage message = this.NewMessage(info.Key, info.Identity, MalockNodeMessage.SERVER_COMMAND_SYN_FREE, info.Sequence, -1);
MalockMessage.TrySendMessage(this.malockStandbyClient, message);
return(true);
}
public bool Exit(MalockTaskInfo info)
{
byte errno = MalockNodeMessage.CLIENT_COMMAND_LOCK_EXIT;
if (!this.malockTable.Exit(info.Key, info.Identity))
{
errno = MalockMessage.COMMON_COMMAND_ERROR;
}
using (Stream message = this.NewMessage(info.Key, info.Identity, errno, info.Sequence, info.Timeout).Serialize())
{
if (info.Socket != null)
{
MalockMessage.TrySendMessage(info.Socket, message);
}
MalockMessage.TrySendMessage(malockStandbyClient, message);
}
this.AckPipelineEnter(info);
return(true);
}
public void Add(MalockTaskInfo info)
{
LinkedList <MalockTaskInfo> tasks;
string identity = info.Identity;
lock (this.tables)
{
MalockTaskTable tables = this.GetTable(info.Type);
if (!tables.TryGetValue(identity, out tasks))
{
tasks = new LinkedList <MalockTaskInfo>();
tables.TryAdd(identity, tasks);
}
lock (tasks)
{
tasks.AddLast(info);
}
}
}
public bool Enter(MalockTaskInfo info)
{
if (!this.malockTable.Enter(info.Key, info.Identity))
{
return(false);
}
using (Stream message = this.NewMessage(info.Key, info.Identity, MalockNodeMessage.CLIENT_COMMAND_LOCK_ENTER,
info.Sequence, info.Timeout).Serialize())
{
if (MalockMessage.TrySendMessage(info.Socket, message))
{
MalockMessage.TrySendMessage(this.malockStandbyClient, message);
return(true);
}
else
{
this.malockTable.Exit(info.Key, info.Identity);
this.AckPipelineEnter(info);
}
}
return(false);
}
private string GetAckPipelineKey(MalockTaskInfo info)
{
return(this.GetAckPipelineKey(info.Identity, info.Key));
}
private void ProcessClient(MalockSocket socket, MalockNodeMessage message)
{
if (message.Command == MalockNodeMessage.CLIENT_COMMAND_LOCK_ENTER ||
message.Command == MalockNodeMessage.CLIENT_COMMAND_LOCK_EXIT ||
message.Command == MalockNodeMessage.CLIENT_COMMAND_GETALLINFO ||
message.Command == MalockNodeMessage.CLIENT_COMMAND_LOCK_ACKPIPELINEEXIT ||
message.Command == MalockNodeMessage.CLIENT_COMMAND_LOCK_ACKPIPELINEENTER)
{
MalockTaskInfo info = new MalockTaskInfo();
switch (message.Command)
{
case MalockNodeMessage.CLIENT_COMMAND_LOCK_ENTER:
info.Type = MalockTaskType.kEnter;
break;
case MalockNodeMessage.CLIENT_COMMAND_LOCK_EXIT:
info.Type = MalockTaskType.kExit;
break;
case MalockNodeMessage.CLIENT_COMMAND_GETALLINFO:
info.Type = MalockTaskType.kGetAllInfo;
break;
case MalockNodeMessage.CLIENT_COMMAND_LOCK_ACKPIPELINEEXIT:
info.Type = MalockTaskType.kAckPipelineExit;
break;
case MalockNodeMessage.CLIENT_COMMAND_LOCK_ACKPIPELINEENTER:
info.Type = MalockTaskType.kAckPipelineEnter;
break;
}
info.Sequence = message.Sequence;
info.Socket = socket;
info.Key = message.Key;
info.Identity = socket.Identity;
info.Timeout = message.Timeout;
do
{
Stopwatch sw = new Stopwatch();
info.Stopwatch = sw;
sw.Start();
} while (false);
if (message.Command == MalockNodeMessage.CLIENT_COMMAND_LOCK_EXIT)
{
this.malockEngine.Exit(info);
}
else if (message.Command == MalockNodeMessage.CLIENT_COMMAND_LOCK_ENTER)
{
if (this.malockEngine.Enter(info))
{
this.malockEngine.AckPipelineEnter(info);
}
else
{
this.malockEngine.GetPoll().Add(info);
}
}
else if (message.Command == MalockNodeMessage.CLIENT_COMMAND_LOCK_ACKPIPELINEEXIT)
{
this.malockEngine.AckPipelineExit(info); // anti-deadlock
}
else if (message.Command == MalockNodeMessage.CLIENT_COMMAND_LOCK_ACKPIPELINEENTER)
{
this.malockEngine.AckPipelineEnter(info);
}
else if (message.Command == MalockNodeMessage.CLIENT_COMMAND_GETALLINFO)
{
this.malockEngine.GetAllInfo(info);
}
}
}
