Object synchronization method was called from an unsynchronized block of code

Question

_{Friday, September 5, 2008 7:27 AM}

I am working in C# desktop application 

and I have two function 

function 1()
{
lock()
{
.....
fun2();
}
}

fun2()
{
 lock()
}

but getting error below
Object synchronization method was called from an unsynchronized block of code.

It's Me

All replies (3)

_{Friday, September 5, 2008 7:36 AM}

That isn't your actual code - you would see errors about "Invalid expression term ')'" and ") expected" (plus "function 1" is not a valid method name) - you must lock something. Further, that error occurs if (for example) you try and Exit/Pulse/etc a lock that you don't own; the "lock" keyword by itself won't do this.

So what is your actual code?

[edit: locks are re-entrant, so there is no problem using lock on the same object in both "function 1" and "fun2", even if "function1" calls "fun2"]

Marc

_{Friday, September 5, 2008 7:40 AM}

try

{

lock (_lock)

{

Socket client = (Socket)iar.AsyncState;

int recv = client.EndReceive(iar);

if (recv == 0)

{

conStatus.Text = "Client" + client.RemoteEndPoint.ToString() + " has disconnected.";

server.BeginAccept(new AsyncCallback(AcceptConn), server);

return;

}

else

{

DataRecive.Append(Encoding.ASCII.GetString(data, 0, recv));

string receivedData = Convert.ToString(DataRecive);

int IvalidateMessageNo = countCharacter(receivedData, "&"); // want to know how many time & occur in the retrive string .,,,,,,, working on socket programming

if (receivedData.EndsWith("listening skills"))

{

results.Items.Add(receivedData + client.RemoteEndPoint);

client.BeginReceive(data, 0, size, SocketFlags.None,

new AsyncCallback(ReceiveData), client);

}

client.BeginReceive(data, 0, size, SocketFlags.None,

new AsyncCallback(ReceiveData), client);

}

}

private static int countCharacter(string message, string Strsplitted)

{

lock (_lock)

{

string NewMessage = message;

NewMessage = NewMessage.Replace(Strsplitted, "");

return message.Length - NewMessage.Length;

}

}

It's Me

_{Friday, September 5, 2008 7:48 AM | 1 vote}

First - why do you need a lock in countCharacter? It is side-effect free...

Second - where does the exception happen? On the blue lines?

Third - how  is _lock defined? (it sometimes matters...)

Marc