/// <summary>
/// Fetches available existing chunk from cache or creates a new one.
/// Called by new sockets by incipient connections
/// </summary>
internal MemChunk MakeOrReuseChunk()
{
var chunks = m_Chunks;
MemChunk chunk = null;
if (chunks != null)
{
var now = App.TimeSource.UTCNow;
lock (m_Chunks)//since this method is called on new socket creation, it is OK to lock for short time
{
for (var i = 0; i < m_Chunks.Count; i++)
{
chunk = m_Chunks[i];
if (chunk.Acquired)
{
continue; //is already taken by some socket
}
if ((now - chunk._LastReleaseUtc).TotalSeconds >= CHUNK_DORMANT_PERIOD_SEC) //chunk must be in the pool for the specified minimum 'rest' time
{ // this is needed so all pending async socket operations timeout
chunk.Acquired = true;
return(chunk);
}
}
}
}
//otherwise create new chunk, no need to add it to pool here. The release will do it later (if ever called)
chunk = new MemChunk(Consts.DEFAULT_SERIALIZER_STREAM_CAPACITY);
return(chunk);
}
private int serialize(MemChunk chunk, WireFrame frame, Msg msg)
{
chunk.Position = sizeof(int);
frame.Serialize(chunk);
Binding.Serializer.Serialize(chunk, msg);
var size = (int)chunk.Position; //includes 4 byte len prefix
var buff = chunk.GetBuffer(); //no stream expansion beyond this point
buff.WriteBEInt32(0, size);
return(size);
}
internal void ReleaseChunk(MemChunk chunk)
{
if (chunk == null || !Running)
{
return;
}
chunk.Acquired = false;
chunk._LastReleaseUtc = App.TimeSource.UTCNow;
WriteLog(LogSrc.Any,
Log.MessageType.TraceGlue,
"Chunk released back to pool; Used {0} capacity {1} ".Args(chunk.stat_MaxUsedPosition, chunk.stat_MaxLength));
var chunks = m_Chunks;
if (chunks == null)
{
return;
}
lock (chunks)
{
if (m_Chunks.Count < m_MaxChunkPoolCount)
{
for (var i = 0; i < m_Chunks.Count; i++)
{
if (object.ReferenceEquals(m_Chunks[i], chunk))
{
return; //already in pool
}
}
chunks.Add(chunk);
}
}
}
/// <summary>
/// Creates WireMsg around pre-filled memory chunk that includes msg size - first 4 bytes
/// </summary>
public WireMsg(MemChunk data) : this()
{
Data = data;
}
