//
// Allocates a new {SocketAsyncEngine, handle} pair.
//
private static void AllocateToken(SocketAsyncContext context, out SocketAsyncEngine engine, out IntPtr handle)
{
lock (s_lock)
{
if (s_currentEngine == null)
{
s_currentEngine = new SocketAsyncEngine();
}
engine = s_currentEngine;
handle = s_currentEngine.AllocateHandle(context);
}
}
private IntPtr AllocateHandle(SocketAsyncContext context)
{
Debug.Assert(Monitor.IsEntered(s_lock), "Expected s_lock to be held");
Debug.Assert(!IsFull, "Expected !IsFull");
IntPtr handle = _nextHandle;
_handleToContextMap.Add(handle, context);
_nextHandle = IntPtr.Add(_nextHandle, 1);
_outstandingHandles = IntPtr.Add(_outstandingHandles, 1);
if (IsFull)
{
// We'll need to create a new event port for the next handle.
s_currentEngine = null;
}
Debug.Assert(handle != ShutdownHandle, $"Expected handle != ShutdownHandle: {handle}");
return(handle);
}
