private static void UvAllocCb(IntPtr handle, int suggested_size, out Libuv.uv_buf_t buf)
{
var stream = FromIntPtr <UvStreamHandle>(handle);
try
{
buf = stream._allocCallback(stream, suggested_size, stream._readState);
}
catch (Exception ex)
{
stream._log.LogError(0, ex, "UvAllocCb");
buf = stream.Libuv.buf_init(IntPtr.Zero, 0);
throw;
}
}
public unsafe void Write2(
UvStreamHandle handle,
ArraySegment <ArraySegment <byte> > bufs,
UvStreamHandle sendHandle,
Action <UvWriteReq, int, Exception, object> callback,
object state)
{
try
{
// add GCHandle to keeps this SafeHandle alive while request processing
_pins.Add(GCHandle.Alloc(this, GCHandleType.Normal));
var pBuffers = (Libuv.uv_buf_t *)_bufs;
var nBuffers = bufs.Count;
if (nBuffers > BUFFER_COUNT)
{
// create and pin buffer array when it's larger than the pre-allocated one
var bufArray = new Libuv.uv_buf_t[nBuffers];
var gcHandle = GCHandle.Alloc(bufArray, GCHandleType.Pinned);
_pins.Add(gcHandle);
pBuffers = (Libuv.uv_buf_t *)gcHandle.AddrOfPinnedObject();
}
for (var index = 0; index < nBuffers; index++)
{
// create and pin each segment being written
var buf = bufs.Array[bufs.Offset + index];
var gcHandle = GCHandle.Alloc(buf.Array, GCHandleType.Pinned);
_pins.Add(gcHandle);
pBuffers[index] = Libuv.buf_init(
gcHandle.AddrOfPinnedObject() + buf.Offset,
buf.Count);
}
_callback = callback;
_state = state;
_uv.write2(this, handle, pBuffers, nBuffers, sendHandle, _uv_write_cb);
}
catch
{
_callback = null;
_state = null;
Unpin(this);
throw;
}
}
public int TryWrite(Libuv.uv_buf_t buf)
{
return(_uv.try_write(this, new[] { buf }, 1));
}