public int TryWrite(LibuvFunctions.uv_buf_t buf)
{
return(_uv.try_write(this, new[] { buf }, 1));
}
private unsafe void Write(
UvStreamHandle handle,
ReadOnlySequence <byte> buffer,
Action <UvWriteReq, int, UvException, object> callback,
object state)
{
try
{
var nBuffers = 0;
if (buffer.IsSingleSegment)
{
nBuffers = 1;
}
else
{
foreach (var _ in buffer)
{
nBuffers++;
}
}
var pBuffers = (LibuvFunctions.uv_buf_t *)_bufs;
if (nBuffers > BUFFER_COUNT)
{
// create and pin buffer array when it's larger than the pre-allocated one
var bufArray = new LibuvFunctions.uv_buf_t[nBuffers];
var gcHandle = GCHandle.Alloc(bufArray, GCHandleType.Pinned);
_pins.Add(gcHandle);
pBuffers = (LibuvFunctions.uv_buf_t *)gcHandle.AddrOfPinnedObject();
}
if (nBuffers == 1)
{
var memory = buffer.First;
var memoryHandle = memory.Pin();
_handles.Add(memoryHandle);
// Fast path for single buffer
pBuffers[0] = Libuv.buf_init(
(IntPtr)memoryHandle.Pointer,
memory.Length);
}
else
{
var index = 0;
foreach (var memory in buffer)
{
// This won't actually pin the buffer since we're already using pinned memory
var memoryHandle = memory.Pin();
_handles.Add(memoryHandle);
// create and pin each segment being written
pBuffers[index] = Libuv.buf_init(
(IntPtr)memoryHandle.Pointer,
memory.Length);
index++;
}
}
_callback = callback;
_state = state;
_uv.write(this, handle, pBuffers, nBuffers, _uv_write_cb);
}
catch
{
_callback = null;
_state = null;
UnpinGcHandles();
throw;
}
}