public unsafe void Write(
UvStreamHandle handle,
ref ReadableBuffer buffer,
Action <UvWriteReq, int, Exception, object> callback,
object state)
{
try
{
int nBuffers = 0;
if (buffer.IsSingleSpan)
{
nBuffers = 1;
}
else
{
foreach (var span in buffer)
{
nBuffers++;
}
}
// add GCHandle to keeps this SafeHandle alive while request processing
_pins.Add(GCHandle.Alloc(this, GCHandleType.Normal));
var pBuffers = (Uv.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 Uv.uv_buf_t[nBuffers];
var gcHandle = GCHandle.Alloc(bufArray, GCHandleType.Pinned);
_pins.Add(gcHandle);
pBuffers = (Uv.uv_buf_t *)gcHandle.AddrOfPinnedObject();
}
if (nBuffers == 1)
{
var span = buffer.FirstSpan;
pBuffers[0] = Libuv.buf_init((IntPtr)span.UnsafePointer, span.Length);
}
else
{
int i = 0;
foreach (var span in buffer)
{
pBuffers[i++] = Libuv.buf_init((IntPtr)span.UnsafePointer, span.Length);
}
}
_callback = callback;
_state = state;
_uv.write(this, handle, pBuffers, nBuffers, _uv_write_cb);
}
catch
{
_callback = null;
_state = null;
Unpin(this);
throw;
}
}
private static void UvAllocCb(IntPtr handle, int suggested_size, out Uv.uv_buf_t buf)
{
var stream = FromIntPtr <UvStreamHandle>(handle);
try
{
buf = stream._allocCallback(stream, suggested_size, stream._readState);
}
catch
{
buf = stream.Libuv.buf_init(IntPtr.Zero, 0);
throw;
}
}
public unsafe void Write(
UvStreamHandle handle,
ReadableBuffer buffer,
Action <UvWriteReq, int, object> callback,
object state)
{
try
{
// Preserve the buffer for the async call
_buffer = buffer.Preserve();
buffer = _buffer.Buffer;
int nBuffers = 0;
if (buffer.IsSingleSpan)
{
nBuffers = 1;
}
else
{
foreach (var span in buffer)
{
nBuffers++;
}
}
// add GCHandle to keeps this SafeHandle alive while request processing
_pins.Add(GCHandle.Alloc(this, GCHandleType.Normal));
var pBuffers = (Uv.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 Uv.uv_buf_t[nBuffers];
var gcHandle = GCHandle.Alloc(bufArray, GCHandleType.Pinned);
_pins.Add(gcHandle);
pBuffers = (Uv.uv_buf_t *)gcHandle.AddrOfPinnedObject();
}
if (nBuffers == 1)
{
var memory = buffer.First;
void *pointer;
if (memory.TryGetPointer(out pointer))
{
pBuffers[0] = Libuv.buf_init((IntPtr)pointer, memory.Length);
}
else
{
throw new InvalidOperationException("Memory needs to be pinned");
}
}
else
{
int i = 0;
void *pointer;
foreach (var memory in buffer)
{
if (memory.TryGetPointer(out pointer))
{
pBuffers[i++] = Libuv.buf_init((IntPtr)pointer, memory.Length);
}
else
{
throw new InvalidOperationException("Memory needs to be pinned");
}
}
}
_callback = callback;
_state = state;
_uv.write(this, handle, pBuffers, nBuffers, _uv_write_cb);
}
catch
{
_callback = null;
_state = null;
_buffer.Dispose();
Unpin(this);
throw;
}
}
private static void UvReadCb(IntPtr handle, int status, ref Uv.uv_buf_t buf)
{
var stream = FromIntPtr <UvStreamHandle>(handle);
stream._readCallback(stream, status, stream._readState);
}
public int TryWrite(Uv.uv_buf_t buf)
{
return(_uv.try_write(this, new[] { buf }, 1));
}