unsafe protected void CreateMemory(Libuv uv, int threadId, int size)
{
_uv = uv;
ThreadId = threadId;
handle = Marshal.AllocCoTaskMem(size);
*(IntPtr *)handle = GCHandle.ToIntPtr(GCHandle.Alloc(this, GCHandleType.Weak));
}
public void Init(Libuv uv)
{
CreateMemory(
uv,
Thread.CurrentThread.ManagedThreadId,
uv.loop_size());
_uv.loop_init(this);
}
unsafe protected void CreateHandle(
Libuv uv,
int threadId,
int size,
Action <Action <IntPtr>, IntPtr> queueCloseHandle)
{
_queueCloseHandle = queueCloseHandle;
CreateMemory(uv, threadId, size);
}
public unsafe void Write(
UvStreamHandle handle,
MemoryPoolIterator start,
MemoryPoolIterator end,
int nBuffers,
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;
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();
}
var block = start.Block;
for (var index = 0; index < nBuffers; index++)
{
var blockStart = block == start.Block ? start.Index : block.Data.Offset;
var blockEnd = block == end.Block ? end.Index : block.Data.Offset + block.Data.Count;
// create and pin each segment being written
pBuffers[index] = Libuv.buf_init(
block.DataArrayPtr + blockStart,
blockEnd - blockStart);
block = block.Next;
}
_callback = callback;
_state = state;
_uv.write(this, handle, pBuffers, nBuffers, _uv_write_cb);
}
catch
{
_callback = null;
_state = null;
Unpin(this);
var block = start.Block;
for (var index = 0; index < nBuffers; index++)
{
block = block.Next;
}
throw;
}
}
private unsafe void WriteArraySegmentInternal(
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;
if (sendHandle == null)
{
_uv.write(this, handle, pBuffers, nBuffers, _uv_write_cb);
}
else
{
_uv.write2(this, handle, pBuffers, nBuffers, sendHandle, _uv_write_cb);
}
}
catch
{
_callback = null;
_state = null;
Unpin(this);
throw;
}
}
public void Connect(
UvPipeHandle pipe,
string name,
Action <UvConnectRequest, int, Exception, object> callback,
object state)
{
_callback = callback;
_state = state;
Pin();
Libuv.pipe_connect(this, pipe, name, _uv_connect_cb);
}