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C# support for directly reading and writting to memory other than byte[]. For example, ByteBuffer can be initialized with a custom allocator which uses shared memory / memory mapped files. (#4886)

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Public access to the backing buffer uses Span<T> instead of ArraySegment<T>.

Writing to the buffer now supports Span<T> in addition to T[].

To maintain backwards compatibility ENABLE_SPAN_T must be defined.
This commit is contained in:
Christopher Cifra
2018-08-23 12:05:31 -05:00
committed by Wouter van Oortmerssen
parent e1f48ad35a
commit d0321df8cf
10 changed files with 545 additions and 127 deletions
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18
net/FlatBuffers/Table.cs
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@@ -78,6 +78,23 @@ namespace FlatBuffers
return offset + bb.GetInt(offset) + sizeof(int); // data starts after the length
}
#if ENABLE_SPAN_T
// Get the data of a vector whoses offset is stored at "offset" in this object as an
// Spant&lt;byte&gt;. If the vector is not present in the ByteBuffer,
// then an empty span will be returned.
public Span<byte> __vector_as_span(int offset)
{
var o = this.__offset(offset);
if (0 == o)
{
return new Span<byte>();
}
var pos = this.__vector(o);
var len = this.__vector_len(o);
return bb.ToSpan(pos, len);
}
#else
// Get the data of a vector whoses offset is stored at "offset" in this object as an
// ArraySegment&lt;byte&gt;. If the vector is not present in the ByteBuffer,
// then a null value will be returned.
@@ -93,6 +110,7 @@ namespace FlatBuffers
var len = this.__vector_len(o);
return bb.ToArraySegment(pos, len);
}
#endif
// Get the data of a vector whoses offset is stored at "offset" in this object as an
// T[]. If the vector is not present in the ByteBuffer, then a null value will be