public async Task WritesToArrayPoolByDefault()
{
var pipe = new Pipe();
pipe.Writer.WriteEmpty(10);
await pipe.Writer.FlushAsync();
pipe.Writer.Complete();
ReadResult result = await pipe.Reader.ReadAsync();
Assert.Equal(10, result.Buffer.Length);
SequenceMarshal.TryGetReadOnlySequenceSegment(
result.Buffer,
out ReadOnlySequenceSegment <byte> start,
out int startIndex,
out ReadOnlySequenceSegment <byte> end,
out int endIndex);
var startSegment = (BufferSegment)start;
var endSegment = (BufferSegment)end;
Assert.Same(startSegment, endSegment);
Assert.IsType <byte[]>(startSegment.MemoryOwner);
pipe.Reader.AdvanceTo(result.Buffer.End);
pipe.Reader.Complete();
}
public void Ctor_Memory_String()
{
var text = "Hello";
var memory = text.AsMemory();
var buffer = new ReadOnlySequence <char>(memory.Slice(2, 3));
Assert.True(SequenceMarshal.TryGetReadOnlyMemory(buffer, out ReadOnlyMemory <char> newMemory));
Assert.Equal(text.Substring(2, 3).ToCharArray(), newMemory.ToArray());
Assert.False(SequenceMarshal.TryGetReadOnlySequenceSegment(buffer, out ReadOnlySequenceSegment <char> startSegment, out int startIndex, out ReadOnlySequenceSegment <char> endSegment, out int endIndex));
Assert.False(SequenceMarshal.TryGetArray(buffer, out _));
}
public void Ctor_Array_Offset()
{
var buffer = new ReadOnlySequence <byte>(new byte[] { 1, 2, 3, 4, 5 }, 2, 3);
Assert.True(SequenceMarshal.TryGetArray(buffer, out ArraySegment <byte> array));
Assert.Equal(2, array.Offset);
Assert.Equal(3, array.Count);
Assert.False(SequenceMarshal.TryGetReadOnlySequenceSegment(buffer, out _, out _, out _, out _));
// Array can be retrieved with TryGetReadOnlyMemory
Assert.True(SequenceMarshal.TryGetReadOnlyMemory(buffer, out ReadOnlyMemory <byte> newMemory));
Assert.Equal(new byte[] { 3, 4, 5 }, newMemory.ToArray());
}
public void Ctor_Memory()
{
var memory = new ReadOnlyMemory <byte>(new byte[] { 1, 2, 3, 4, 5 });
var buffer = new ReadOnlySequence <byte>(memory.Slice(2, 3));
Assert.True(SequenceMarshal.TryGetReadOnlyMemory(buffer, out ReadOnlyMemory <byte> newMemory));
Assert.Equal(new byte[] { 3, 4, 5 }, newMemory.ToArray());
Assert.False(SequenceMarshal.TryGetReadOnlySequenceSegment(buffer, out ReadOnlySequenceSegment <byte> startSegment, out int startIndex, out ReadOnlySequenceSegment <byte> endSegment, out int endIndex));
// Memory is internally decomposed to its container so it would be accessible via TryGetArray
Assert.True(SequenceMarshal.TryGetArray(buffer, out ArraySegment <byte> array));
Assert.Equal(2, array.Offset);
Assert.Equal(3, array.Count);
}
public void Ctor_OwnedMemory_Offset()
{
var ownedMemory = new CustomMemoryForTest <byte>(new byte[] { 1, 2, 3, 4, 5 }, 0, 5);
var buffer = new ReadOnlySequence <byte>(ownedMemory, 2, 3);
Assert.True(SequenceMarshal.TryGetOwnedMemory(buffer, out OwnedMemory <byte> newOwnedMemory, out int start, out int length));
Assert.Equal(ownedMemory, newOwnedMemory);
Assert.Equal(2, start);
Assert.Equal(3, length);
Assert.False(SequenceMarshal.TryGetReadOnlySequenceSegment(buffer, out _, out _, out _, out _));
Assert.False(SequenceMarshal.TryGetArray(buffer, out _));
// OwnedMemory can be retrieved with TryGetReadOnlyMemory
Assert.True(SequenceMarshal.TryGetReadOnlyMemory(buffer, out ReadOnlyMemory <byte> newMemory));
Assert.Equal(new byte[] { 3, 4, 5 }, newMemory.ToArray());
}
private static List <ReadOnlySequenceSegment <byte> > GetSegments(ReadResult result)
{
SequenceMarshal.TryGetReadOnlySequenceSegment(
result.Buffer,
out ReadOnlySequenceSegment <byte> start,
out int startIndex,
out ReadOnlySequenceSegment <byte> end,
out int endIndex);
var segments = new List <ReadOnlySequenceSegment <byte> >();
while (start != end.Next)
{
segments.Add(start);
start = start.Next;
}
return(segments);
}
public void Ctor_IMemoryList_MultiBlock()
{
var memoryListSegment1 = new BufferSegment <byte>(new byte[] { 1, 2, 3 });
var memoryListSegment2 = memoryListSegment1.Append(new byte[] { 4, 5 });
var buffer = new ReadOnlySequence <byte>(memoryListSegment1, 2, memoryListSegment2, 1);
Assert.True(SequenceMarshal.TryGetReadOnlySequenceSegment(buffer, out ReadOnlySequenceSegment <byte> startSegment, out int startIndex, out ReadOnlySequenceSegment <byte> endSegment, out int endIndex));
Assert.Equal(startSegment, memoryListSegment1);
Assert.Equal(endSegment, memoryListSegment2);
Assert.Equal(2, startIndex);
Assert.Equal(1, endIndex);
Assert.False(SequenceMarshal.TryGetArray(buffer, out _));
// Multi-block can't be retrieved with TryGetReadOnlyMemory
Assert.False(SequenceMarshal.TryGetReadOnlyMemory(buffer, out _));
}
public void Ctor_IMemoryList_SingleBlock()
{
var memoryListSegment = new BufferSegment <byte>(new byte[] { 1, 2, 3, 4, 5 });
var buffer = new ReadOnlySequence <byte>(memoryListSegment, 2, memoryListSegment, 5);
Assert.True(SequenceMarshal.TryGetReadOnlySequenceSegment(buffer, out ReadOnlySequenceSegment <byte> startSegment, out int startIndex, out ReadOnlySequenceSegment <byte> endSegment, out int endIndex));
Assert.Equal(startSegment, memoryListSegment);
Assert.Equal(endSegment, memoryListSegment);
Assert.Equal(2, startIndex);
Assert.Equal(5, endIndex);
Assert.False(SequenceMarshal.TryGetArray(buffer, out _));
// Single block can be retrieved with TryGetReadOnlyMemory
Assert.True(SequenceMarshal.TryGetReadOnlyMemory(buffer, out ReadOnlyMemory <byte> newMemory));
Assert.Equal(new byte[] { 3, 4, 5 }, newMemory.ToArray());
}
public async Task GetMemoryOverMaxPoolSizeAllocatesArray()
{
using (var pool = new DisposeTrackingBufferPool())
{
var pipe = new Pipe(new PipeOptions(pool: pool));
// Allocate 5 KB
pipe.Writer.WriteEmpty(5 * 1024);
await pipe.Writer.FlushAsync();
pipe.Writer.Complete();
Assert.Equal(0, pool.CurrentlyRentedBlocks);
ReadResult result = await pipe.Reader.ReadAsync();
Assert.Equal(5 * 1024, result.Buffer.Length);
SequenceMarshal.TryGetReadOnlySequenceSegment(
result.Buffer,
out ReadOnlySequenceSegment <byte> start,
out int startIndex,
out ReadOnlySequenceSegment <byte> end,
out int endIndex);
var startSegment = (BufferSegment)start;
var endSegment = (BufferSegment)end;
Assert.Same(startSegment, endSegment);
// Check owner is array rather than a different type
Assert.IsType <byte[]>(startSegment.MemoryOwner);
pipe.Reader.AdvanceTo(result.Buffer.End);
pipe.Reader.Complete();
Assert.Equal(0, pool.CurrentlyRentedBlocks);
Assert.Equal(0, pool.DisposedBlocks);
}
}
public async Task GetMemoryAtMaxPoolSizeAllocatesFromPool()
{
using (var pool = new DisposeTrackingBufferPool())
{
var pipe = new Pipe(new PipeOptions(pool: pool));
pipe.Writer.WriteEmpty(pool.MaxBufferSize);
await pipe.Writer.FlushAsync();
pipe.Writer.Complete();
Assert.Equal(1, pool.CurrentlyRentedBlocks);
ReadResult result = await pipe.Reader.ReadAsync();
Assert.Equal(pool.MaxBufferSize, result.Buffer.Length);
SequenceMarshal.TryGetReadOnlySequenceSegment(
result.Buffer,
out ReadOnlySequenceSegment <byte> start,
out int startIndex,
out ReadOnlySequenceSegment <byte> end,
out int endIndex);
var startSegment = (BufferSegment)start;
var endSegment = (BufferSegment)end;
Assert.Same(startSegment, endSegment);
// Null owner implies that the buffer is allocated and wasn't rented from the pool
Assert.NotNull(startSegment.MemoryOwner);
pipe.Reader.AdvanceTo(result.Buffer.End);
pipe.Reader.Complete();
Assert.Equal(0, pool.CurrentlyRentedBlocks);
Assert.Equal(1, pool.DisposedBlocks);
}
}
public async Task ArrayPoolUsedByDefault()
{
WriteByteArray(20);
var reader = new StreamPipeReader(Stream);
var result = await reader.ReadAsync();
SequenceMarshal.TryGetReadOnlySequenceSegment(
result.Buffer,
out var startSegment,
out var startIndex,
out var endSegment,
out var endIndex);
var start = (BufferSegment)startSegment;
var end = (BufferSegment)endSegment;
Assert.Same(start, end);
Assert.IsType <byte[]>(start.MemoryOwner);
reader.AdvanceTo(result.Buffer.End);
reader.Complete();
}
public async Task ResetAfterCompleteReaderAndWriterWithoutAdvancingClearsEverything()
{
_pipe.Writer.WriteEmpty(4094);
_pipe.Writer.WriteEmpty(4094);
await _pipe.Writer.FlushAsync();
ReadResult result = await _pipe.Reader.ReadAsync();
ReadOnlySequence <byte> buffer = result.Buffer;
SequenceMarshal.TryGetReadOnlySequenceSegment(
buffer,
out ReadOnlySequenceSegment <byte> start,
out int startIndex,
out ReadOnlySequenceSegment <byte> end,
out int endIndex);
var startSegment = (BufferSegment)start;
var endSegment = (BufferSegment)end;
Assert.NotNull(startSegment.OwnedMemory);
Assert.NotNull(endSegment.OwnedMemory);
_pipe.Reader.Complete();
// Nothing cleaned up
Assert.NotNull(startSegment.OwnedMemory);
Assert.NotNull(endSegment.OwnedMemory);
_pipe.Writer.Complete();
// Should be cleaned up now
Assert.Null(startSegment.OwnedMemory);
Assert.Null(endSegment.OwnedMemory);
_pipe.Reset();
}