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Imported Upstream version 5.0.0.42

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Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b
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Xamarin Public Jenkins (auto-signing)
2017-04-10 11:41:01 +00:00
parent 1190d13a04
commit 6bdd276d05
19939 changed files with 3099680 additions and 93811 deletions
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58
external/corefx/src/System.Buffers/System.Buffers.sln vendored Normal file
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Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio 14
VisualStudioVersion = 14.0.25420.1
MinimumVisualStudioVersion = 10.0.40219.1
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Buffers.Tests", "tests\System.Buffers.Tests.csproj", "{62E2AD5F-C8D0-45FB-B6A5-AED2C77F198C}"
ProjectSection(ProjectDependencies) = postProject
{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B} = {2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}
EndProjectSection
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Buffers", "src\System.Buffers.csproj", "{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}"
EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "src", "src", "{E7DDD72A-4A83-40E5-82E3-C24CB3B2C317}"
EndProject
Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{08302462-FA63-4153-9D08-0567D18237E7}"
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Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "pkg", "pkg", "{5BB3B990-6048-4153-A647-3F2958467EF5}"
ProjectSection(SolutionItems) = preProject
pkg\System.Buffers.builds = pkg\System.Buffers.builds
pkg\System.Buffers.pkgproj = pkg\System.Buffers.pkgproj
EndProjectSection
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "System.Buffers", "ref\System.Buffers.csproj", "{11AE73F7-3532-47B9-8FF6-B4F22D76456C}"
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Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
DebugNETCoreAppnetstandard1.1netstandard1.3|AnyCPU = DebugNETCoreAppnetstandard1.1netstandard1.3|AnyCPU
ReleaseNETCoreAppnetstandard1.1netstandard1.3|AnyCPU = ReleaseNETCoreAppnetstandard1.1netstandard1.3|AnyCPU
DebugNETCoreAppnetcoreappnetstandard1.3|AnyCPU = DebugNETCoreAppnetcoreappnetstandard1.3|AnyCPU
ReleaseNETCoreAppnetcoreappnetstandard1.3|AnyCPU = ReleaseNETCoreAppnetcoreappnetstandard1.3|AnyCPU
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{62E2AD5F-C8D0-45FB-B6A5-AED2C77F198C}.DebugNETCoreAppnetstandard1.1netstandard1.3|AnyCPU.Build.0 = netstandard1.3-Debug|Any CPU
{62E2AD5F-C8D0-45FB-B6A5-AED2C77F198C}.ReleaseNETCoreAppnetstandard1.1netstandard1.3|AnyCPU.ActiveCfg = netstandard1.3-Release|Any CPU
{62E2AD5F-C8D0-45FB-B6A5-AED2C77F198C}.ReleaseNETCoreAppnetstandard1.1netstandard1.3|AnyCPU.Build.0 = netstandard1.3-Release|Any CPU
{62E2AD5F-C8D0-45FB-B6A5-AED2C77F198C}.DebugNETCoreAppnetcoreappnetstandard1.3|AnyCPU.ActiveCfg = netstandard1.3-Debug|Any CPU
{62E2AD5F-C8D0-45FB-B6A5-AED2C77F198C}.DebugNETCoreAppnetcoreappnetstandard1.3|AnyCPU.Build.0 = netstandard1.3-Debug|Any CPU
{62E2AD5F-C8D0-45FB-B6A5-AED2C77F198C}.ReleaseNETCoreAppnetcoreappnetstandard1.3|AnyCPU.ActiveCfg = netstandard1.3-Release|Any CPU
{62E2AD5F-C8D0-45FB-B6A5-AED2C77F198C}.ReleaseNETCoreAppnetcoreappnetstandard1.3|AnyCPU.Build.0 = netstandard1.3-Release|Any CPU
{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}.DebugNETCoreAppnetstandard1.1netstandard1.3|AnyCPU.ActiveCfg = netstandard1.1-Debug|Any CPU
{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}.DebugNETCoreAppnetstandard1.1netstandard1.3|AnyCPU.Build.0 = netstandard1.1-Debug|Any CPU
{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}.ReleaseNETCoreAppnetstandard1.1netstandard1.3|AnyCPU.ActiveCfg = netstandard1.1-Release|Any CPU
{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}.ReleaseNETCoreAppnetstandard1.1netstandard1.3|AnyCPU.Build.0 = netstandard1.1-Release|Any CPU
{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}.DebugNETCoreAppnetcoreappnetstandard1.3|AnyCPU.ActiveCfg = netcoreapp-Debug|Any CPU
{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}.DebugNETCoreAppnetcoreappnetstandard1.3|AnyCPU.Build.0 = netcoreapp-Debug|Any CPU
{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}.ReleaseNETCoreAppnetcoreappnetstandard1.3|AnyCPU.ActiveCfg = netcoreapp-Release|Any CPU
{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}.ReleaseNETCoreAppnetcoreappnetstandard1.3|AnyCPU.Build.0 = netcoreapp-Release|Any CPU
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HideSolutionNode = FALSE
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GlobalSection(NestedProjects) = preSolution
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{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B} = {2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}
EndGlobalSection
EndGlobal

8
external/corefx/src/System.Buffers/dir.props vendored Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="..\dir.props" />
<PropertyGroup>
<AssemblyVersion>4.0.2.0</AssemblyVersion>
<IsNETCoreApp>true</IsNETCoreApp>
</PropertyGroup>
</Project>

8
external/corefx/src/System.Buffers/pkg/System.Buffers.builds vendored Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
<ItemGroup>
<Project Include="System.Buffers.pkgproj" />
</ItemGroup>
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.traversal.targets))\dir.traversal.targets" />
</Project>

11
external/corefx/src/System.Buffers/pkg/System.Buffers.pkgproj vendored Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
<ItemGroup>
<ProjectReference Include="..\ref\System.Buffers.builds">
<SupportedFramework>net45;netcore45;netcoreapp1.0;wpa81;$(AllXamarinFrameworks)</SupportedFramework>
</ProjectReference>
<ProjectReference Include="..\src\System.Buffers.builds" />
</ItemGroup>
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
</Project>

8
external/corefx/src/System.Buffers/ref/Configurations.props vendored Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<BuildConfigurations>
netstandard;
</BuildConfigurations>
</PropertyGroup>
</Project>

8
external/corefx/src/System.Buffers/ref/System.Buffers.builds vendored Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
<ItemGroup>
<Project Include="System.Buffers.csproj" />
</ItemGroup>
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.traversal.targets))\dir.traversal.targets" />
</Project>

18
external/corefx/src/System.Buffers/ref/System.Buffers.cs vendored Normal file
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
// ------------------------------------------------------------------------------
// Changes to this file must follow the http://aka.ms/api-review process.
// ------------------------------------------------------------------------------
namespace System.Buffers
{
public abstract class ArrayPool<T>
{
public static ArrayPool<T> Shared { get { throw null; } }
public static ArrayPool<T> Create() { throw null; }
public static ArrayPool<T> Create(int maxArrayLength, int maxArraysPerBucket) { throw null; }
public abstract T[] Rent(int minimumLength);
public abstract void Return(T[] array, bool clearArray = false);
}
}

14
external/corefx/src/System.Buffers/ref/System.Buffers.csproj vendored Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="Build">
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
<PropertyGroup>
<ProjectGuid>{11AE73F7-3532-47B9-8FF6-B4F22D76456C}</ProjectGuid>
<UseOpenKey Condition="'$(UseOpenKey)'==''">true</UseOpenKey>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netstandard-Debug|AnyCPU'" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netstandard-Release|AnyCPU'" />
<ItemGroup>
<Compile Include="System.Buffers.cs" />
</ItemGroup>
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
</Project>

9
external/corefx/src/System.Buffers/src/Configurations.props vendored Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<BuildConfigurations>
netstandard1.1;
netcoreapp;
</BuildConfigurations>
</PropertyGroup>
</Project>

123
external/corefx/src/System.Buffers/src/Resources/Strings.resx vendored Normal file
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<?xml version="1.0" encoding="utf-8"?>
<root>
<!--
Microsoft ResX Schema
Version 2.0
The primary goals of this format is to allow a simple XML format
that is mostly human readable. The generation and parsing of the
various data types are done through the TypeConverter classes
associated with the data types.
Example:
... ado.net/XML headers & schema ...
<resheader name="resmimetype">text/microsoft-resx</resheader>
<resheader name="version">2.0</resheader>
<resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
<resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
<data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
<data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
<data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
<value>[base64 mime encoded serialized .NET Framework object]</value>
</data>
<data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
<value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
<comment>This is a comment</comment>
</data>
There are any number of "resheader" rows that contain simple
name/value pairs.
Each data row contains a name, and value. The row also contains a
type or mimetype. Type corresponds to a .NET class that support
text/value conversion through the TypeConverter architecture.
Classes that don't support this are serialized and stored with the
mimetype set.
The mimetype is used for serialized objects, and tells the
ResXResourceReader how to depersist the object. This is currently not
extensible. For a given mimetype the value must be set accordingly:
Note - application/x-microsoft.net.object.binary.base64 is the format
that the ResXResourceWriter will generate, however the reader can
read any of the formats listed below.
mimetype: application/x-microsoft.net.object.binary.base64
value : The object must be serialized with
: System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
: and then encoded with base64 encoding.
mimetype: application/x-microsoft.net.object.soap.base64
value : The object must be serialized with
: System.Runtime.Serialization.Formatters.Soap.SoapFormatter
: and then encoded with base64 encoding.
mimetype: application/x-microsoft.net.object.bytearray.base64
value : The object must be serialized into a byte array
: using a System.ComponentModel.TypeConverter
: and then encoded with base64 encoding.
-->
<xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
<xsd:element name="root" msdata:IsDataSet="true">
<xsd:complexType>
<xsd:choice maxOccurs="unbounded">
<xsd:element name="metadata">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="xsd:string" minOccurs="0" />
</xsd:sequence>
<xsd:attribute name="name" use="required" type="xsd:string" />
<xsd:attribute name="type" type="xsd:string" />
<xsd:attribute name="mimetype" type="xsd:string" />
<xsd:attribute ref="xml:space" />
</xsd:complexType>
</xsd:element>
<xsd:element name="assembly">
<xsd:complexType>
<xsd:attribute name="alias" type="xsd:string" />
<xsd:attribute name="name" type="xsd:string" />
</xsd:complexType>
</xsd:element>
<xsd:element name="data">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
<xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
</xsd:sequence>
<xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
<xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
<xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
<xsd:attribute ref="xml:space" />
</xsd:complexType>
</xsd:element>
<xsd:element name="resheader">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
</xsd:sequence>
<xsd:attribute name="name" type="xsd:string" use="required" />
</xsd:complexType>
</xsd:element>
</xsd:choice>
</xsd:complexType>
</xsd:element>
</xsd:schema>
<resheader name="resmimetype">
<value>text/microsoft-resx</value>
</resheader>
<resheader name="version">
<value>2.0</value>
</resheader>
<resheader name="reader">
<value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
</resheader>
<resheader name="writer">
<value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
</resheader>
<data name="ArgumentException_BufferNotFromPool" xml:space="preserve">
<value>The buffer is not associated with this pool and may not be returned to it.</value>
</data>
</root>

30
external/corefx/src/System.Buffers/src/System.Buffers.csproj vendored Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="Build">
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
<PropertyGroup>
<ProjectGuid>{2ADDB484-6F57-4D71-A3FE-A57EC6329A2B}</ProjectGuid>
<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
<DocumentationFile>$(OutputPath)$(AssemblyName).xml</DocumentationFile>
<UseOpenKey Condition="'$(UseOpenKey)'==''">true</UseOpenKey>
<IsPartialFacadeAssembly Condition="'$(TargetGroup)' == 'netcoreapp'">true</IsPartialFacadeAssembly>
</PropertyGroup>
<!-- Default configurations to help VS understand the options -->
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='netstandard1.1-Debug|AnyCPU'" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='netstandard1.1-Release|AnyCPU'" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='netcoreapp-Debug|AnyCPU'" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='netcoreapp-Release|AnyCPU'" />
<ItemGroup Condition="'$(TargetGroup)' == 'netstandard1.1'">
<Compile Include="System\Buffers\ArrayPool.cs" />
<Compile Include="System\Buffers\ArrayPoolEventSource.cs" />
<Compile Include="System\Buffers\DefaultArrayPool.cs" />
<Compile Include="System\Buffers\DefaultArrayPoolBucket.cs" />
<Compile Include="System\Buffers\Utilities.cs" />
</ItemGroup>
<ItemGroup Condition="'$(TargetGroup)' == 'netcoreapp'">
<TargetingPackReference Include="System.Private.CoreLib" />
</ItemGroup>
<ItemGroup>
<ReferenceFromRuntime Include="System.Private.CoreLib" />
</ItemGroup>
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
</Project>

121
external/corefx/src/System.Buffers/src/System/Buffers/ArrayPool.cs vendored Normal file
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Runtime.CompilerServices;
using System.Threading;
namespace System.Buffers
{
/// <summary>
/// Provides a resource pool that enables reusing instances of type <see cref="T:T[]"/>.
/// </summary>
/// <remarks>
/// <para>
/// Renting and returning buffers with an <see cref="ArrayPool{T}"/> can increase performance
/// in situations where arrays are created and destroyed frequently, resulting in significant
/// memory pressure on the garbage collector.
/// </para>
/// <para>
/// This class is thread-safe. All members may be used by multiple threads concurrently.
/// </para>
/// </remarks>
#if !MONO
public
#endif
abstract class ArrayPool<T>
{
/// <summary>The lazily-initialized shared pool instance.</summary>
private static ArrayPool<T> s_sharedInstance = null;
/// <summary>
/// Retrieves a shared <see cref="ArrayPool{T}"/> instance.
/// </summary>
/// <remarks>
/// The shared pool provides a default implementation of <see cref="ArrayPool{T}"/>
/// that's intended for general applicability. It maintains arrays of multiple sizes, and
/// may hand back a larger array than was actually requested, but will never hand back a smaller
/// array than was requested. Renting a buffer from it with <see cref="Rent"/> will result in an
/// existing buffer being taken from the pool if an appropriate buffer is available or in a new
/// buffer being allocated if one is not available.
/// </remarks>
public static ArrayPool<T> Shared
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get { return Volatile.Read(ref s_sharedInstance) ?? EnsureSharedCreated(); }
}
/// <summary>Ensures that <see cref="s_sharedInstance"/> has been initialized to a pool and returns it.</summary>
[MethodImpl(MethodImplOptions.NoInlining)]
private static ArrayPool<T> EnsureSharedCreated()
{
Interlocked.CompareExchange(ref s_sharedInstance, Create(), null);
return s_sharedInstance;
}
/// <summary>
/// Creates a new <see cref="ArrayPool{T}"/> instance using default configuration options.
/// </summary>
/// <returns>A new <see cref="ArrayPool{T}"/> instance.</returns>
public static ArrayPool<T> Create()
{
return new DefaultArrayPool<T>();
}
/// <summary>
/// Creates a new <see cref="ArrayPool{T}"/> instance using custom configuration options.
/// </summary>
/// <param name="maxArrayLength">The maximum length of array instances that may be stored in the pool.</param>
/// <param name="maxArraysPerBucket">
/// The maximum number of array instances that may be stored in each bucket in the pool. The pool
/// groups arrays of similar lengths into buckets for faster access.
/// </param>
/// <returns>A new <see cref="ArrayPool{T}"/> instance with the specified configuration options.</returns>
/// <remarks>
/// The created pool will group arrays into buckets, with no more than <paramref name="maxArraysPerBucket"/>
/// in each bucket and with those arrays not exceeding <paramref name="maxArrayLength"/> in length.
/// </remarks>
public static ArrayPool<T> Create(int maxArrayLength, int maxArraysPerBucket)
{
return new DefaultArrayPool<T>(maxArrayLength, maxArraysPerBucket);
}
/// <summary>
/// Retrieves a buffer that is at least the requested length.
/// </summary>
/// <param name="minimumLength">The minimum length of the array needed.</param>
/// <returns>
/// An <see cref="T:T[]"/> that is at least <paramref name="minimumLength"/> in length.
/// </returns>
/// <remarks>
/// This buffer is loaned to the caller and should be returned to the same pool via
/// <see cref="Return"/> so that it may be reused in subsequent usage of <see cref="Rent"/>.
/// It is not a fatal error to not return a rented buffer, but failure to do so may lead to
/// decreased application performance, as the pool may need to create a new buffer to replace
/// the one lost.
/// </remarks>
public abstract T[] Rent(int minimumLength);
/// <summary>
/// Returns to the pool an array that was previously obtained via <see cref="Rent"/> on the same
/// <see cref="ArrayPool{T}"/> instance.
/// </summary>
/// <param name="array">
/// The buffer previously obtained from <see cref="Rent"/> to return to the pool.
/// </param>
/// <param name="clearArray">
/// If <c>true</c> and if the pool will store the buffer to enable subsequent reuse, <see cref="Return"/>
/// will clear <paramref name="array"/> of its contents so that a subsequent consumer via <see cref="Rent"/>
/// will not see the previous consumer's content. If <c>false</c> or if the pool will release the buffer,
/// the array's contents are left unchanged.
/// </param>
/// <remarks>
/// Once a buffer has been returned to the pool, the caller gives up all ownership of the buffer
/// and must not use it. The reference returned from a given call to <see cref="Rent"/> must only be
/// returned via <see cref="Return"/> once. The default <see cref="ArrayPool{T}"/>
/// may hold onto the returned buffer in order to rent it again, or it may release the returned buffer
/// if it's determined that the pool already has enough buffers stored.
/// </remarks>
public abstract void Return(T[] array, bool clearArray = false);
}
}

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external/corefx/src/System.Buffers/src/System/Buffers/ArrayPoolEventSource.cs vendored Normal file
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Diagnostics.Tracing;
namespace System.Buffers
{
[EventSource(Name = "System.Buffers.ArrayPoolEventSource")]
internal sealed class ArrayPoolEventSource : EventSource
{
internal static readonly ArrayPoolEventSource Log = new ArrayPoolEventSource();
/// <summary>The reason for a BufferAllocated event.</summary>
internal enum BufferAllocatedReason : int
{
/// <summary>The pool is allocating a buffer to be pooled in a bucket.</summary>
Pooled,
/// <summary>The requested buffer size was too large to be pooled.</summary>
OverMaximumSize,
/// <summary>The pool has already allocated for pooling as many buffers of a particular size as it's allowed.</summary>
PoolExhausted
}
/// <summary>
/// Event for when a buffer is rented. This is invoked once for every successful call to Rent,
/// regardless of whether a buffer is allocated or a buffer is taken from the pool. In a
/// perfect situation where all rented buffers are returned, we expect to see the number
/// of BufferRented events exactly match the number of BuferReturned events, with the number
/// of BufferAllocated events being less than or equal to those numbers (ideally significantly
/// less than).
/// </summary>
[Event(1, Level = EventLevel.Verbose)]
internal unsafe void BufferRented(int bufferId, int bufferSize, int poolId, int bucketId)
{
EventData* payload = stackalloc EventData[4];
payload[0].Size = sizeof(int);
payload[0].DataPointer = ((IntPtr)(&bufferId));
payload[1].Size = sizeof(int);
payload[1].DataPointer = ((IntPtr)(&bufferSize));
payload[2].Size = sizeof(int);
payload[2].DataPointer = ((IntPtr)(&poolId));
payload[3].Size = sizeof(int);
payload[3].DataPointer = ((IntPtr)(&bucketId));
WriteEventCore(1, 4, payload);
}
/// <summary>
/// Event for when a buffer is allocated by the pool. In an ideal situation, the number
/// of BufferAllocated events is significantly smaller than the number of BufferRented and
/// BufferReturned events.
/// </summary>
[Event(2, Level = EventLevel.Informational)]
internal unsafe void BufferAllocated(int bufferId, int bufferSize, int poolId, int bucketId, BufferAllocatedReason reason)
{
EventData* payload = stackalloc EventData[5];
payload[0].Size = sizeof(int);
payload[0].DataPointer = ((IntPtr)(&bufferId));
payload[1].Size = sizeof(int);
payload[1].DataPointer = ((IntPtr)(&bufferSize));
payload[2].Size = sizeof(int);
payload[2].DataPointer = ((IntPtr)(&poolId));
payload[3].Size = sizeof(int);
payload[3].DataPointer = ((IntPtr)(&bucketId));
payload[4].Size = sizeof(BufferAllocatedReason);
payload[4].DataPointer = ((IntPtr)(&reason));
WriteEventCore(2, 5, payload);
}
/// <summary>
/// Event raised when a buffer is returned to the pool. This event is raised regardless of whether
/// the returned buffer is stored or dropped. In an ideal situation, the number of BufferReturned
/// events exactly matches the number of BufferRented events.
/// </summary>
[Event(3, Level = EventLevel.Verbose)]
internal void BufferReturned(int bufferId, int bufferSize, int poolId) => WriteEvent(3, bufferId, bufferSize, poolId);
}
}

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external/corefx/src/System.Buffers/src/System/Buffers/DefaultArrayPool.cs vendored Normal file
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
namespace System.Buffers
{
internal sealed partial class DefaultArrayPool<T> : ArrayPool<T>
{
/// <summary>The default maximum length of each array in the pool (2^20).</summary>
private const int DefaultMaxArrayLength = 1024 * 1024;
/// <summary>The default maximum number of arrays per bucket that are available for rent.</summary>
private const int DefaultMaxNumberOfArraysPerBucket = 50;
/// <summary>Lazily-allocated empty array used when arrays of length 0 are requested.</summary>
private static T[] s_emptyArray; // we support contracts earlier than those with Array.Empty<T>()
private readonly Bucket[] _buckets;
internal DefaultArrayPool() : this(DefaultMaxArrayLength, DefaultMaxNumberOfArraysPerBucket)
{
}
internal DefaultArrayPool(int maxArrayLength, int maxArraysPerBucket)
{
if (maxArrayLength <= 0)
{
throw new ArgumentOutOfRangeException(nameof(maxArrayLength));
}
if (maxArraysPerBucket <= 0)
{
throw new ArgumentOutOfRangeException(nameof(maxArraysPerBucket));
}
// Our bucketing algorithm has a min length of 2^4 and a max length of 2^30.
// Constrain the actual max used to those values.
const int MinimumArrayLength = 0x10, MaximumArrayLength = 0x40000000;
if (maxArrayLength > MaximumArrayLength)
{
maxArrayLength = MaximumArrayLength;
}
else if (maxArrayLength < MinimumArrayLength)
{
maxArrayLength = MinimumArrayLength;
}
// Create the buckets.
int poolId = Id;
int maxBuckets = Utilities.SelectBucketIndex(maxArrayLength);
var buckets = new Bucket[maxBuckets + 1];
for (int i = 0; i < buckets.Length; i++)
{
buckets[i] = new Bucket(Utilities.GetMaxSizeForBucket(i), maxArraysPerBucket, poolId);
}
_buckets = buckets;
}
/// <summary>Gets an ID for the pool to use with events.</summary>
private int Id => GetHashCode();
public override T[] Rent(int minimumLength)
{
// Arrays can't be smaller than zero. We allow requesting zero-length arrays (even though
// pooling such an array isn't valuable) as it's a valid length array, and we want the pool
// to be usable in general instead of using `new`, even for computed lengths.
if (minimumLength < 0)
{
throw new ArgumentOutOfRangeException(nameof(minimumLength));
}
else if (minimumLength == 0)
{
// No need for events with the empty array. Our pool is effectively infinite
// and we'll never allocate for rents and never store for returns.
return s_emptyArray ?? (s_emptyArray = new T[0]);
}
var log = ArrayPoolEventSource.Log;
T[] buffer = null;
int index = Utilities.SelectBucketIndex(minimumLength);
if (index < _buckets.Length)
{
// Search for an array starting at the 'index' bucket. If the bucket is empty, bump up to the
// next higher bucket and try that one, but only try at most a few buckets.
const int MaxBucketsToTry = 2;
int i = index;
do
{
// Attempt to rent from the bucket. If we get a buffer from it, return it.
buffer = _buckets[i].Rent();
if (buffer != null)
{
if (log.IsEnabled())
{
log.BufferRented(buffer.GetHashCode(), buffer.Length, Id, _buckets[i].Id);
}
return buffer;
}
}
while (++i < _buckets.Length && i != index + MaxBucketsToTry);
// The pool was exhausted for this buffer size. Allocate a new buffer with a size corresponding
// to the appropriate bucket.
buffer = new T[_buckets[index]._bufferLength];
}
else
{
// The request was for a size too large for the pool. Allocate an array of exactly the requested length.
// When it's returned to the pool, we'll simply throw it away.
buffer = new T[minimumLength];
}
if (log.IsEnabled())
{
int bufferId = buffer.GetHashCode(), bucketId = -1; // no bucket for an on-demand allocated buffer
log.BufferRented(bufferId, buffer.Length, Id, bucketId);
log.BufferAllocated(bufferId, buffer.Length, Id, bucketId, index >= _buckets.Length ?
ArrayPoolEventSource.BufferAllocatedReason.OverMaximumSize : ArrayPoolEventSource.BufferAllocatedReason.PoolExhausted);
}
return buffer;
}
public override void Return(T[] array, bool clearArray = false)
{
if (array == null)
{
throw new ArgumentNullException(nameof(array));
}
else if (array.Length == 0)
{
// Ignore empty arrays. When a zero-length array is rented, we return a singleton
// rather than actually taking a buffer out of the lowest bucket.
return;
}
// Determine with what bucket this array length is associated
int bucket = Utilities.SelectBucketIndex(array.Length);
// If we can tell that the buffer was allocated, drop it. Otherwise, check if we have space in the pool
if (bucket < _buckets.Length)
{
// Clear the array if the user requests
if (clearArray)
{
Array.Clear(array, 0, array.Length);
}
// Return the buffer to its bucket. In the future, we might consider having Return return false
// instead of dropping a bucket, in which case we could try to return to a lower-sized bucket,
// just as how in Rent we allow renting from a higher-sized bucket.
_buckets[bucket].Return(array);
}
// Log that the buffer was returned
var log = ArrayPoolEventSource.Log;
if (log.IsEnabled())
{
log.BufferReturned(array.GetHashCode(), array.Length, Id);
}
}
}
}

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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Diagnostics;
using System.Threading;
namespace System.Buffers
{
internal sealed partial class DefaultArrayPool<T> : ArrayPool<T>
{
/// <summary>Provides a thread-safe bucket containing buffers that can be Rent'd and Return'd.</summary>
private sealed class Bucket
{
internal readonly int _bufferLength;
private readonly T[][] _buffers;
private readonly int _poolId;
private SpinLock _lock; // do not make this readonly; it's a mutable struct
private int _index;
/// <summary>
/// Creates the pool with numberOfBuffers arrays where each buffer is of bufferLength length.
/// </summary>
internal Bucket(int bufferLength, int numberOfBuffers, int poolId)
{
_lock = new SpinLock(Debugger.IsAttached); // only enable thread tracking if debugger is attached; it adds non-trivial overheads to Enter/Exit
_buffers = new T[numberOfBuffers][];
_bufferLength = bufferLength;
_poolId = poolId;
}
/// <summary>Gets an ID for the bucket to use with events.</summary>
internal int Id => GetHashCode();
/// <summary>Takes an array from the bucket. If the bucket is empty, returns null.</summary>
internal T[] Rent()
{
T[][] buffers = _buffers;
T[] buffer = null;
// While holding the lock, grab whatever is at the next available index and
// update the index. We do as little work as possible while holding the spin
// lock to minimize contention with other threads. The try/finally is
// necessary to properly handle thread aborts on platforms which have them.
bool lockTaken = false, allocateBuffer = false;
try
{
_lock.Enter(ref lockTaken);
if (_index < buffers.Length)
{
buffer = buffers[_index];
buffers[_index++] = null;
allocateBuffer = buffer == null;
}
}
finally
{
if (lockTaken) _lock.Exit(false);
}
// While we were holding the lock, we grabbed whatever was at the next available index, if
// there was one. If we tried and if we got back null, that means we hadn't yet allocated
// for that slot, in which case we should do so now.
if (allocateBuffer)
{
buffer = new T[_bufferLength];
var log = ArrayPoolEventSource.Log;
if (log.IsEnabled())
{
log.BufferAllocated(buffer.GetHashCode(), _bufferLength, _poolId, Id,
ArrayPoolEventSource.BufferAllocatedReason.Pooled);
}
}
return buffer;
}
/// <summary>
/// Attempts to return the buffer to the bucket. If successful, the buffer will be stored
/// in the bucket and true will be returned; otherwise, the buffer won't be stored, and false
/// will be returned.
/// </summary>
internal void Return(T[] array)
{
// Check to see if the buffer is the correct size for this bucket
if (array.Length != _bufferLength)
{
throw new ArgumentException(SR.ArgumentException_BufferNotFromPool, nameof(array));
}
// While holding the spin lock, if there's room available in the bucket,
// put the buffer into the next available slot. Otherwise, we just drop it.
// The try/finally is necessary to properly handle thread aborts on platforms
// which have them.
bool lockTaken = false;
try
{
_lock.Enter(ref lockTaken);
if (_index != 0)
{
_buffers[--_index] = array;
}
}
finally
{
if (lockTaken) _lock.Exit(false);
}
}
}
}
}

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external/corefx/src/System.Buffers/src/System/Buffers/Utilities.cs vendored Normal file
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Diagnostics;
using System.Runtime.CompilerServices;
namespace System.Buffers
{
internal static class Utilities
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
internal static int SelectBucketIndex(int bufferSize)
{
Debug.Assert(bufferSize > 0);
uint bitsRemaining = ((uint)bufferSize - 1) >> 4;
int poolIndex = 0;
if (bitsRemaining > 0xFFFF) { bitsRemaining >>= 16; poolIndex = 16; }
if (bitsRemaining > 0xFF) { bitsRemaining >>= 8; poolIndex += 8; }
if (bitsRemaining > 0xF) { bitsRemaining >>= 4; poolIndex += 4; }
if (bitsRemaining > 0x3) { bitsRemaining >>= 2; poolIndex += 2; }
if (bitsRemaining > 0x1) { bitsRemaining >>= 1; poolIndex += 1; }
return poolIndex + (int)bitsRemaining;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
internal static int GetMaxSizeForBucket(int binIndex)
{
int maxSize = 16 << binIndex;
Debug.Assert(maxSize >= 0);
return maxSize;
}
}
}

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external/corefx/src/System.Buffers/tests/Configurations.props vendored Normal file
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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<PropertyGroup>
<BuildConfigurations>
netstandard1.3;
</BuildConfigurations>
</PropertyGroup>
</Project>

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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
<ItemGroup>
<Project Include="System.Buffers.Tests.csproj" />
<Project Include="System.Buffers.Tests.csproj">
<OSGroup>Windows_NT</OSGroup>
<TestTFMs>netcore50;net46</TestTFMs>
</Project>
<Project Include="System.Buffers.Tests.csproj">
<TestTFMs>netcoreapp1.0</TestTFMs>
</Project>
</ItemGroup>
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.traversal.targets))\dir.traversal.targets" />
</Project>

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<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="Build">
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
<PropertyGroup>
<ProjectGuid>{62E2AD5F-C8D0-45FB-B6A5-AED2C77F198C}</ProjectGuid>
</PropertyGroup>
<PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netstandard1.3-Debug|AnyCPU'" />
<PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netstandard1.3-Release|AnyCPU'" />
<ItemGroup>
<Compile Include="ArrayPool\UnitTests.cs" />
<Compile Include="$(CommonTestPath)\System\Diagnostics\Tracing\TestEventListener.cs" />
</ItemGroup>
<Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.targets))\dir.targets" />
</Project>