[C#] Fix and improve project files (#6142)
* [C#] Fix and improve project files * "net35" target included for Unity 5 * "net46" target included for Unity 2017 * "netstandard2.0" target included for Unity 2018 and general use * "netstandard2.1" target included for Span<T> support Included project properties for defining UNSAFE_BYTEBUFFER, BYTEBUFFER_NO_BOUNDS_CHECK, and ENABLE_SPAN_T conditional compilation symbols. * Add documentation on building for C#
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Conan Chen
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@ -14,14 +14,38 @@ documentation to build `flatc` and should be familiar with
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[Using the schema compiler](@ref flatbuffers_guide_using_schema_compiler) and
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[Writing a schema](@ref flatbuffers_guide_writing_schema).
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## FlatBuffers C-sharp code location
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## FlatBuffers C# code location
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The code for the FlatBuffers C# library can be found at
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`flatbuffers/net/FlatBuffers`. You can browse the library on the
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[FlatBuffers GitHub page](https://github.com/google/flatbuffers/tree/master/net/
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FlatBuffers).
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## Testing the FlatBuffers C-sharp libraries
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## Building the FlatBuffers C# library
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The `FlatBuffers.csproj` project contains multitargeting for .NET Standard 2.1,
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.NET Standard 2.0, and .NET Framework 4.6 (Unity 2017). Support for .NET
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Framework 3.5 (Unity 5) is provided by the `FlatBuffers.net35.csproj` project.
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In most cases (including Unity 2018 and newer), .NET Standard 2.0 is
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recommended.
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You can build for a specific framework target when using the cross-platform
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[.NET Core SDK](https://dotnet.microsoft.com/download) by adding the `-f`
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command line option:
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~~~{.sh}
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dotnet build -f netstandard2.0 "FlatBuffers.csproj"
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~~~
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The `FlatBuffers.csproj` project also provides support for defining various
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conditional compilation symbols (see "Conditional compilation symbols" section
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below) using the `-p` command line option:
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~~~{.sh}
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dotnet build -f netstandard2.1 -p:ENABLE_SPAN_T=true -p:UNSAFE_BYTEBUFFER=true "FlatBuffers.csproj"
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~~~
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## Testing the FlatBuffers C# library
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The code to test the libraries can be found at `flatbuffers/tests`.
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@ -31,7 +55,7 @@ tests, open `FlatBuffers.Test.csproj` in [Visual Studio](
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https://www.visualstudio.com), and compile/run the project.
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Optionally, you can run this using [Mono](http://www.mono-project.com/) instead.
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Once you have installed `Mono`, you can run the tests from the command line
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Once you have installed Mono, you can run the tests from the command line
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by running the following commands from inside the `FlatBuffers.Test` folder:
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~~~{.sh}
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@ -74,7 +98,7 @@ Now you can access the data from the `Monster monster`:
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Vec3 pos = monster.Pos;
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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C# code naming follows standard C# style with `PascalCasing` identifiers,
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C# code naming follows standard C# style with PascalCasing identifiers,
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e.g. `GetRootAsMyRootType`. Also, values (except vectors and unions) are
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available as properties instead of parameterless accessor methods.
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The performance-enhancing methods to which you can pass an already created
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@ -133,8 +157,8 @@ around using as little as possible of it. This does make the API clumsier
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For times when efficiency is less important a more convenient object based API
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can be used (through `--gen-object-api`) that is able to unpack & pack a
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FlatBuffer into objects and standard System.Collections.Generic containers, allowing for convenient
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construction, access and mutation.
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FlatBuffer into objects and standard `System.Collections.Generic` containers,
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allowing for convenient construction, access and mutation.
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To use:
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@ -172,4 +196,31 @@ add `Newtonsoft.Json` nuget package to csproj.
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* NuGet package Dependency
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* [Newtonsoft.Json](https://github.com/JamesNK/Newtonsoft.Json)
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## Conditional compilation symbols
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There are three conditional compilation symbols that have an impact on
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performance/features of the C# `ByteBuffer` implementation.
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* `UNSAFE_BYTEBUFFER`
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This will use unsafe code to manipulate the underlying byte array. This can
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yield a reasonable performance increase.
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* `BYTEBUFFER_NO_BOUNDS_CHECK`
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This will disable the bounds check asserts to the byte array. This can yield a
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small performance gain in normal code.
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* `ENABLE_SPAN_T`
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This will enable reading and writing blocks of memory with a `Span<T>` instead
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of just `T[]`. You can also enable writing directly to shared memory or other
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types of memory by providing a custom implementation of `ByteBufferAllocator`.
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`ENABLE_SPAN_T` also requires `UNSAFE_BYTEBUFFER` to be defined, or .NET
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Standard 2.1.
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Using `UNSAFE_BYTEBUFFER` and `BYTEBUFFER_NO_BOUNDS_CHECK` together can yield a
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performance gain of ~15% for some operations, however doing so is potentially
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dangerous. Do so at your own risk!
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<br>
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@ -14,7 +14,7 @@
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* limitations under the License.
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*/
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// There are 3 #defines that have an impact on performance / features of this ByteBuffer implementation
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// There are three conditional compilation symbols that have an impact on performance/features of this ByteBuffer implementation.
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//
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// UNSAFE_BYTEBUFFER
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// This will use unsafe code to manipulate the underlying byte array. This
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@ -22,13 +22,14 @@
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//
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// BYTEBUFFER_NO_BOUNDS_CHECK
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// This will disable the bounds check asserts to the byte array. This can
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// yield a small performance gain in normal code..
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// yield a small performance gain in normal code.
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//
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// ENABLE_SPAN_T
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// This will enable reading and writing blocks of memory with a Span<T> instead if just
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// This will enable reading and writing blocks of memory with a Span<T> instead of just
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// T[]. You can also enable writing directly to shared memory or other types of memory
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// by providing a custom implementation of ByteBufferAllocator.
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// ENABLE_SPAN_T also requires UNSAFE_BYTEBUFFER to be defined
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// ENABLE_SPAN_T also requires UNSAFE_BYTEBUFFER to be defined, or .NET
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// Standard 2.1.
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//
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// Using UNSAFE_BYTEBUFFER and BYTEBUFFER_NO_BOUNDS_CHECK together can yield a
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// performance gain of ~15% for some operations, however doing so is potentially
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@ -1,19 +0,0 @@
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<TargetFrameworks>netstandard2.0;netstandard2.1</TargetFrameworks>
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</PropertyGroup>
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<ItemGroup>
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<Compile Remove="Properties\**" />
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</ItemGroup>
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<ItemGroup>
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<EmbeddedResource Remove="Properties\**" />
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</ItemGroup>
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<ItemGroup>
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<None Remove="Properties\**" />
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</ItemGroup>
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</Project>
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@ -1,54 +1,23 @@
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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProjectGuid>{28C00774-1E73-4A75-AD8F-844CD21A064D}</ProjectGuid>
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<OutputType>Library</OutputType>
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<AppDesignerFolder>Properties</AppDesignerFolder>
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<RootNamespace>FlatBuffers</RootNamespace>
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<AssemblyName>FlatBuffers</AssemblyName>
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<TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
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<FileAlignment>512</FileAlignment>
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<TargetFrameworks>netstandard2.1;netstandard2.0;net46</TargetFrameworks>
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<GenerateAssemblyInfo>false</GenerateAssemblyInfo>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
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<DebugSymbols>true</DebugSymbols>
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<DebugType>full</DebugType>
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<Optimize>false</Optimize>
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<OutputPath>bin\Debug\</OutputPath>
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<DefineConstants>DEBUG;TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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<PropertyGroup Condition="'$(UNSAFE_BYTEBUFFER)' == 'true'">
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<DefineConstants>$(DefineConstants);UNSAFE_BYTEBUFFER</DefineConstants>
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<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
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<DebugType>pdbonly</DebugType>
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<Optimize>true</Optimize>
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<OutputPath>bin\Release\</OutputPath>
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<DefineConstants>TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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<PropertyGroup Condition="'$(BYTEBUFFER_NO_BOUNDS_CHECK)' == 'true'">
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<DefineConstants>$(DefineConstants);BYTEBUFFER_NO_BOUNDS_CHECK</DefineConstants>
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</PropertyGroup>
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<ItemGroup>
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<Reference Include="System" />
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<Reference Include="System.Core" />
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<PropertyGroup Condition="'$(ENABLE_SPAN_T)' == 'true'">
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<DefineConstants>$(DefineConstants);ENABLE_SPAN_T</DefineConstants>
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</PropertyGroup>
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<ItemGroup Condition="('$(ENABLE_SPAN_T)' == 'true') And (('$(TargetFramework)' == 'netstandard2.0') Or ('$(TargetFramework)' == 'net46'))">
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<PackageReference Include="System.Memory" Version="4.5.4" />
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</ItemGroup>
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<ItemGroup>
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<Compile Include="ByteBuffer.cs" />
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<Compile Include="FlatBufferBuilder.cs" />
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<Compile Include="FlatBufferConstants.cs" />
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<Compile Include="IFlatbufferObject.cs" />
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<Compile Include="Offset.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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<Compile Include="Struct.cs" />
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<Compile Include="Table.cs" />
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</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
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Other similar extension points exist, see Microsoft.Common.targets.
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<Target Name="BeforeBuild">
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</Target>
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<Target Name="AfterBuild">
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</Target>
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-->
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</Project>
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@ -0,0 +1,57 @@
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<?xml version="1.0" encoding="utf-8"?>
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<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
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<Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
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<PropertyGroup>
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<Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
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<Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
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<ProjectGuid>{28C00774-1E73-4A75-AD8F-844CD21A064D}</ProjectGuid>
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<OutputType>Library</OutputType>
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<AppDesignerFolder>Properties</AppDesignerFolder>
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<RootNamespace>FlatBuffers</RootNamespace>
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<AssemblyName>FlatBuffers</AssemblyName>
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<TargetFrameworkVersion>v3.5</TargetFrameworkVersion>
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<FileAlignment>512</FileAlignment>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
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<DebugSymbols>true</DebugSymbols>
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<DebugType>full</DebugType>
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<Optimize>false</Optimize>
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<OutputPath>bin\Debug\net35</OutputPath>
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<IntermediateOutputPath>obj\Debug\net35</IntermediateOutputPath>
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<DefineConstants>DEBUG;TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
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<DebugType>pdbonly</DebugType>
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<Optimize>true</Optimize>
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<OutputPath>bin\Release\net35</OutputPath>
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<IntermediateOutputPath>obj\Release\net35</IntermediateOutputPath>
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<DefineConstants>TRACE</DefineConstants>
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<ErrorReport>prompt</ErrorReport>
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<WarningLevel>4</WarningLevel>
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</PropertyGroup>
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<ItemGroup>
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<Reference Include="System" />
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<Reference Include="System.Core" />
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</ItemGroup>
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<ItemGroup>
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<Compile Include="ByteBuffer.cs" />
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<Compile Include="ByteBufferUtil.cs" />
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<Compile Include="FlatBufferBuilder.cs" />
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<Compile Include="FlatBufferConstants.cs" />
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<Compile Include="IFlatbufferObject.cs" />
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<Compile Include="Offset.cs" />
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<Compile Include="Properties\AssemblyInfo.cs" />
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<Compile Include="Struct.cs" />
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<Compile Include="Table.cs" />
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</ItemGroup>
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<Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
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<!-- To modify your build process, add your task inside one of the targets below and uncomment it.
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Other similar extension points exist, see Microsoft.Common.targets.
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<Target Name="BeforeBuild">
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</Target>
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<Target Name="AfterBuild">
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</Target>
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-->
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</Project>
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