Merge pull request microsoft#851 from sharwell/memory-mapped-streams

Memory mapped streams
rajkumar42 · Jan 23, 2019 · d3ba24f · d3ba24f
2 parents 5f1367c + 1b8ed5d
commit d3ba24f
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Showing 9 changed files with 861 additions and 181 deletions.
diff --git a/src/Directory.Build.props b/src/Directory.Build.props
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <PropertyGroup>
-    <LangVersion>7</LangVersion>
+    <LangVersion>7.3</LangVersion>
     <Features>strict</Features>
   </PropertyGroup>
 

diff --git a/src/FastSerialization/FastSerialization.cs b/src/FastSerialization/FastSerialization.cs
@@ -174,6 +174,10 @@ interface IStreamReader : IDisposable
         /// </summary>
         string ReadString();
         /// <summary>
+        /// Read a span of bytes from the stream.
+        /// </summary>
+        void Read(Span<byte> span);
+        /// <summary>
         /// Read a StreamLabel (pointer to some other part of the stream) from the stream
         /// </summary>
         StreamLabel ReadLabel();
@@ -1126,6 +1130,17 @@ public IFastSerializable GetEntryObject()
         }
 
         // For FromStream method bodies.  
+        public void Read(Span<byte> span)
+        {
+#if DEBUG
+            StreamLabel label = reader.Current;
+#endif
+            reader.Read(span);
+#if DEBUG
+            Log("<Read Value=\"" + "[...]" + "\" StreamLabel=\"0x" + label.ToString("x") + "\"/>");
+#endif
+        }
+
         /// <summary>
         /// Read a bool from the stream
         /// </summary>

diff --git a/src/FastSerialization/FastSerialization.csproj b/src/FastSerialization/FastSerialization.csproj
@@ -13,6 +13,19 @@
     <Copyright>Copyright © Microsoft 2010</Copyright>
   </PropertyGroup>
 
+  <Choose>
+    <When Condition="'$(TargetFramework)' == 'netstandard1.3'">
+      <ItemGroup>
+        <PackageReference Include="System.IO.MemoryMappedFiles" Version="4.3.0" />
+        <PackageReference Include="System.Threading.Thread" Version="4.3.0" />
+      </ItemGroup>
+    </When>
+  </Choose>
+
+  <ItemGroup>
+    <PackageReference Include="System.Memory" Version="4.5.0" />
+  </ItemGroup>
+
   <PropertyGroup>
     <DefineConstants>$(DefineConstants);GROWABLEARRAY_PUBLIC;STREAMREADER_PUBLIC;FASTSERIALIZATION_PUBLIC</DefineConstants>
   </PropertyGroup>