Update hosting sample to also show hostfxr_run_app and hdt_get_functi…

…on_pointer (#6145)
dotnet · Sep 7, 2023 · ebc21d3 · ebc21d3
1 parent 86b2e72
commit ebc21d3
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Showing 6 changed files with 259 additions and 86 deletions.
diff --git a/core/hosting/build.proj b/core/hosting/build.proj
@@ -10,6 +10,7 @@
   <ItemGroup>
     <ProjectReference Include="src/NativeHost/*.csproj" />
     <ProjectReference Include="src/DotNetLib/*.csproj" />
+    <ProjectReference Include="src/App/*.csproj" />
   </ItemGroup>
 
 </Project>
diff --git a/core/hosting/readme.md b/core/hosting/readme.md
@@ -62,6 +62,19 @@ Hello, world! from CustomEntryPointUnmanagedCallersOnly in Lib
 -- number: -1
 ```
 
+To make this sample run a managed app instead of loading a class library, launch the `nativehost` passing `app` as a command line argument. The expected output will come from the `App` application:
+
+```console
+App started - args = [ app_arg_1, app_arg_2 ]
+Hello, world! from App [count: 1]
+-- message: from host!
+Hello, world! from App [count: 2]
+-- message: from host!
+Hello, world! from App [count: 3]
+-- message: from host!
+Signaling app to close
+```
+
 Note: The way the sample is built is relatively complicated. The goal is that it's possible to build and run the sample with simple `dotnet run` with minimal requirements on pre-installed tools. Typically, real-world projects that have both managed and native components will use different build systems for each; for example, msbuild/dotnet for managed and CMake for native.
 
 ## Visual Studio support

diff --git a/core/hosting/src/App/App.cs b/core/hosting/src/App/App.cs
@@ -0,0 +1,32 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+
+public class App
+{
+    private static byte isWaiting = 0;
+    private static int s_CallCount = 0;
+    private static ManualResetEvent mre = new ManualResetEvent(false);
+
+    public static void Main(string[] args)
+    {
+        Console.WriteLine($"{nameof(App)} started - args = [ {string.Join(", ", args)} ]");
+        isWaiting = 1;
+        mre.WaitOne();
+    }
+
+    [UnmanagedCallersOnly]
+    public static byte IsWaiting() => isWaiting;
+
+    [UnmanagedCallersOnly]
+    public static void Hello(IntPtr message)
+    {
+        Console.WriteLine($"Hello, world! from {nameof(App)} [count: {++s_CallCount}]");
+        Console.WriteLine($"-- message: {Marshal.PtrToStringUTF8(message)}");
+        if (s_CallCount >= 3)
+        {
+            Console.WriteLine("Signaling app to close");
+            mre.Set();
+        }
+    }
+}
diff --git a/core/hosting/src/App/App.csproj b/core/hosting/src/App/App.csproj
@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net6.0</TargetFramework>
+    <UseAppHost>false</UseAppHost>
+  </PropertyGroup>
+
+  <PropertyGroup>
+    <OutputPath>$(BinRoot)/$(Configuration)/</OutputPath>
+    <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
+  </PropertyGroup>
+
+</Project>
diff --git a/core/hosting/src/HostWithHostFxr.sln b/core/hosting/src/HostWithHostFxr.sln
@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 16
-VisualStudioVersion = 16.0.29102.190
+# Visual Studio Version 17
+VisualStudioVersion = 17.8.34030.414
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "NativeHost.vs", "NativeHost\NativeHost.vs.vcxproj", "{B99BC289-621D-4DB6-A964-2D869F8E0DD3}"
 EndProject
@@ -11,6 +11,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "build", "build", "{91651AB7
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "NativeHost", "NativeHost\NativeHost.csproj", "{0A829E27-48E8-4A1E-BD69-74A2DCFC87C7}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "App", "App\App.csproj", "{7E9BD819-E143-4347-9430-68B583BEFDB7}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -53,6 +55,18 @@ Global
 		{0A829E27-48E8-4A1E-BD69-74A2DCFC87C7}.Release|x64.Build.0 = Release|Any CPU
 		{0A829E27-48E8-4A1E-BD69-74A2DCFC87C7}.Release|x86.ActiveCfg = Release|Any CPU
 		{0A829E27-48E8-4A1E-BD69-74A2DCFC87C7}.Release|x86.Build.0 = Release|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Debug|x64.Build.0 = Debug|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Debug|x86.Build.0 = Debug|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Release|Any CPU.Build.0 = Release|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Release|x64.ActiveCfg = Release|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Release|x64.Build.0 = Release|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Release|x86.ActiveCfg = Release|Any CPU
+		{7E9BD819-E143-4347-9430-68B583BEFDB7}.Release|x86.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE