[new] generate Managed2NativeFunction for PInvoke method

Author: pirunxi

Editor/Commands/MethodBridgeGeneratorCommand.cs

@@ -31,7 +31,7 @@ public static void CleanIl2CppBuildCache()
             Directory.Delete(il2cppBuildCachePath, true);
         }
 
-        private static void GenerateMethodBridgeCppFile(IReadOnlyCollection<GenericMethod> genericMethods, List<RawReversePInvokeMethodInfo> reversePInvokeMethods, IReadOnlyCollection<RawCalliMethodSignatureInfo> calliMethodSignatures, string tempFile, string outputFile)
+        private static void GenerateMethodBridgeCppFile(IReadOnlyCollection<GenericMethod> genericMethods, List<RawReversePInvokeMethodInfo> reversePInvokeMethods, IReadOnlyCollection<CallNativeMethodSignatureInfo> calliMethodSignatures, string tempFile, string outputFile)
         {
             string templateCode = File.ReadAllText(tempFile, Encoding.UTF8);
             var g = new Generator(new Generator.Options()
@@ -83,11 +83,15 @@ public static void GenerateMethodBridgeAndReversePInvokeWrapper(BuildTarget targ
 
             var calliAnalyzer = new CalliAnalyzer(cache, hotUpdateDlls);
             calliAnalyzer.Run();
+            var pinvokeAnalyzer = new PInvokeAnalyzer(cache, hotUpdateDlls);
+            pinvokeAnalyzer.Run();
+            var callPInvokeMethodSignatures = pinvokeAnalyzer.PInvokeMethodSignatures;
 
             string templateFile = $"{SettingsUtil.TemplatePathInPackage}/MethodBridge.cpp.tpl";
             string outputFile = $"{SettingsUtil.GeneratedCppDir}/MethodBridge.cpp";
 
-            GenerateMethodBridgeCppFile(methodBridgeAnalyzer.GenericMethods, reversePInvokeAnalyzer.ReversePInvokeMethods, calliAnalyzer.CalliMethodSignatures, templateFile, outputFile);
+            var callNativeMethodSignatures = calliAnalyzer.CalliMethodSignatures.Concat(pinvokeAnalyzer.PInvokeMethodSignatures).ToList();
+            GenerateMethodBridgeCppFile(methodBridgeAnalyzer.GenericMethods, reversePInvokeAnalyzer.ReversePInvokeMethods, callNativeMethodSignatures, templateFile, outputFile);
 
             CleanIl2CppBuildCache();
         }

Editor/MethodBridge/PInvokeAnalyzer.cs

@@ -0,0 +1,46 @@
+using dnlib.DotNet;
+using HybridCLR.Editor.Meta;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using UnityEngine;
+
+namespace HybridCLR.Editor.MethodBridge
+{
+
+    public class PInvokeAnalyzer
+    {
+        private readonly List<ModuleDefMD> _rootModules = new List<ModuleDefMD>();
+
+        private readonly List<CallNativeMethodSignatureInfo> _pinvokeMethodSignatures = new List<CallNativeMethodSignatureInfo>();
+
+        public List<CallNativeMethodSignatureInfo> PInvokeMethodSignatures => _pinvokeMethodSignatures;
+
+        public PInvokeAnalyzer(AssemblyCache cache, List<string> assemblyNames)
+        {
+            foreach (var assemblyName in assemblyNames)
+            {
+                _rootModules.Add(cache.LoadModule(assemblyName));
+            }
+        }
+
+        public void Run()
+        {
+            foreach (var mod in _rootModules)
+            {
+                foreach (TypeDef type in mod.GetTypes())
+                {
+                    foreach (MethodDef method in type.Methods)
+                    {
+                        if (method.IsPinvokeImpl)
+                        {
+                            _pinvokeMethodSignatures.Add(new CallNativeMethodSignatureInfo { MethodSig = method.MethodSig });
+                        }
+                    }
+                }
+            }
+        }
+    }
+}