1 files changed, 74 insertions, 0 deletions
diff --git a/src/vm/clrtocomcall.h b/src/vm/clrtocomcall.h
new file mode 100644
index 0000000000..6c25948ab4
--- /dev/null
+++ b/src/vm/clrtocomcall.h
@@ -0,0 +1,74 @@
+// 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.
+// 
+// File: CLRtoCOMCall.h 
+//
+
+// 
+// Used to handle stub creation for managed to unmanaged transitions.
+// 
+
+
+#ifndef __COMPLUSCALL_H__
+#define __COMPLUSCALL_H__
+
+#ifndef FEATURE_COMINTEROP
+#error FEATURE_COMINTEROP is required for this file
+#endif // FEATURE_COMINTEROP
+
+#include "util.hpp"
+
+class ComPlusCall
+{
+    public:
+        //---------------------------------------------------------
+        // Debugger helper function
+        //---------------------------------------------------------
+        static TADDR GetFrameCallIP(FramedMethodFrame *frame);
+
+        static MethodDesc* GetILStubMethodDesc(MethodDesc* pMD, DWORD dwStubFlags);
+        static PCODE       GetStubForILStub(MethodDesc* pMD, MethodDesc** ppStubMD);
+
+        static ComPlusCallInfo *PopulateComPlusCallMethodDesc(MethodDesc* pMD, DWORD* pdwStubFlags);
+        static MethodDesc *GetWinRTFactoryMethodForCtor(MethodDesc *pMDCtor, BOOL *pComposition);
+        static MethodDesc *GetWinRTFactoryMethodForStatic(MethodDesc *pMDStatic);
+
+#ifdef _TARGET_X86_
+        static void Init();
+        static LPVOID GetRetThunk(UINT numStackBytes);
+#endif // _TARGET_X86_
+    private:
+        ComPlusCall();     // prevent "new"'s on this class
+
+#ifdef _TARGET_X86_
+    struct RetThunkCacheElement
+    {
+        RetThunkCacheElement()
+        {
+            LIMITED_METHOD_CONTRACT;
+            m_cbStack = 0;
+            m_pRetThunk = NULL;
+        }
+
+        UINT m_cbStack;
+        LPVOID m_pRetThunk;
+    };
+
+    class RetThunkSHashTraits : public NoRemoveSHashTraits< DefaultSHashTraits<RetThunkCacheElement> >
+    {
+    public:
+        typedef UINT key_t;
+        static key_t GetKey(element_t e)       { LIMITED_METHOD_CONTRACT; return e.m_cbStack; }
+        static BOOL Equals(key_t k1, key_t k2) { LIMITED_METHOD_CONTRACT; return (k1 == k2); }
+        static count_t Hash(key_t k)           { LIMITED_METHOD_CONTRACT; return (count_t)(size_t)k; }
+        static const element_t Null()          { LIMITED_METHOD_CONTRACT; return RetThunkCacheElement(); }
+        static bool IsNull(const element_t &e) { LIMITED_METHOD_CONTRACT; return (e.m_pRetThunk == NULL); }
+    };
+
+    static SHash<RetThunkSHashTraits> *s_pRetThunkCache;
+    static CrstStatic s_RetThunkCacheCrst;
+#endif // _TARGET_X86_
+};
+
+#endif // __COMPLUSCALL_H__