1 files changed, 75 insertions, 0 deletions
diff --git a/source/compiler-core/slang-downstream-dep1.cpp b/source/compiler-core/slang-downstream-dep1.cpp
new file mode 100644
index 000000000..e5eb4ac24
--- /dev/null
+++ b/source/compiler-core/slang-downstream-dep1.cpp
@@ -0,0 +1,75 @@
+// slang-downstream-dep1.cpp
+#include "slang-downstream-dep1.h"
+
+
+namespace Slang
+{
+
+// A temporary class that adapts `ISlangSharedLibrary_Dep1` to ISlangSharedLibrary
+class SharedLibraryDep1Adapter : public ComBaseObject, public ISlangSharedLibrary
+{
+public:
+    SLANG_COM_BASE_IUNKNOWN_ALL
+
+    // ICastable
+    virtual SLANG_NO_THROW void* SLANG_MCALL castAs(const SlangUUID& guid) SLANG_OVERRIDE;
+
+    // ISlangSharedLibrary
+    virtual SLANG_NO_THROW void* SLANG_MCALL findSymbolAddressByName(char const* name) SLANG_OVERRIDE { return m_contained->findSymbolAddressByName(name); }
+
+    SharedLibraryDep1Adapter(ISlangSharedLibrary_Dep1* dep1) :
+        m_contained(dep1)
+    {
+    }
+
+protected:
+    void* getInterface(const Guid& guid)
+    {
+        if (guid == ISlangUnknown::getTypeGuid() ||
+            guid == ICastable::getTypeGuid() ||
+            guid == ISlangSharedLibrary::getTypeGuid())
+        {
+            return static_cast<ISlangSharedLibrary*>(this);
+        }
+        return nullptr;
+    }
+    void* getObject(const Guid& guid)
+    {
+        SLANG_UNUSED(guid);
+        return nullptr;
+    }
+
+    ComPtr<ISlangSharedLibrary_Dep1> m_contained;
+};
+
+void* SharedLibraryDep1Adapter::castAs(const SlangUUID& guid)
+{
+	if (auto intf = getInterface(guid))
+	{
+		return intf;
+	}
+	return getObject(guid);
+}
+
+/* Hack to take into account downstream compilers shared library interface might need an adapter */
+/* static */SlangResult DownstreamUtil_Dep1::getDownstreamSharedLibrary(DownstreamCompileResult* downstreamResult, ComPtr<ISlangSharedLibrary>& outSharedLibrary)
+{
+	ComPtr<ISlangSharedLibrary> lib;
+	SLANG_RETURN_ON_FAIL(downstreamResult->getHostCallableSharedLibrary(lib));
+
+	if (SLANG_SUCCEEDED(lib->queryInterface(ISlangSharedLibrary::getTypeGuid(), (void**)outSharedLibrary.writeRef())))
+	{
+		return SLANG_OK;
+	}
+
+	ComPtr<ISlangSharedLibrary_Dep1> libDep1;
+	if (SLANG_SUCCEEDED(lib->queryInterface(ISlangSharedLibrary_Dep1::getTypeGuid(), (void**)libDep1.writeRef())))
+	{
+		// Okay, we need to adapt for now
+		outSharedLibrary = new SharedLibraryDep1Adapter(libDep1);
+		return SLANG_OK;
+	}
+	return SLANG_E_NOT_FOUND;
+}
+
+}