From 6ab0baf910dea838dca2d29557c3361297180a34 Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Mon, 22 Aug 2022 17:39:56 -0400
Subject: Improve binary compatibility for DownstreamCompiler types (#2371)

* #include an absolute path didn't work - because paths were taken to always be relative.

* WIP replacing DownstreamCompileResult.

* First attempt at replacing DownstreamCompileResult with IArtifact and associated types.

* Small renaming around CharSlice.

* ICastable -> ISlangCastable
Added IClonable
Fix issue with cloning in ArtifactDiagnostics.

* Only add the blob if one is defined in DXC.

* Guard adding blob representation.

* Make cloneInterface available across code base.
Set enums backing type for ArtifactDiagnostic.

* Added ::create for ArtifactDiagnostics.

* Use SemanticVersion for DownstreamCompilerDesc.
Set sizes for enum types.

* Depreciate old incompatible CompileOptions.
Change SemanticVersion use 32 bits for the patch.

* Split out CastableUtil.

* Change IDownstreamCompiler to use canConvert and convert to use artifact types.

* Fix typos.

* Fix typo bug.
Allow trafficing in PTX assembly/binaries

* struct DownstreamCompilerBaseUtil -> struct DownstreamCompilerUtilBase

Co-authored-by: Yong He <yonghe@outlook.com>
---
 source/core/slang-castable-util.cpp | 70 +++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 source/core/slang-castable-util.cpp

(limited to 'source/core/slang-castable-util.cpp')

diff --git a/source/core/slang-castable-util.cpp b/source/core/slang-castable-util.cpp
new file mode 100644
index 000000000..408e36cb3
--- /dev/null
+++ b/source/core/slang-castable-util.cpp
@@ -0,0 +1,70 @@
+// slang-castable-util.cpp
+#include "slang-castable-util.h"
+
+namespace Slang {
+
+/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! CastableUtil !!!!!!!!!!!!!!!!!!!!!!!!!!! */
+
+/* static */ComPtr<ICastable> CastableUtil::getCastable(ISlangUnknown* unk)
+{
+    SLANG_ASSERT(unk);
+    ComPtr<ICastable> castable;
+    if (SLANG_SUCCEEDED(unk->queryInterface(ICastable::getTypeGuid(), (void**)castable.writeRef())))
+    {
+        SLANG_ASSERT(castable);
+    }
+    else
+    {
+        castable = new UnknownCastableAdapter(unk);
+    }
+    return castable;
+}
+
+/* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! UnknownCastableAdapter !!!!!!!!!!!!!!!!!!!!!!!!!!! */
+
+void* UnknownCastableAdapter::castAs(const Guid& guid)
+{
+    if (auto intf = getInterface(guid))
+    {
+        return intf;
+    }
+    if (auto obj = getObject(guid))
+    {
+        return obj;
+    }
+
+    if (m_found && guid == m_foundGuid)
+    {
+        return m_found;
+    }
+
+    ComPtr<ISlangUnknown> cast;
+    if (SLANG_SUCCEEDED(m_contained->queryInterface(guid, (void**)cast.writeRef())) && cast)
+    {
+        // Save the interface in the cache
+        m_found = cast;
+        m_foundGuid = guid;
+
+        return cast;
+    }
+    return nullptr;
+}
+
+void* UnknownCastableAdapter::getInterface(const Guid& guid)
+{
+    if (guid == ISlangUnknown::getTypeGuid() ||
+        guid == ICastable::getTypeGuid() ||
+        guid == IUnknownCastableAdapter::getTypeGuid())
+    {
+        return static_cast<IUnknownCastableAdapter*>(this);
+    }
+    return nullptr;
+}
+
+void* UnknownCastableAdapter::getObject(const Guid& guid)
+{
+    SLANG_UNUSED(guid);
+    return nullptr;
+}
+
+} // namespace Slang
-- 
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