IDownstreamCompiler interface (#2361)

* WIP with hierarchical enums.

* Some small fixes and improvements around artifact desc related types.

* Improvements around hierarchical enum.

* Fixes to get Artifact types refactor to be able to execute tests.

* Attempt to better categorize PTX.

* Work around for potentially unused function warning.

* Typo fix.

* Simplify Artifact header.

* Small improvements around Artifact kind/payload/style.

* Added IDestroyable/ICastable

* Add IArtifactList.

* First impl of IArtifactUtil.

* Use the ICastable interface for IArtifactRepresentation.

* Added IArtifactRepresentation & IArtifactAssociated.

* Add SLANG_OVERRIDE to avoid gcc/clang warning.

* Fix calling convention issue on win32.

* Fix missing SLANG_OVERRIDE.

* First attempt at file abstraction around Artifact.

* Added creation of lock file.

* Move functionality for determining file paths to the IArtifactUtil.
Add casting to ICastable.

* Added some casting/finding mechanisms.

* Simplify IArtifact interface, and use Items for file reps.

* Fix problem with libraries on DXIL.

* Split out ArtifactRepresentation.

* Move ArtifactDesc functionality to ArtifactDescUtil. ArtifactInfoUtil becomes ArtifactDescUtil.

* Split implementations from the interfaces for Artifact.

* Use TypeTextUtil for target name outputting.

* Add artifact impls.

* Add ICastableList

* Added UnknownCastableAdapter

* Make ISlangSharedLibrary derive from ICastable, and remain backwards compatible with slang-llvm.

* Refactor Representation on Artifact.

* Make our ISlangBlobs also derive from ICastable.
Make ISlangBlob atomic ref counted.

* Split out CastableList and related types, and placed in core.

* Small fixes around IArtifact.
Improve IArtifact docs.
First impl of getChildren for IArtifact.

* Documentation improvements for Artifact related types.

* Fix typo.

* Special case adding a ICastableList to a LazyCastableList.

* Small simplification of LazyCastableList, by adding State member.

* Removed the ILockFile interface because IFileArtifactRepresentation can be used.

* Implement DiagnosticsArtifactRepresentation.

* Added PostEmitMetadataArtifactRepresentation

* Add searching by predicate.
Added handling of accessing Artifact as ISharedLibrary

* Fix typo.

* Add find to IArtifacgtList.
Fix some missing SLANG_NO_THROW.

* Small improvements around ArtifactDesc types.

* Another small change around ArtifactKind.

* Some more shuffling of ArtifactDesc.

* Make IArtifact castable
Remove IArtifactList
Made IArtifactContainer derive from IArtifact
Made ModuleLibrary atomic ref counted/given IModuleLibrary interface.

* Must call _requireChildren before any children access.

* Fix missing SLANG_MCALL on castAs.

* Fix missing SLANG_OVERRIDE.

* Added IArtifactHandler

* Use ICastable for basis of scope/lookup.

* WIP first attempt to remove CompileResult.

* Fix support for for downstream compiler shared library adapter.

* Fix issues found when replacing CompileResult.

* Fix typo.

* Fix getting items form 'significant' member of an Artifact.

* Split out ArtifactUtil & ArtifactHandler.

* Work around for problem on Visual studio.

* Improve searching.

* Add missing files.

* Split out Artifact associated types.
Don't produce a container by default - use associated for 'metadata'.

* Remove no longer used ArtifactPayload type.

* Generalized converting representations.
Small improvements to artifacts.

* Fix intermediate dumping issue.

* Removed #if 0 out CompileResult.
Remove DownstreamCompileResult maybeDumpIntermediate.

* Pull out functionality for dumping artifact output into ArtifactOutputUtil
Fixed a bug in naming files based on ArtifactDesc.

* std::atomic issue.

* Pull out types from DownstreamCompile to simplify moving to an interface.

* Fix typo.

* Use IDownstreamCompiler interface.
Split out DownstreamCompilerUtil and DownstreamCompilerSet.

* Update projects.

* Fix missing SLANG_MCALL.

* Fix calling convention of IDownstreamCompiler impls.

* Split out binary work arounds into a dep1.cpp/h

* Small reorganising around DownstreamCompilerInfo.

* Remove Desc library functionality to DownstreamCompilerUtil.

* Expand IDiagnostics interface.
Rename associated impls with Impl suffix.

* Fix outputting as text bug.
Some small improvements.

* Add fix around prefix for dumping.
Improved how handling for extensions work form ArtifactDesc.

* Dump assembly if available.

* Simplify some of Dep1 definitions.

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;
+}
+
+}