Artifact and ICastable (#2351)

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

* 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.

* Fix typo.

1 files changed, 29 insertions, 17 deletions

diff --git a/source/core/slang-shared-library.cpp b/source/core/slang-shared-library.cpp
index 6ce10ad9e..0e4f0ee73 100644
--- a/source/core/slang-shared-library.cpp
+++ b/source/core/slang-shared-library.cpp
@@ -62,7 +62,7 @@ SlangResult DefaultSharedLibraryLoader::loadPlatformSharedLibrary(const char* pa
     }
 }
 
-/* !!!!!!!!!!!!!!!!!!!!!!!!!! DefaultSharedLibrary !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
+/* !!!!!!!!!!!!!!!!!!!!!!!!!! TemporarySharedLibrary !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
 
 TemporarySharedLibrary::~TemporarySharedLibrary()
 {
@@ -76,38 +76,50 @@ TemporarySharedLibrary::~TemporarySharedLibrary()
 
 /* !!!!!!!!!!!!!!!!!!!!!!!!!! DefaultSharedLibrary !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
 
-SLANG_NO_THROW SlangResult SLANG_MCALL DefaultSharedLibrary::queryInterface(SlangUUID const& uuid, void** outObject)
+DefaultSharedLibrary::~DefaultSharedLibrary()
 {
-    // Mechanism to cast to underlying type. 
-    // NOTE! Purposefully does not ref count
-    if (uuid == DefaultSharedLibrary::getTypeGuid())
+    if (m_sharedLibraryHandle)
     {
-        *outObject = this;
-        return SLANG_OK;
+        SharedLibrary::unload(m_sharedLibraryHandle);
     }
+}
+
+void* DefaultSharedLibrary::findSymbolAddressByName(char const* name)
+{
+    return SharedLibrary::findSymbolAddressByName(m_sharedLibraryHandle, name);
+}
 
-    if (uuid == ISlangUnknown::getTypeGuid() || uuid == ISlangSharedLibrary::getTypeGuid()) 
+void* DefaultSharedLibrary::castAs(const SlangUUID& guid)
+{
+    if (auto intf = getInterface(guid))
     {
-        ++m_refCount;
-        *outObject = static_cast<ISlangSharedLibrary*>(this);
-        return SLANG_OK;
+        return intf;
     }
-    return SLANG_E_NO_INTERFACE;
+    return getObject(guid);
 }
 
-DefaultSharedLibrary::~DefaultSharedLibrary()
+void* DefaultSharedLibrary::getInterface(const Guid& guid)
 {
-    if (m_sharedLibraryHandle)
+    if (guid == ISlangUnknown::getTypeGuid() ||
+        guid == ICastable::getTypeGuid() ||
+        guid == ISlangSharedLibrary::getTypeGuid())
     {
-        SharedLibrary::unload(m_sharedLibraryHandle);
+        return static_cast<ISlangSharedLibrary*>(this);
     }
+    return nullptr;
 }
 
-void* DefaultSharedLibrary::findSymbolAddressByName(char const* name)
+void* DefaultSharedLibrary::getObject(const Guid& guid)
 {
-    return SharedLibrary::findSymbolAddressByName(m_sharedLibraryHandle, name);
+    if (guid == DefaultSharedLibrary::getTypeGuid())
+    {
+        return this;
+    }
+    return nullptr;
 }
 
+/* !!!!!!!!!!!!!!!!!!!!!!!!!! SharedLibraryUtils !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!*/
+
 String SharedLibraryUtils::getSharedLibraryFileName(void* symbolInLib)
 {
 #if defined(_WIN32)