Feature/shared library refactor (#712)

* * Added ISlangSharedLibraryLoader and ISlangSharedLibrary
* Implemented default implementations
* Added slang API function to get/set the ISlangSharedLibraryLoader on the session
* Put function caching onto the Session - so that if the loader is chaged, its easy to reset the shared libraries, and functions

* Run premake.

* Fix problem with setting null, would cause an unnecessary function/shared lib flush.

* * Unload SharedLibrary when DefaultSharedLibrary is deleted.
* Make SharedLibrary handle unload safely if already unloaded.

* Refactor SharedLibrary, such that it becomes a utility class - simplifying it's semantics.

* Simplified ISlangSharedLibrary such that doesn't have unload and isLoaded so easier to implement.
Use updated SharedLibrary impl.

* Disable aarch64 on windows

* Premake windows files without aarch64 build.

* Moved slang-shared-library to core (so can be used in code outside of main slang)
Fixed problem in premake5 where on windows projects were incorrectly constructed

* Allowed RefObject to base class of com types
Added ConfigurableSharedLibraryLoader
Added -dxc-path -fxc-path -glslang-path
Fix problem with dxc-path not honoring it's path when loading dxil

* Added documentation for command line control of dll loading paths.

* Remove some tabbing issues.

* Change name of include guard.

1 files changed, 2 insertions, 9 deletions

diff --git a/source/core/slang-string-util.h b/source/core/slang-string-util.h
index 47d92f2fe..b365b6cf5 100644
--- a/source/core/slang-string-util.h
+++ b/source/core/slang-string-util.h
@@ -13,11 +13,11 @@ namespace Slang {
 
 /** A blob that uses a `String` for its storage.
 */
-class StringBlob : public ISlangBlob
+class StringBlob : public ISlangBlob, public RefObject
 {
 public:
     // ISlangUnknown
-    SLANG_IUNKNOWN_ALL
+    SLANG_REF_OBJECT_IUNKNOWN_ALL
 
         // ISlangBlob
     SLANG_NO_THROW void const* SLANG_MCALL getBufferPointer() SLANG_OVERRIDE { return m_string.Buffer(); }
@@ -30,15 +30,9 @@ public:
         : m_string(string)
     {}
 
-    /// Need virtual dtor, because BlobBase is derived from and release impl used is the one in the base class (that doesn't know the derived type)
-    /// Alternatively could be implemented by always using SLANG_IUNKNOWN_RELEASE in derived types - this would make derived types slightly smaller/faster
-    virtual ~StringBlob() {}
-
 protected:
     ISlangUnknown* getInterface(const Guid& guid);
-
     String m_string;
-    uint32_t m_refCount = 0;
 };
 
 struct StringUtil
@@ -62,7 +56,6 @@ struct StringUtil
 
         /// Create a blob from a string
     static ComPtr<ISlangBlob> createStringBlob(const String& string);
-
 };
 
 } // namespace Slang