Make ISlangFileSystem derive from ICastable (#2386)

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

* Make ISlangFileSystem derive from ICastable.

* Make ArchiveFileSystem into an interface
Make file systems atomically reference counted.

* Small fix.

* Some small fixes to work around issues of ICastable on ISlangFileSystem

* Use ISlangFileSystem derived type instead of IArchiveFileSystem. Can always get other interface with castAs.

* Some small fixes around change of interface returned from archive type functions.

* Remove CacheFileSystem member from linkage. Can access easily from m_fileSystemExt if necessary with as cast.

* Fix RiffFileSystem casting issue.

* Add a check around CacheFileSystem.

1 files changed, 3 insertions, 3 deletions

diff --git a/source/slang/slang-api.cpp b/source/slang/slang-api.cpp
index 50986660b..a3b1e5409 100644
--- a/source/slang/slang-api.cpp
+++ b/source/slang/slang-api.cpp
@@ -831,10 +831,10 @@ SLANG_API SlangResult spLoadReproAsFileSystem(
     MemoryOffsetBase base;
     base.set(buffer.getBuffer(), buffer.getCount());
 
-    RefPtr<CacheFileSystem> cacheFileSystem;
-    SLANG_RETURN_ON_FAIL(ReproUtil::loadFileSystem(base, requestState, replaceFileSystem, cacheFileSystem));
+    ComPtr<ISlangFileSystemExt> fileSystem;
+    SLANG_RETURN_ON_FAIL(ReproUtil::loadFileSystem(base, requestState, replaceFileSystem, fileSystem));
 
-    *outFileSystem = cacheFileSystem.detach();
+    *outFileSystem = fileSystem.detach();
     return SLANG_OK;
 }