From be8497804f803c02cfab1aa2c54d921042e90ec9 Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Thu, 1 Sep 2022 15:38:17 -0400
Subject: Remove artifact from SourceFile (#2384)

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

* Make DownstreamCompileOptions use POD types.

* CharSliceAllocator -> SliceAllocator
Added SliceConverter
CharSliceCaster -> SliceCaster

* First attempt at zero terminating around blobs.

* Fix clang warning.

* Add SlangTerminatedChars
Make Blob implementations support it.
Make most blobs 'terminated'.

* Fix bug setting up sourceFiles for CommandLineDownstreamCompiler.

* Traffic in TerminatedCharSlice for sourceFiles.
Use ArtifactDesc to generate temporary file names for source.

* Fix typo in testing for shared library/C++.

* Working with source being passed as artifacts to DownstreamCompiler.

* Use artifacts in SourceManager/SourceFile.

* Support infering extension from the original file extension.

* * Infer extension if can't determine from the artifact type
* Split IOSFile/IExtFile representations
* Move responsibility for creating OS file to the handler.

* Disable the check memory path.

* Remove artifact from SourceFile.
Lazily generate SourceFile from artifacts as needed.

* Fix some small bugs.

* Remove maybeAddArtifact.

* Load artifacts if repro capture is enabled.

* Remove adding by string, because doing so means source will be allocated twice or there is a potential race around ref counting to the contained String.

* Add built in source as a blob.

* Fix warning.

* Make StringBlob own the contents if moved.
Fix some compilation issues.

* Share StringBlob uniqueness code.

* Do move unique on Ctor.

* Change MoveUnique to not have any values.

* MoveUnique can more sensibly be a struct.

Co-authored-by: Yong He <yonghe@outlook.com>
---
 source/core/slang-blob.cpp | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

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

diff --git a/source/core/slang-blob.cpp b/source/core/slang-blob.cpp
index 6cf5214cc..a4acb98cb 100644
--- a/source/core/slang-blob.cpp
+++ b/source/core/slang-blob.cpp
@@ -35,6 +35,25 @@ void* BlobBase::castAs(const SlangUUID& guid)
 
 /* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! StringBlob !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
 
+StringBlob::StringBlob(MoveUnique, String& in)
+{
+    auto rep = in.getStringRepresentation();
+    if (rep && !rep->isUniquelyReferenced())
+    {
+        // Make a new unique copy
+        m_string = in.getUnownedSlice();
+
+        // Move out of in
+        String tmp;
+        tmp.swapWith(in);
+    }
+    else
+    {
+        // Must either not have a rep or be unique
+        m_string.swapWith(in);
+    }
+}
+
 void* StringBlob::castAs(const SlangUUID& guid)
 {
     if (auto intf = getInterface(guid))
@@ -59,6 +78,16 @@ void* StringBlob::getObject(const Guid& guid)
     return nullptr;
 }
 
+/* static */ComPtr<ISlangBlob> StringBlob::moveCreate(String& in)
+{
+    return ComPtr<ISlangBlob>(new StringBlob(MoveUnique{}, in));
+}
+
+/* static */ComPtr<ISlangBlob> StringBlob::moveCreate(String&& in)
+{
+    return ComPtr<ISlangBlob>(new StringBlob(MoveUnique{}, in));
+}
+
 /* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! RawBlob !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! */
 
 void* RawBlob::castAs(const SlangUUID& guid)
-- 
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