From 4337338ed2d9525b4638f32c6b91ef61b69e41cd Mon Sep 17 00:00:00 2001
From: jsmall-nvidia <jsmall@nvidia.com>
Date: Thu, 10 Dec 2020 14:04:29 -0500
Subject: Building with embedded stdlib (#1634)

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

* Move reflection to reflection-api.

* Slight reorg to pull out potentially Slang internal functions from the reflection API impls.

* Remove visual studio projects

* Fix for slang-binaries copy.

* Add the visual studio projects in build/visual-studio

* Remove miniz project.

* Differentiate the linePath from the filePath.

* Improve comment in premake5.lua + to kick of CI.

* Kick CI.

* Use COM compile request for calls to functions inside api-less-slang.
Add static-slang project.

* Fix const typo issue.

* Don't include 'core' link in 'api-less-slang'

* Removed static-slang lib causes problems on linux with linking.
Embed Slang stdlib
Added StaticBlob
Added dumpSourceBytes
Use ConstArrayView for the archive.
At startup allow loading of zip with stdlib.
Made -save-stdlib -load-stdlib take a name
Added '-save-stdlib-bin-source' to save out serialized stdlib as source.

* Ability enable/disable stdlib embedding.

* Fix problem with moduleDecl not having module pointer set when serialized in.

* Set of debugdir for slang-test and examples.

* Add slang-stdlib-api.cpp

* Update slang filters for VS.

* Try to use pic, and -mcmodel=medium

* Some more efforts ot make premake work.

* WIP premake5.lua from previously working version.

* Remove api-less-slang project.

* Disable dllexport on gcc/clang.

* Embed via slangc-bootstrap.

* Fix slang-profile. Always compiles without stdlib.

* Use pic "On"

* Remove slangc-bootstrap and embed-stdlib-generator if embedding not required. Make bootstrap run the generators.

* Improve comments in premake5.lua.
Kick off another CI build.

* Remove generation of stdlib source from std-lib-serialize.slang
---
 source/core/slang-blob.h | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

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

diff --git a/source/core/slang-blob.h b/source/core/slang-blob.h
index d326f9c9c..c98c41563 100644
--- a/source/core/slang-blob.h
+++ b/source/core/slang-blob.h
@@ -26,6 +26,7 @@ protected:
 };
 
 /** A blob that uses a `String` for its storage.
+NOTE! Returns length *WITHOUT* terminating 0, even though there is one.
 */
 class StringBlob : public BlobBase
 {
@@ -191,6 +192,34 @@ protected:
 
 };
 
+/** A Blob that has no ref counting and exists typically for entire execution.
+The memory it references is *not* owned by the blob.
+This is useful when a Blob is useful to represent some global immutable chunk of memory.
+*/
+class StaticBlob : public ISlangBlob
+{
+public:
+
+    // ISlangUnknown
+    SLANG_NO_THROW SlangResult SLANG_MCALL queryInterface(SlangUUID const& uuid, void** outObject) SLANG_OVERRIDE;
+    SLANG_NO_THROW uint32_t SLANG_MCALL addRef() SLANG_OVERRIDE { return 1; }
+    SLANG_NO_THROW uint32_t SLANG_MCALL release() SLANG_OVERRIDE { return 1; }
+
+    // ISlangBlob
+    SLANG_NO_THROW void const* SLANG_MCALL getBufferPointer() SLANG_OVERRIDE { return m_data; }
+    SLANG_NO_THROW size_t SLANG_MCALL getBufferSize() SLANG_OVERRIDE { return m_dataCount; }
+
+    StaticBlob(const void* data, size_t dataCount):
+        m_data(data),
+        m_dataCount(dataCount)
+    {
+    }
+
+protected:
+    const void* m_data;
+    size_t m_dataCount;
+};
+
 /// Create a blob that will retain (a copy of) raw data.
 ///
 inline ComPtr<ISlangBlob> createRawBlob(void const* inData, size_t size)
-- 
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