Callable CPU code support (#1014)

* First pass support for compiling to a loaded shared library.

* Improve documentation for cpu target.

* Removed the SLANG_COMPILE_FLAG_LOAD_SHARED_LIBRARY flag.
Use the SLANG_HOST_CALLABLE code target
Document mechanism.

* Fix typo in cpp-resource.slang
In test code if the target is 'callable' we don't need to compile (indeed there is no source file).

* Small refactor using CommandLineCPPCompiler as base class to implement VisualStudioCPPCompiler and GCCCPPCompiler.

* Improvements around CPPCompiler.
Mechanism to know products produced.
Cleaning up products after execution.

* Fix multiple definition of 'SourceType'

1 files changed, 26 insertions, 0 deletions

diff --git a/slang.h b/slang.h
index 281aeba6a..474ea9916 100644
--- a/slang.h
+++ b/slang.h
@@ -516,6 +516,7 @@ extern "C"
         SLANG_CPP_SOURCE,           ///< The C++ language
         SLANG_EXECUTABLE,           ///< Executable (for hosting CPU/OS)
         SLANG_SHARED_LIBRARY,       ///< A shared library/Dll (for hosting CPU/OS)
+        SLANG_HOST_CALLABLE,        ///< A CPU target that makes the compiled code available to be run immediately
     };
 
     /* A "container format" describes the way that the outputs
@@ -1210,6 +1211,8 @@ extern "C"
         int                     targetIndex,
         SlangTargetFlags        flags);
 
+
+
     /*!
     @brief Set the floating point mode (e.g., precise or fast) to use a target.
     */
@@ -1547,6 +1550,7 @@ extern "C"
 
     /** Get the output code associated with a specific entry point.
 
+    @param request   The request 
     @param entryPointIndex The index of the entry point to get code for.
     @param targetIndex The index of the target to get code for (default: zero).
     @param outBlob A pointer that will receive the blob of code
@@ -1560,14 +1564,36 @@ extern "C"
         int                     targetIndex,
         ISlangBlob**            outBlob);
 
+    /** Get entry point 'callable' functions accessible through the ISlangSharedLibrary interface.
+
+    That the functions remain in scope as long as the ISlangSharedLibrary interface is in scope.
+
+    NOTE! Requires a compilation target of SLANG_HOST_CALLABLE.
+    
+    @param request          The request 
+    @param entryPointIndex  The index of the entry point to get code for.
+    @param targetIndex      The index of the target to get code for (default: zero).
+    @param outSharedLibrary A pointer to a ISharedLibrary interface which functions can be queried on.
+    @returns                A `SlangResult` to indicate success or failure.
+    */
+    SLANG_API SlangResult spGetEntryPointHostCallable(
+        SlangCompileRequest*    request,
+        int                     entryPointIndex,
+        int                     targetIndex,
+        ISlangSharedLibrary**   outSharedLibrary);
+
     /** Get the output bytecode associated with an entire compile request.
 
     The lifetime of the output pointer is the same as `request`.
+
+    DEPRECIATED: No longer outputs anything. 
     */
     SLANG_API void const* spGetCompileRequestCode(
         SlangCompileRequest*    request,
         size_t*                 outSize);
 
+
+
     /*
     Forward declarations of types used in the reflection interface;
     */