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SBHostOS implements a threading framework that allows creating and manipulating
OS threads in the current process.

We usually don't deprecate SB APIs, but in this case I think it makes sense 
because:

- The framework is not implemented on all platforms (i.e. Windows and *BSD 
support seems to be incomplete)
- `ThreadCreated` is completely unimplemented..
- It hasn't been touched since the original check-in of the source code.
- I don't think it can even be used via the Python bindings as `ThreadCreate` 
seems impossible to call (it takes a function pointer and returns a OS specific 
struct).
- It's not tested.
- It's to my knowledge not used by Xcode or anyone that has their source code 
indexed by Google.
- It's the only reason why we (partially) implement a bunch of internal 
threading utilities in LLDB (which I'll remove in a follow-up patch).

I would propose deprecating it with the upcoming LLDB 13 release (which will be 
branched in about a month).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D104231

Files:
  lldb/bindings/interface/SBHostOS.i
  lldb/include/lldb/API/SBHostOS.h


Index: lldb/include/lldb/API/SBHostOS.h
===================================================================
--- lldb/include/lldb/API/SBHostOS.h
+++ lldb/include/lldb/API/SBHostOS.h
@@ -24,15 +24,21 @@
 
   static lldb::SBFileSpec GetUserHomeDirectory();
 
-  static void ThreadCreated(const char *name);
+  /// \deprecated Deprecated since LLDB version 13.
+  static void ThreadCreated(const char *name) LLDB_API_IMPL_DEPRECATED;
 
+  /// \deprecated Deprecated since LLDB version 13.
   static lldb::thread_t ThreadCreate(const char *name,
                                      lldb::thread_func_t thread_function,
                                      void *thread_arg, lldb::SBError *err);
 
+  /// \deprecated Deprecated since LLDB version 13.
   static bool ThreadCancel(lldb::thread_t thread, lldb::SBError *err);
 
+  /// \deprecated Deprecated since LLDB version 13.
   static bool ThreadDetach(lldb::thread_t thread, lldb::SBError *err);
+
+  /// \deprecated Deprecated since LLDB version 13.
   static bool ThreadJoin(lldb::thread_t thread, lldb::thread_result_t *result,
                          lldb::SBError *err);
 
Index: lldb/bindings/interface/SBHostOS.i
===================================================================
--- lldb/bindings/interface/SBHostOS.i
+++ lldb/bindings/interface/SBHostOS.i
@@ -27,22 +27,29 @@
     static lldb::SBFileSpec
     GetUserHomeDirectory ();
 
+
+    %feature("docstring", " .. deprecated:: 13 ") ThreadCreated;
     static void
     ThreadCreated (const char *name);
 
+    %feature("docstring", " .. deprecated:: 13 ") ThreadCreate;
     static lldb::thread_t
     ThreadCreate (const char *name,
                   lldb::thread_func_t,
                   void *thread_arg,
                   lldb::SBError *err);
 
+    %feature("docstring", " .. deprecated:: 13 ") ThreadCancel;
     static bool
     ThreadCancel (lldb::thread_t thread,
                   lldb::SBError *err);
 
+    %feature("docstring", " .. deprecated:: 13 ") ThreadDetach;
     static bool
     ThreadDetach (lldb::thread_t thread,
                   lldb::SBError *err);
+
+    %feature("docstring", " .. deprecated:: 13 ") ThreadJoin;
     static bool
     ThreadJoin (lldb::thread_t thread,
                 lldb::thread_result_t *result,


Index: lldb/include/lldb/API/SBHostOS.h
===================================================================
--- lldb/include/lldb/API/SBHostOS.h
+++ lldb/include/lldb/API/SBHostOS.h
@@ -24,15 +24,21 @@
 
   static lldb::SBFileSpec GetUserHomeDirectory();
 
-  static void ThreadCreated(const char *name);
+  /// \deprecated Deprecated since LLDB version 13.
+  static void ThreadCreated(const char *name) LLDB_API_IMPL_DEPRECATED;
 
+  /// \deprecated Deprecated since LLDB version 13.
   static lldb::thread_t ThreadCreate(const char *name,
                                      lldb::thread_func_t thread_function,
                                      void *thread_arg, lldb::SBError *err);
 
+  /// \deprecated Deprecated since LLDB version 13.
   static bool ThreadCancel(lldb::thread_t thread, lldb::SBError *err);
 
+  /// \deprecated Deprecated since LLDB version 13.
   static bool ThreadDetach(lldb::thread_t thread, lldb::SBError *err);
+
+  /// \deprecated Deprecated since LLDB version 13.
   static bool ThreadJoin(lldb::thread_t thread, lldb::thread_result_t *result,
                          lldb::SBError *err);
 
Index: lldb/bindings/interface/SBHostOS.i
===================================================================
--- lldb/bindings/interface/SBHostOS.i
+++ lldb/bindings/interface/SBHostOS.i
@@ -27,22 +27,29 @@
     static lldb::SBFileSpec
     GetUserHomeDirectory ();
 
+
+    %feature("docstring", " .. deprecated:: 13 ") ThreadCreated;
     static void
     ThreadCreated (const char *name);
 
+    %feature("docstring", " .. deprecated:: 13 ") ThreadCreate;
     static lldb::thread_t
     ThreadCreate (const char *name,
                   lldb::thread_func_t,
                   void *thread_arg,
                   lldb::SBError *err);
 
+    %feature("docstring", " .. deprecated:: 13 ") ThreadCancel;
     static bool
     ThreadCancel (lldb::thread_t thread,
                   lldb::SBError *err);
 
+    %feature("docstring", " .. deprecated:: 13 ") ThreadDetach;
     static bool
     ThreadDetach (lldb::thread_t thread,
                   lldb::SBError *err);
+
+    %feature("docstring", " .. deprecated:: 13 ") ThreadJoin;
     static bool
     ThreadJoin (lldb::thread_t thread,
                 lldb::thread_result_t *result,
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