Made ThreadX object names const-qualifiable behind an option (#761)

Fixes #61

Object names are exposed as writable pointers throughout the kernel API, which
rejects string literals in C++ and lets a caller modify a name an object still
holds. Information services return those names through writable double
pointers.

Create services, control blocks, information services, the module manager and
trace registration now preserve const qualification, behind
TX_ENABLE_CONST_NAMES. The option defaults to off, so a build that says nothing
gets exactly the types it got before. It is opt-in rather than opt-out because
it changes the type of a public struct field: application code that copies a
name into a writable CHAR * stops compiling, which is a reasonable thing to ask
of a minor release and not of a patch one. Issue #780 tracks making it the
default in 6.6.

Two things the option reaches that its own call sites do not.
TX_CHAR_TO_UCHAR_POINTER_CONVERT has exactly two users, both of them reading an
object name in _tx_trace_object_register, and every form of that macro but the
MISRA one casts the qualifier away without saying so; the conversion is now
const in and const out, so nothing launders const to make the build pass. The
FreeRTOS adapter holds the name pcTaskGetName retrieves in a TX_NAME_CONST
pointer so that it tracks whichever declaration tx_thread_info_get has, and
keeps its writable return type through an explicit MISRA C:2012 Rule 11.8 cast,
because that signature is part of the FreeRTOS API.

Default build: all seven host configurations and all five SMP configurations
build with zero warnings and pass -- 113/113 on five host configurations,
100/100 on the two MISRA builds, 118/118 on SMP, 3/3 FreeRTOS. With
TX_ENABLE_CONST_NAMES set, the host default and both MISRA configurations, the
SMP trace configuration and the FreeRTOS adapter build with zero warnings and
pass.

Co-authored-by: Tilen Majerle <tilen@majerle.eu>
Assisted-by: Codex (gpt-6-astra) <noreply@openai.com>
Assisted-by: Claude Code (Opus 5) <noreply@anthropic.com>

common_modules/module_manager/inc/txm_module_manager_util.h

@@ -186,7 +186,7 @@
 
 UINT    _txm_module_manager_object_memory_check(TXM_MODULE_INSTANCE *module_instance, ALIGN_TYPE object_ptr, ULONG object_size);
 UINT    _txm_module_manager_object_size_check(ALIGN_TYPE object_ptr, ULONG object_size);
-UINT    _txm_module_manager_object_name_compare(CHAR *object_name1, UINT object_name1_length, CHAR *object_name2);
+UINT    _txm_module_manager_object_name_compare(CHAR *object_name1, UINT object_name1_length, TX_NAME_CONST CHAR *object_name2);
 UCHAR   _txm_module_manager_created_object_check(TXM_MODULE_INSTANCE *module_instance, void *object_ptr);
 UINT    _txm_module_manager_param_check_object_for_creation(TXM_MODULE_INSTANCE *module_instance, ALIGN_TYPE object_ptr, ULONG object_size);
 UINT    _txm_module_manager_param_check_object_for_use(TXM_MODULE_INSTANCE *module_instance, ALIGN_TYPE object_ptr, ULONG object_size);

common_modules/module_manager/src/txm_module_manager_thread_create.c

@@ -84,7 +84,7 @@
 /*    _txm_module_manager_kernel_dispatch   Kernel dispatch function      */
 /*                                                                        */
 /**************************************************************************/
-UINT  _txm_module_manager_thread_create(TX_THREAD *thread_ptr, CHAR *name_ptr,
+UINT  _txm_module_manager_thread_create(TX_THREAD *thread_ptr, TX_NAME_CONST CHAR *name_ptr,
                             VOID (*shell_function)(TX_THREAD *, TXM_MODULE_INSTANCE *),
                             VOID (*entry_function)(ULONG id), ULONG entry_input,
                             VOID *stack_start, ULONG stack_size, UINT priority, UINT preempt_threshold,
@@ -768,4 +768,3 @@ ULONG                   i;
     /* Return success.  */
     return(TX_SUCCESS);
 }
-

common_modules/module_manager/src/txm_module_manager_util.c

@@ -281,7 +281,7 @@ UINT                        return_value;
 /*  09-30-2020      Scott Larson            Initial Version 6.1           */
 /*                                                                        */
 /**************************************************************************/
-UINT  _txm_module_manager_object_name_compare(CHAR *search_name, UINT search_name_length, CHAR *object_name)
+UINT  _txm_module_manager_object_name_compare(CHAR *search_name, UINT search_name_length, TX_NAME_CONST CHAR *object_name)
 {
 
 CHAR    search_name_char;