text: /**************************************************************************/
  /*                                                                        */
  /*       Copyright (c) Microsoft Corporation. All rights reserved.        */
  /*                                                                        */
  /*       This software is licensed under the Microsoft Software License   */
  /*       Terms for Microsoft Azure RTOS. Full text of the license can be  */
  /*       found in the LICENSE file at https://aka.ms/AzureRTOS_EULA       */
  /*       and in the root directory of this software.                      */
  /*                                                                        */
  /**************************************************************************/
  
  
  /**************************************************************************/
  /**************************************************************************/
  /**                                                                       */
  /** ThreadX Component                                                     */
  /**                                                                       */
  /**   Thread                                                              */
  /**                                                                       */
  /**************************************************************************/
  /**************************************************************************/
  
  #define TX_SOURCE_CODE
  
  
  /* Include necessary system files.  */
  
  #include "tx_api.h"
  #include "tx_initialize.h"
  #include "tx_thread.h"
  
  /**************************************************************************/
  /*                                                                        */
  /*  FUNCTION                                               RELEASE        */
  /*                                                                        */
  /*    _txe_thread_secure_stack_allocate                   Cortex-M23      */
  /*                                                           6.1          */
  /*  AUTHOR                                                                */
  /*                                                                        */
  /*    Scott Larson, Microsoft Corporation                                 */
  /*                                                                        */
  /*  DESCRIPTION                                                           */
  /*                                                                        */
  /*    This function checks for errors in the secure stack allocate        */
  /*    function call.                                                      */
  /*                                                                        */
  /*  INPUT                                                                 */
  /*                                                                        */
  /*    thread_ptr                            Thread control block pointer  */
  /*    stack_size                            Size of secure stack to       */
  /*                                            allocate                    */
  /*                                                                        */
  /*  OUTPUT                                                                */
  /*                                                                        */
  /*    TX_THREAD_ERROR                       Invalid thread pointer        */
  /*    TX_CALLER_ERROR                       Invalid caller of function    */
  /*    status                                Actual completion status      */
  /*                                                                        */
  /*  CALLS                                                                 */
  /*                                                                        */
  /*    _tx_thread_secure_stack_allocate      Actual stack alloc function   */
  /*                                                                        */
  /*  CALLED BY                                                             */
  /*                                                                        */
  /*    Application Code                                                    */
  /*                                                                        */
  /*  RELEASE HISTORY                                                       */
  /*                                                                        */
  /*    DATE              NAME                      DESCRIPTION             */
  /*                                                                        */
  /*  09-30-2020     Scott Larson             Initial Version 6.1           */
  /*                                                                        */
  /**************************************************************************/
  UINT    _txe_thread_secure_stack_allocate(TX_THREAD *thread_ptr, ULONG stack_size)
  {
  #if defined(TX_SINGLE_MODE_SECURE) || defined(TX_SINGLE_MODE_NON_SECURE)
      return(TX_FEATURE_NOT_ENABLED);
  #else
  UINT    status;
      
      /* Default status to success.  */
      status =  TX_SUCCESS;
      
      /* Check for an invalid thread pointer.  */
      if (thread_ptr == TX_NULL)
      {
          /* Thread pointer is invalid, return appropriate error code.  */
          status =  TX_THREAD_ERROR;
      }
  
      /* Now check for invalid thread ID.  */
      else if (thread_ptr -> tx_thread_id != TX_THREAD_ID)
      {
          /* Thread pointer is invalid, return appropriate error code.  */
          status =  TX_THREAD_ERROR;
      }
      
      /* Check for interrupt call.  */
      if (TX_THREAD_GET_SYSTEM_STATE() != ((ULONG) 0))
      {
          /* Is call from an interrupt and not initialization?  */
          if (TX_THREAD_GET_SYSTEM_STATE() < TX_INITIALIZE_IN_PROGRESS)
          {
              /* Invalid caller of this function, return appropriate error code.  */
              status =  TX_CALLER_ERROR;
          }
      }
      
      /* Determine if everything is okay.  */
      if (status == TX_SUCCESS)
      {
          /* Call actual secure stack allocate function.  */
          status =  _tx_thread_secure_stack_allocate(thread_ptr, stack_size);
      }
  
      /* Return completion status.  */
      return(status);
  #endif
  }
  