[Bug 1924] Enhanced stack allocator configuration

[bugzilla-daemon at rtems.org]

https://www.rtems.org/bugzilla/show_bug.cgi?id=1924

Gedare <gedare at rtems.org> changed:

           What    |Removed                     |Added
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                 CC|                            |gedare at rtems.org

--- Comment #3 from Gedare <gedare at rtems.org> 2011-11-09 08:38:58 CST ---
(In reply to comment #2)
> Created attachment 1370 [details]
> Configuration changes.
> 
> This patch adds the following fields to the Configuration:
> 
> +  /** This field specifies the size in bytes of the RTEMS thread stack space.
> +   */
> +  uintptr_t                      stack_space_size;
> +
> +  /**
> +   * @brief Specifies if a unified work area is used or not.
> +   *
> +   * If this element is @a true, then the RTEMS Workspace and the C Program
> +   * Heap use the same heap, otherwise they use separate heaps.
> +   */
> +  bool                           unified_work_area;
> +
> +  /**
> +   * @brief Specifies if the stack allocator avoids the work space.
> +   *
> +   * If this element is @a true, then the stack allocator must not allocate
> the
> +   * thread stacks from the RTEMS Workspace, otherwise it should allocate the
> +   * thread stacks from the RTEMS Workspace.
> +   */
> +  bool                           stack_allocator_avoids_work_space;
> 
> The unified_work_area field replaces the rtems_unified_work_area global
> variable.
> 
> The work space estimate is split up into a separate work and stack space
> estimate.
> 
> A new CONFIGURE_TASK_STACK_ALLOCATOR_AVOIDS_WORK_SPACE configuration define is
> available.

This makes sense to me. It is hard to follow the diff through confdefs though,
so I guess we'll see what the final result looks like...

Inline routines might be better than macros for getting and setting
configuration variables, but that is a minor nit.

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