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Add constant mps_rm_prot_inner and document it.

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Gareth Rees 2014-10-14 22:59:32 +01:00
parent 411e38946d
commit 423bb95e4c
2 changed files with 13 additions and 4 deletions
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5
mps/code/mps.h
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@ -294,8 +294,9 @@ extern mps_rank_t mps_rank_weak(void);
/* Root Modes */
/* .rm: Keep in sync with <code/mpmtypes.h#rm> */
#define MPS_RM_CONST (((mps_rm_t)1<<0))
#define MPS_RM_PROT (((mps_rm_t)1<<1))
#define MPS_RM_CONST (((mps_rm_t)1<<0))
#define MPS_RM_PROT (((mps_rm_t)1<<1))
#define MPS_RM_PROT_INNER (((mps_rm_t)1<<1))
/* Allocation Point */

12
mps/manual/source/topic/root.rst
View file

@ -242,8 +242,8 @@ allowing the MPS to detect whether they have changed.
The type of :term:`root modes`.
It should be zero (meaning neither constant or protectable), or
the sum of some subset of :c:macro:`MPS_RM_CONST` and
:c:macro:`MPS_RM_PROT`.
the sum of some of :c:macro:`MPS_RM_CONST`,
:c:macro:`MPS_RM_PROT`, and :c:macro:`MPS_RM_PROT_INNER`.
.. c:macro:: MPS_RM_CONST
@ -289,6 +289,14 @@ allowing the MPS to detect whether they have changed.
wants the operating system to be able to access the root. Many
operating systems can't cope with writing to protected pages.
.. c:macro:: MPS_RM_PROT_INNER
The :term:`root mode` for :term:`protectable roots` whose inner
pages (only) may be protected. This mode must not be specified
unless :c:macro:`MPS_RM_PROT` is also specified. It tells the MPS
that it may not place a :term:`barrier (1)` on a :term:`page`
that's partly (but not wholly) covered by the :term:`root`.
.. index::
single: root; interface