From: jsanchor@my-dejanews.com
Subject: Access types
Date: 1998/05/27
Date: 1998-05-27T00:00:00+00:00 [thread overview]
Message-ID: <6khbm1$ec1$1@nnrp1.dejanews.com> (raw)
HI, I am working with access types and have a challenge at hand which I seem
to be losing. Need some help. I have data in Non Volatile Memory and RAM that
I need to access using access types. The problem is I need to have the same
"types" to work on the data, ie compare them, calculate checksum, etc.
ex. I have a package that looks like this:
-------------NVM--------------------------------------
type Non_Volatile_Type is tagged private;
type Ptr_to_Non_Volatile_Type is access all Non_Volatile_Type'class;
????Ptr_to_Data : access Non_Volatile_Type'Class?????;
type Information_Record_Type is
record
Tag_Part : Tag;
NVM_Access : Ptr_to_Data???;
RAM_Access : Ptr_to_Data???;
end record;
procedure Compute_Checksum (block : ???Ptr_to_Data);
or
procedure Compute_Checksum (block : ???access Non_Volatile_Type'Class);
private
type Non_Volatile_Type is tagged
record
checksum : Storage_Element;
end record;
Somebody trying to use my package will declare a package somewhat like this
---------------------USER Spec------------------------------------
type List_NVM_Type is new ddNVM.Non_Volatile_Type with
record
word1 : INTEGER := 8;
end record;
---------------------USER Body------------------------------------
procedure test is
my_nvm : aliased List_NVM_Type;
begin
ddNVM.Compute_checksum(my_nvm'access);
end test;
Does anybody know of a way. Thanks in advance.
sincerely,
Jay Sanchorawala.
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next reply other threads:[~1998-05-27 0:00 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
1998-05-27 0:00 jsanchor [this message]
1998-05-28 0:00 ` Access types Jerry van Dijk
1998-05-29 0:00 ` jsanchor
1998-05-30 0:00 ` Jerry van Dijk
-- strict thread matches above, loose matches on Subject: below --
1999-07-15 0:00 Access Types Ronald Ayoub
1999-07-21 0:00 ` Robert A Duff
1999-07-22 0:00 ` Steve Folly
1999-07-23 0:00 ` Tucker Taft
2007-07-01 0:39 access types Brian May
2007-07-01 1:54 ` Robert A Duff
2007-07-01 7:52 ` Dmitry A. Kazakov
2007-07-01 14:57 ` Robert A Duff
2007-07-01 19:41 ` Dmitry A. Kazakov
2007-07-02 0:12 ` Robert A Duff
2007-07-02 8:06 ` Dmitry A. Kazakov
2007-07-02 15:37 ` Adam Beneschan
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