diff options
Diffstat (limited to 'gcc/ada/s-stalib.ads')
| -rw-r--r-- | gcc/ada/s-stalib.ads | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/gcc/ada/s-stalib.ads b/gcc/ada/s-stalib.ads index bdd447538f8..84bf0b9e737 100644 --- a/gcc/ada/s-stalib.ads +++ b/gcc/ada/s-stalib.ads @@ -6,7 +6,7 @@ -- -- -- S p e c -- -- -- --- Copyright (C) 1992-2002 Free Software Foundation, Inc. -- +-- Copyright (C) 1992-2004 Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- @@ -97,6 +97,20 @@ package System.Standard_Library is type Exception_Data_Ptr is access all Exception_Data; -- An equivalent of Exception_Id that is public + type Exception_Code is mod 2 ** 32; + -- A scalar value bound to some exception data. Typically used for + -- imported or exported exceptions on VMS. Having a separate type for this + -- is useful to enforce consistency throughout the various run-time units + -- handling such codes, and having it unsigned is the most appropriate + -- choice for it's currently single use on VMS. + + -- ??? The construction in Cstand has no way to access the proper type + -- node for Exception_Code, and currently uses Standard_Unsigned as a + -- fallback. The representations shall match, and the size clause below + -- is aimed at ensuring that. + + for Exception_Code'Size use Integer'Size; + -- The following record defines the underlying representation of exceptions -- WARNING! Any changes to this may need to be reflectd in the following @@ -131,7 +145,7 @@ package System.Standard_Library is -- built (by Register_Exception in s-exctab.adb) for converting between -- identities and names. - Import_Code : Integer; + Import_Code : Exception_Code; -- Value for imported exceptions. Needed only for the handling of -- Import/Export_Exception for the VMS case, but present in all -- implementations (we might well extend this mechanism for other |
