diff options
Diffstat (limited to 'gcc/ada/system-lynxos-ppc.ads')
| -rw-r--r-- | gcc/ada/system-lynxos-ppc.ads | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/gcc/ada/system-lynxos-ppc.ads b/gcc/ada/system-lynxos-ppc.ads index 3aec6f23bb8..3329bc13a63 100644 --- a/gcc/ada/system-lynxos-ppc.ads +++ b/gcc/ada/system-lynxos-ppc.ads @@ -7,7 +7,7 @@ -- S p e c -- -- (LynxOS PPC Version) -- -- -- --- Copyright (C) 1992-2005 Free Software Foundation, Inc. -- +-- Copyright (C) 1992-2005, Free Software Foundation, Inc. -- -- -- -- This specification is derived from the Ada Reference Manual for use with -- -- GNAT. The copyright notice above, and the license provisions that follow -- @@ -91,14 +91,28 @@ package System is -- Priority-related Declarations (RM D.1) - Max_Priority : constant Positive := 254; + -- 17 is the system determined default priority for user applications + -- running on LynxOS. + + -- The standard (Rm 13.7) requires that Default_Priority has the value: + + -- (Priority'First + Priority'Last) / 2. + + -- To allow an appropriate value for Default_Priority and expose a useful + -- range of priorities to the user, we use a range of 0 .. 34 for subtype + -- Priority. + + -- The rest of the range allowed by the system from 35 to 255 is made + -- available here in Interrupt_Priority. + + Max_Priority : constant Positive := 34; Max_Interrupt_Priority : constant Positive := 255; subtype Any_Priority is Integer range 0 .. 255; - subtype Priority is Any_Priority range 0 .. 254; - subtype Interrupt_Priority is Any_Priority range 255 .. 255; + subtype Priority is Any_Priority range 0 .. 34; + subtype Interrupt_Priority is Any_Priority range 35 .. 255; - Default_Priority : constant Priority := 15; + Default_Priority : constant Priority := 17; private |