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| author | Johannes Kliemann <kliemann@adacore.com> | 2023-05-12 13:21:22 +0000 |
|---|---|---|
| committer | Marc Poulhiès <poulhies@adacore.com> | 2023-06-15 09:59:36 +0200 |
| commit | b36be75b29d7fc5c6ab3c48229f9521ae91c6a2c (patch) | |
| tree | 3377f39d421bd94e1858e6e8503a20a94669d64b /gcc/ada | |
| parent | 1de3b5a7b57c7c02a216d2f6c709639536a45818 (diff) | |
| download | gcc-b36be75b29d7fc5c6ab3c48229f9521ae91c6a2c.zip gcc-b36be75b29d7fc5c6ab3c48229f9521ae91c6a2c.tar.gz gcc-b36be75b29d7fc5c6ab3c48229f9521ae91c6a2c.tar.bz2 | |
ada: Adjust QNX Ada priorities to match QNX system priorities
The Ada priority range of the QNX runtime started from 0, differing from
the QNX system priorities range starting from 1. As this may cause
confusion, especially if used in a mixed language environment, the Ada
priority range now starts at 1.
The default priority of Ada tasks as mandated is the middle of the
priority range. On QNX this means the default priority of Ada tasks is
30. This is much higher than the default QNX priority of 10 and may
cause unexpected system interruptions when Ada tasks take a lot of CPU time.
gcc/ada/
* libgnarl/s-osinte__qnx.adb: Adjust priority conversion function.
* libgnat/system-qnx-arm.ads: Adjust priority range and default
priority.
Diffstat (limited to 'gcc/ada')
| -rw-r--r-- | gcc/ada/libgnarl/s-osinte__qnx.adb | 2 | ||||
| -rw-r--r-- | gcc/ada/libgnat/system-qnx-arm.ads | 14 |
2 files changed, 7 insertions, 9 deletions
diff --git a/gcc/ada/libgnarl/s-osinte__qnx.adb b/gcc/ada/libgnarl/s-osinte__qnx.adb index bf08ecb..127d179 100644 --- a/gcc/ada/libgnarl/s-osinte__qnx.adb +++ b/gcc/ada/libgnarl/s-osinte__qnx.adb @@ -87,7 +87,7 @@ package body System.OS_Interface is (Prio : System.Any_Priority) return Interfaces.C.int is begin - return Interfaces.C.int (Prio) + 1; + return Interfaces.C.int (Prio); end To_Target_Priority; ----------------- diff --git a/gcc/ada/libgnat/system-qnx-arm.ads b/gcc/ada/libgnat/system-qnx-arm.ads index 344bd61..1dd1a22 100644 --- a/gcc/ada/libgnat/system-qnx-arm.ads +++ b/gcc/ada/libgnat/system-qnx-arm.ads @@ -95,22 +95,20 @@ package System is -- Priority-related Declarations (RM D.1) - -- System priority is Ada priority + 1, so lies in the range 1 .. 63. - -- -- If the scheduling policy is SCHED_FIFO or SCHED_RR the runtime makes use -- of the entire range provided by the system. -- -- If the scheduling policy is SCHED_OTHER the only valid system priority -- is 1 and other values are simply ignored. - Max_Priority : constant Positive := 61; - Max_Interrupt_Priority : constant Positive := 62; + Max_Priority : constant Positive := 62; + Max_Interrupt_Priority : constant Positive := 63; - subtype Any_Priority is Integer range 0 .. 62; - subtype Priority is Any_Priority range 0 .. 61; - subtype Interrupt_Priority is Any_Priority range 62 .. 62; + subtype Any_Priority is Integer range 1 .. 63; + subtype Priority is Any_Priority range 1 .. 62; + subtype Interrupt_Priority is Any_Priority range 63 .. 63; - Default_Priority : constant Priority := 30; + Default_Priority : constant Priority := 10; private |