VxWorks support

[biabbas]

Fixes #44

[coderabbitai[bot]]

Walkthrough

The changes enhance support for the VxWorks operating system within the src/unix.rs and src/lib.rs modules. Modifications include the introduction of the SCHED_SPORADIC scheduling policy and updates to error handling functions specific to VxWorks. The RealtimeThreadSchedulePolicy enum is extended with a new Sporadic variant, and the set_thread_priority_and_policy function is adjusted for VxWorks compatibility. Additionally, the src/lib.rs file includes conditional compilation directives and updates to the ThreadPriorityValue struct to define a maximum thread priority specific to VxWorks.

Changes

File(s)	Change Summary
src/unix.rs	Added Sporadic variant to RealtimeThreadSchedulePolicy. Introduced errno() and set_errno() functions. Updated to_posix method to handle Sporadic. Modified set_thread_priority_and_policy to include VxWorks handling.
src/lib.rs	Updated module declaration for unix to include target_os = "vxworks". Defined new MAX constant in ThreadPriorityValue struct for VxWorks. Updated error messages for ThreadPriorityValue to specify range for VxWorks.
tests/unix.rs	Added support for VxWorks in multiple test functions. Duplicated get_and_set_priority_with_normal_policies for VxWorks. Maintained error handling logic for invalid priority values.

Poem

In the land of threads where bunnies play,
VxWorks hops in, brightening the day.
With policies new and errors in check,
Our library's strong, what the heck!
So let’s thread our way through the code,
With joy in our hearts, let the changes explode! 🐇✨

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[biabbas]

r? @iddm

[biabbas]

Cargo test fails for VxWorks. The max value check in lib.rs for threadpriority seems to be the problem.

[vxWorks *]# ./unix-2dd6dee514656752.vxe

running 2 tests
test get_and_set_priority_with_realtime_policy_requires_capabilities::case_1_fifo ... FAILED
test get_and_set_priority_with_realtime_policy_requires_capabilities::case_2_roundrobin ... FAILED

failures:

---- get_and_set_priority_with_realtime_policy_requires_capabilities::case_1_fifo stdout ----
thread 'get_and_set_priority_with_realtime_policy_requires_capabilities::case_1_fifo' panicked at 'called `Result::unwrap()` on an `Err` value: "The value is not in the range of [0;99]"', tests/unix.rs:158:82
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

---- get_and_set_priority_with_realtime_policy_requires_capabilities::case_2_roundrobin stdout ----
thread 'get_and_set_priority_with_realtime_policy_requires_capabilities::case_2_roundrobin' panicked at 'called `Result::unwrap()` on an `Err` value: "The value is not in the range of [0;99]"', tests/unix.rs:158:82

failures:
    get_and_set_priority_with_realtime_policy_requires_capabilities::case_1_fifo
    get_and_set_priority_with_realtime_policy_requires_capabilities::case_2_roundrobin

test result: FAILED. 0 passed; 2 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.70s

[biabbas]

Test results for VxWorks

[vxWorks *]# ./tests/common-a84adfa34cf086c5.vxe

running 3 tests
test should_be_impossible_to_get_other_thread_native_id_via_threadext ... ok
test should_be_possible_to_get_current_thread_native_id_via_threadext ... ok
test should_be_possible_to_reset_the_same_priority ... ok

test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.07s

[vxWorks *]# ./tests/unix-2dd6dee514656752.vxe

running 6 tests
test get_and_set_priority_with_normal_policies::policy_1_ThreadSchedulePolicy__Normal_NormalThreadSchedulePolicy__Other_::priority_1_ThreadPriority__Min ... ok
test get_and_set_priority_with_normal_policies::policy_1_ThreadSchedulePolicy__Normal_NormalThreadSchedulePolicy__Other_::priority_2_ThreadPriority__Max ... ok
test get_and_set_priority_with_normal_policies::policy_1_ThreadSchedulePolicy__Normal_NormalThreadSchedulePolicy__Other_::priority_3_ThreadPriority__Crossplatform_23u8_try_into___unwrap___ ... ok
test get_and_set_priority_with_normal_policy ... ok
test get_and_set_priority_with_realtime_policy_requires_capabilities::case_1_fifo ... ok
test get_and_set_priority_with_realtime_policy_requires_capabilities::case_2_roundrobin ... ok

test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.10s

[vxWorks *]# ./tests/thread_priority-16d21276c67c2411.vxe

running 2 tests
test unix::tests::change_between_realtime_and_normal_policies_requires_capabilities ... ok
test unix::tests::thread_schedule_policy_param_test ... ok

test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.05s

[biabbas]

review? @iddm

[biabbas]

@iddm How do we get these changes into a stable release?

[iddm]

Thank you! Available in https://crates.io/crates/thread-priority/1.2.0