Node / public / precursor-lxmfchat.git / files / xous-core / kernel / src / debug / gdb / current_active_pid.rs

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use gdbstub::common::Pid;

use gdbstub::target::ext::extended_mode::CurrentActivePid;

use super::XousTarget;

// https://users.rust-lang.org/t/compile-time-const-unwrapping/51619/7

//

// This works from Rust 1.46.0 onwards, which stabilized branching and looping

// in const contexts.

macro_rules! unwrap {

($e:expr $(,)*) => {

match $e {

::core::option::Option::Some(x) => x,

::core::option::Option::None => {

["tried to unwrap a None"][99];

loop {}

}

}

};

}

/// (Internal) The fake Pid reported to GDB when running in multi-threaded mode.

const FAKE_PID: Pid = unwrap!(Pid::new(1));

impl CurrentActivePid for XousTarget {

fn current_active_pid(&mut self) -> Result<Pid, Self::Error> {

Ok(self.pid.map(|v| v.into()).unwrap_or(FAKE_PID))

}

}