ableos/kernel/src/utils.rs

//! A module for small utilities to be used kernel wide
//! Simple functions and constants

/// Used when tab `\t` in hardware is not known and we will default to two spaces
pub const TAB: &str = "  ";

// NOTE: this only reduces the code duplication in source code not in generated code!
// Written by Yours Truly: Munir
/// A simple macro to reduce code duplication when we use TAB internally
#[macro_export]
macro_rules! tab {
    ($num:expr) => {
        TAB.repeat($num)
    };
}

// NOTE: this only reduces the code duplication in source code not in generated code!
// Written by Yours Truly: Munir
/// A simple macro to reduce code duplication when we insert device types into the device tree
#[macro_export]
macro_rules! device_tree {
    ($devtree:expr, $dev_type_vec:expr) => {
        for each_device_type in $dev_type_vec {
            $devtree.devices.insert(each_device_type, Vec::new());
        }
    };
}

// NOTE: this only reduces the code duplication in source code not in generated code!
// Written by Yours Truly: Munir
/// A simple macro to reduce code duplication when we insert cpu features into the array/vector
#[macro_export]
macro_rules! cpu_features {
    ($cpu_master_object:expr, $result_vec:expr) => {
        // checks for cpu features and returns bool for each feature
        let apic = $cpu_master_object.apic();
        let avx = $cpu_master_object.avx();
        let avx2 = $cpu_master_object.avx2();
        let x2 = $cpu_master_object.x2apic();
        let gb_pages = $cpu_master_object.gigabyte_pages();
        let rdseed = $cpu_master_object.rdseed();
        let rdrand = $cpu_master_object.rdrand();

        $result_vec.push(("apic", apic));
        $result_vec.push(("avx", avx));
        $result_vec.push(("avx2", avx2));
        $result_vec.push(("gigabyte pages", gb_pages));
        $result_vec.push(("rdrand", rdrand));
        $result_vec.push(("rdseed", rdseed));
        $result_vec.push(("x2apic", x2));
    };
}