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pub mod context;
pub mod process;
pub mod proc_list;
pub mod coop_sched;

use self::coop_sched as scheduler;

pub use self::process::{Process, ProcessId, State};
pub use self::proc_list::ProcessList;
pub use self::scheduler::Scheduler;
use core::result::Result;
use alloc::string::String;

/// Methods a scheduler should impl.
pub trait Scheduling {
    fn create(&self, func: extern "C" fn(), name: String) -> Result<ProcessId, i16>;
    fn get_id(&self) -> ProcessId;
    fn kill(&self, id: ProcessId);
    fn ready(&self, id: ProcessId);
    unsafe fn resched(&self);
}

/// Max no. of processes we can handle.
pub const MAX_PROCS: usize = usize::max_value() - 1;

/// Initial size of vector stack.
pub const INITIAL_STACK: usize = 1024;

lazy_static! {
    /// Global kernel scheduler.
    pub static ref SCHEDULER: Scheduler = Scheduler::new();
}