use types::{
    bounded::CapSlot,
    id::{EndpointId, IrqId, ProcessId, ThreadId},
    permission::Permission,
};

#[derive(Debug)]
pub enum KernelError {
    InvalidSlot(CapSlot),
    RevokedCapability(CapSlot),
    PermissionDenied {
        slot: CapSlot,
        needed: Permission,
    },
    NoFreeSlot,
    InvalidProcess(ProcessId),
    WouldBlock,
    TooManyThreadsInProcess,
    TooManyProcesses,
    InvalidStateTransition(ThreadId),
    InvalidThread(ThreadId),
    TooManyThreads,
    OutOfMemory,
    InvalidEndpoint(EndpointId),
    InvalidIrq(IrqId),
    EndpointFull,
    ProcessCreateDenied,
    IrqAlreadyOwned(IrqId),
    /// Address outside the user window, unaligned, or not owned by the caller.
    InvalidAddress,
    /// The target virtual range already holds a mapping.
    AddressInUse,
    InvalidRegion,
    /// The region is mapped executable somewhere and the request would map
    /// it writable, or the other way round (W^X across processes).
    WritableAndExecutable,
    /// The object a capability would refer to no longer exists.
    NoSuchObject,
    /// The capability names the wrong kind of object for this operation.
    WrongObject,
    /// `Reply` with an empty reply slot, or a call whose reply was dropped.
    NoReply,
    InvalidArgument,
}