ax-runtime 0.11.1

use ax_alloc::AllocError;
#[cfg(feature = "paging")]
use ax_hal::cache::TlbShootdownError;
#[cfg(feature = "irq")]
use ax_hal::irq::IrqError;
#[cfg(feature = "paging")]
use ax_mm::MmError;
#[cfg(feature = "fs")]
use axfs_ng_vfs::VfsError;
#[cfg(feature = "paging")]
use axklib::KlibError;
#[cfg(all(feature = "irq", feature = "multitask"))]
use rdif_serial::ConfigError;

/// Errors owned by the ArceOS runtime layer.
#[derive(Clone, Copy, Debug, Eq, PartialEq, thiserror::Error)]
pub enum RuntimeError {
    /// Address-space management failed while updating runtime mappings.
    #[cfg(feature = "paging")]
    #[error(transparent)]
    Mm(#[from] MmError),
    /// A cross-CPU TLB invalidation failed after a mapping update.
    #[cfg(feature = "paging")]
    #[error(transparent)]
    TlbShootdown(#[from] TlbShootdownError),
    /// Interrupt discovery or registration failed.
    #[cfg(feature = "irq")]
    #[error(transparent)]
    Irq(#[from] IrqError),
    /// Runtime-owned storage allocation failed.
    #[error(transparent)]
    Allocation(#[from] AllocError),
    /// A filesystem operation used by a runtime adapter failed.
    #[cfg(feature = "fs")]
    #[error(transparent)]
    Vfs(#[from] VfsError),
    /// A UART rejected its requested configuration.
    #[cfg(all(feature = "irq", feature = "multitask"))]
    #[error(transparent)]
    SerialConfig(#[from] ConfigError),
    /// A platform console ownership transition was requested out of order.
    #[cfg(all(feature = "irq", feature = "multitask"))]
    #[error(transparent)]
    ConsoleHandoff(#[from] ax_hal::console::ConsoleHandoffError),
    /// Another serial runtime already owns console log routing.
    #[cfg(all(feature = "irq", feature = "multitask"))]
    #[error("another serial runtime already owns console routing")]
    SerialConsoleBusy,
    /// The runtime console handoff failed after early ownership was revoked.
    #[cfg(all(feature = "irq", feature = "multitask"))]
    #[error("runtime console failed closed")]
    ConsoleFailedClosed,
    /// A serial operation requires a running port.
    #[error("serial runtime is not started")]
    SerialNotStarted,
    /// The bounded serial control queue is full.
    #[error("serial control queue is busy")]
    SerialControlBusy,
    /// A bounded runtime queue has no capacity without waiting.
    #[error("runtime operation would block")]
    WouldBlock,
    /// The selected runtime capability does not support the operation.
    #[error("runtime operation is not supported")]
    OperationNotSupported,
    /// A CPU index is outside the runtime's online CPU set.
    #[error("invalid runtime CPU index {cpu}")]
    InvalidCpu { cpu: usize },
}

/// A result returned by an ArceOS runtime-owned operation.
pub type RuntimeResult<T = ()> = Result<T, RuntimeError>;

/// Adapt a runtime-domain error at the external kernel capability boundary.
#[cfg(feature = "paging")]
pub(crate) fn runtime_error_to_klib_error(error: RuntimeError) -> KlibError {
    match error {
        #[cfg(feature = "paging")]
        RuntimeError::Mm(error) => match error {
            MmError::InvalidInput(_) => KlibError::InvalidInput,
            MmError::NoMemory => KlibError::NoMemory,
            MmError::AlreadyExists => KlibError::AlreadyExists,
            MmError::BadAddress => KlibError::BadAddress,
            MmError::BadState(_) => KlibError::BadState,
            MmError::Unsupported => KlibError::Unsupported,
        },
        #[cfg(feature = "paging")]
        RuntimeError::TlbShootdown(error) => match error {
            TlbShootdownError::CpuOffline | TlbShootdownError::Unsupported => {
                KlibError::Unsupported
            }
            TlbShootdownError::Timeout => KlibError::TimedOut,
            TlbShootdownError::Platform => KlibError::Io,
        },
        #[cfg(feature = "irq")]
        RuntimeError::Irq(error) => match error {
            IrqError::InvalidIrq | IrqError::InvalidCpu => KlibError::InvalidInput,
            IrqError::CpuOffline | IrqError::Unsupported => KlibError::Unsupported,
            IrqError::Timeout => KlibError::TimedOut,
            IrqError::Busy | IrqError::InIrqContext => KlibError::ResourceBusy,
            IrqError::NoMemory => KlibError::NoMemory,
            IrqError::NotFound => KlibError::NotFound,
            IrqError::Controller => KlibError::Io,
        },
        RuntimeError::Allocation(_) => KlibError::NoMemory,
        #[cfg(feature = "fs")]
        RuntimeError::Vfs(error) => match error {
            VfsError::AlreadyExists => KlibError::AlreadyExists,
            VfsError::BadAddress => KlibError::BadAddress,
            VfsError::NoMemory => KlibError::NoMemory,
            VfsError::ResourceBusy => KlibError::ResourceBusy,
            VfsError::TimedOut => KlibError::TimedOut,
            VfsError::Unsupported | VfsError::OperationNotSupported => KlibError::Unsupported,
            _ => KlibError::Io,
        },
        #[cfg(all(feature = "irq", feature = "multitask"))]
        RuntimeError::SerialConfig(error) => match error {
            ConfigError::InvalidBaudrate
            | ConfigError::UnsupportedDataBits
            | ConfigError::UnsupportedStopBits
            | ConfigError::UnsupportedParity => KlibError::InvalidInput,
            ConfigError::Timeout => KlibError::TimedOut,
            ConfigError::RegisterError => KlibError::Io,
        },
        #[cfg(all(feature = "irq", feature = "multitask"))]
        RuntimeError::ConsoleHandoff(_) => KlibError::BadState,
        #[cfg(all(feature = "irq", feature = "multitask"))]
        RuntimeError::SerialConsoleBusy => KlibError::ResourceBusy,
        #[cfg(all(feature = "irq", feature = "multitask"))]
        RuntimeError::ConsoleFailedClosed => KlibError::BadState,
        RuntimeError::SerialNotStarted => KlibError::BadState,
        RuntimeError::SerialControlBusy => KlibError::ResourceBusy,
        RuntimeError::WouldBlock => KlibError::ResourceBusy,
        RuntimeError::OperationNotSupported => KlibError::Unsupported,
        RuntimeError::InvalidCpu { .. } => KlibError::InvalidInput,
    }
}