ProtectMemoryError

pub const ProtectMemoryError = error{
    UnsupportedOperation,
    /// OpenBSD will refuse to change memory protection if the specified region
    /// contains any pages that have previously been marked immutable using the
    /// `mimmutable` function.
    PermissionDenied,
    /// The memory cannot be given the specified access. This can happen, for
    /// example, if you memory map a file to which you have read-only access,
    /// then use `protectMemory` to mark it writable.
    AccessDenied,
    /// Changing the protection of a memory region would result in the total
    /// number of mappings with distinct attributes exceeding the allowed
    /// maximum.
    OutOfMemory,
} || Io.UnexpectedError