| /// A system call error code. This can either be an error code returned by the |
| /// kernel or BADRVAL, which indicates the kernel returned the wrong type of |
| /// response to a system call. |
| // ErrorCode is not an enum so that conversion from the kernel's return value (a |
| // `usize` in a register) is free. |
| // TODO: derive(Debug) is currently only enabled for test builds, which is |
| // necessary so it can be used in assert_eq!. We should develop a lighter-weight |
| // Debug implementation and see if it is small enough to enable on non-Debug |
| // builds. |
| #[cfg_attr(test, derive(Debug))] |
| #[derive(Clone, Copy, PartialEq, Eq)] |
| pub struct ErrorCode(usize); |
| |
| impl From<usize> for ErrorCode { |
| fn from(value: usize) -> ErrorCode { |
| ErrorCode(value) |
| } |
| } |
| |
| impl From<ErrorCode> for usize { |
| fn from(error_code: ErrorCode) -> usize { |
| error_code.0 |
| } |
| } |
| |
| pub const FAIL: ErrorCode = ErrorCode(1); |
| pub const BUSY: ErrorCode = ErrorCode(2); |
| pub const ALREADY: ErrorCode = ErrorCode(3); |
| pub const OFF: ErrorCode = ErrorCode(4); |
| pub const RESERVE: ErrorCode = ErrorCode(5); |
| pub const INVALID: ErrorCode = ErrorCode(6); |
| pub const SIZE: ErrorCode = ErrorCode(7); |
| pub const CANCEL: ErrorCode = ErrorCode(8); |
| pub const NOMEM: ErrorCode = ErrorCode(9); |
| pub const NOSUPPORT: ErrorCode = ErrorCode(10); |
| pub const NODEVICE: ErrorCode = ErrorCode(11); |
| pub const UNINSTALLED: ErrorCode = ErrorCode(12); |
| pub const NOACK: ErrorCode = ErrorCode(13); |
| pub const BADRVAL: ErrorCode = ErrorCode(1024); |
