fidl_next_protocol/
framework_error.rs

1// Copyright 2024 The Fuchsia Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5use core::fmt;
6use core::hint::unreachable_unchecked;
7use core::mem::MaybeUninit;
8
9use fidl_next_codec::{
10    munge, Decode, DecodeError, Encodable, Encode, EncodeError, Slot, TakeFrom, WireI32,
11    ZeroPadding,
12};
13
14/// An internal framework error.
15#[derive(Clone, Copy, Debug)]
16#[repr(i32)]
17pub enum FrameworkError {
18    /// The protocol method was not recognized by the receiver.
19    UnknownMethod = -2,
20}
21
22/// An internal framework error.
23#[derive(Clone, Copy)]
24#[repr(transparent)]
25pub struct WireFrameworkError {
26    inner: WireI32,
27}
28
29unsafe impl ZeroPadding for WireFrameworkError {
30    #[inline]
31    fn zero_padding(_: &mut MaybeUninit<Self>) {}
32}
33
34impl fmt::Debug for WireFrameworkError {
35    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
36        FrameworkError::from(*self).fmt(f)
37    }
38}
39
40impl From<WireFrameworkError> for FrameworkError {
41    fn from(value: WireFrameworkError) -> Self {
42        match *value.inner {
43            -2 => Self::UnknownMethod,
44            _ => unsafe { unreachable_unchecked() },
45        }
46    }
47}
48
49unsafe impl<D: ?Sized> Decode<D> for WireFrameworkError {
50    fn decode(slot: Slot<'_, Self>, _: &mut D) -> Result<(), DecodeError> {
51        munge!(let Self { inner } = slot);
52        match **inner {
53            -2 => Ok(()),
54            code => Err(DecodeError::InvalidFrameworkError(code)),
55        }
56    }
57}
58
59impl Encodable for FrameworkError {
60    type Encoded = WireFrameworkError;
61}
62
63unsafe impl<E: ?Sized> Encode<E> for FrameworkError {
64    fn encode(
65        &mut self,
66        _: &mut E,
67        out: &mut MaybeUninit<Self::Encoded>,
68    ) -> Result<(), EncodeError> {
69        munge!(let WireFrameworkError { inner } = out);
70        inner.write(WireI32(match self {
71            Self::UnknownMethod => -2,
72        }));
73
74        Ok(())
75    }
76}
77
78impl TakeFrom<WireFrameworkError> for FrameworkError {
79    fn take_from(from: &WireFrameworkError) -> Self {
80        Self::from(*from)
81    }
82}
fidl_next_protocol/framework_error.rs

fidl_next_protocol/
framework_error.rs
