feat: gate alloc/std features for no_std/no_alloc support

Gate generated code behind feature flags so consumers can build in
no_std/no_alloc environments:

- Runtime: gate RotoMessage, RotoOwned, BufMutBuilder behind alloc
- Codegen: split DATA_IMPORTS, gate Owned* structs + service code
- Fix RevBuilder::with() to iterate forward without Vec allocation
- Wire up bytes/std via alloc feature (Bytes requires Arc)
- Update consumer Cargo.toml files with proper feature chains
- Add no_std_test example for embedded validation
This commit is contained in:
2026-06-30 01:40:13 -04:00
parent 2ce65496ab
commit 2806772fd1
13 changed files with 304 additions and 955 deletions
+3 -2
View File
@@ -21,5 +21,6 @@ http = "1.1"
tonic-build = "0.12"
[features]
default = ["alloc"]
alloc = []
default = ["std"]
std = ["roto-runtime/std", "alloc"]
alloc = ["roto-runtime/alloc"]
+38 -86
View File
@@ -1,9 +1,5 @@
// @generated by protoc-gen-roto — do not edit
#[allow(unused, unused_imports, unused_assignments, unused_variables, non_camel_case_types)]
use roto_runtime::{ProtoAccessor, ProtoBuilder, RevBuilder, Result, RotoError, read_varint, RepeatedFieldIterator, RotoMessage};
use core::str;
use bytes::{Bytes, BytesMut, Buf, BufMut};
#[allow(unused, unused_imports, unused_assignments, unused_variables, non_camel_case_types)]use roto_runtime::{ProtoAccessor, ProtoBuilder, RevBuilder, Result, RotoError, read_varint, RepeatedFieldIterator};use core::str;use bytes::Buf;#[cfg(feature = "alloc")]use bytes::{Bytes, BytesMut, BufMut};#[cfg(feature = "alloc")]use roto_runtime::RotoMessage;
pub struct UnaryRequest<'a> {
accessor: roto_runtime::ProtoAccessor<'a>,
message_offset: Option<usize>,
@@ -100,8 +96,7 @@ impl<'b> UnaryRequestRevBuilder<'b> {
}
pub fn with(mut self, msg: &UnaryRequest<'_>) -> roto_runtime::Result<Self> {
let fields: Vec<_> = msg.accessor.raw_fields().collect();
for item in fields.into_iter().rev() {
for item in msg.accessor.raw_fields() {
let (field_number, raw_bytes) = item?;
let is_written = match field_number {
1 => self.message_written,
@@ -119,27 +114,13 @@ impl<'b> UnaryRequestRevBuilder<'b> {
}
}
pub struct OwnedUnaryRequest {
pub data: bytes::Bytes,
}
#[cfg(feature = "alloc")]pub struct OwnedUnaryRequest {pub data: bytes::Bytes,}
impl roto_runtime::RotoOwned for OwnedUnaryRequest {
type Reader<'a> = UnaryRequest<'a>;
fn reader(&self) -> UnaryRequest<'_> {
UnaryRequest::new(&self.data).expect("failed to create reader")
}
}
#[cfg(feature = "alloc")]impl roto_runtime::RotoOwned for OwnedUnaryRequest {type Reader<'a> = UnaryRequest<'a>;fn reader(&self) -> UnaryRequest<'_> {UnaryRequest::new(&self.data).expect("failed to create reader")}}
impl roto_runtime::RotoMessage for OwnedUnaryRequest {
fn decode(buf: bytes::Bytes) -> roto_runtime::Result<Self> {
Ok(OwnedUnaryRequest { data: buf })
}
fn bytes(&self) -> bytes::Bytes {
self.data.clone()
}
}
#[cfg(feature = "alloc")]impl roto_runtime::RotoMessage for OwnedUnaryRequest {fn decode(buf: bytes::Bytes) -> roto_runtime::Result<Self> {Ok(OwnedUnaryRequest { data: buf })}
fn bytes(&self) -> bytes::Bytes {self.data.clone()}}
pub struct UnaryResponse<'a> {
accessor: roto_runtime::ProtoAccessor<'a>,
reply_offset: Option<usize>,
@@ -236,8 +217,7 @@ impl<'b> UnaryResponseRevBuilder<'b> {
}
pub fn with(mut self, msg: &UnaryResponse<'_>) -> roto_runtime::Result<Self> {
let fields: Vec<_> = msg.accessor.raw_fields().collect();
for item in fields.into_iter().rev() {
for item in msg.accessor.raw_fields() {
let (field_number, raw_bytes) = item?;
let is_written = match field_number {
1 => self.reply_written,
@@ -255,27 +235,13 @@ impl<'b> UnaryResponseRevBuilder<'b> {
}
}
pub struct OwnedUnaryResponse {
pub data: bytes::Bytes,
}
#[cfg(feature = "alloc")]pub struct OwnedUnaryResponse {pub data: bytes::Bytes,}
impl roto_runtime::RotoOwned for OwnedUnaryResponse {
type Reader<'a> = UnaryResponse<'a>;
fn reader(&self) -> UnaryResponse<'_> {
UnaryResponse::new(&self.data).expect("failed to create reader")
}
}
#[cfg(feature = "alloc")]impl roto_runtime::RotoOwned for OwnedUnaryResponse {type Reader<'a> = UnaryResponse<'a>;fn reader(&self) -> UnaryResponse<'_> {UnaryResponse::new(&self.data).expect("failed to create reader")}}
impl roto_runtime::RotoMessage for OwnedUnaryResponse {
fn decode(buf: bytes::Bytes) -> roto_runtime::Result<Self> {
Ok(OwnedUnaryResponse { data: buf })
}
fn bytes(&self) -> bytes::Bytes {
self.data.clone()
}
}
#[cfg(feature = "alloc")]impl roto_runtime::RotoMessage for OwnedUnaryResponse {fn decode(buf: bytes::Bytes) -> roto_runtime::Result<Self> {Ok(OwnedUnaryResponse { data: buf })}
fn bytes(&self) -> bytes::Bytes {self.data.clone()}}
pub struct StreamingRequest<'a> {
accessor: roto_runtime::ProtoAccessor<'a>,
query_offset: Option<usize>,
@@ -372,8 +338,7 @@ impl<'b> StreamingRequestRevBuilder<'b> {
}
pub fn with(mut self, msg: &StreamingRequest<'_>) -> roto_runtime::Result<Self> {
let fields: Vec<_> = msg.accessor.raw_fields().collect();
for item in fields.into_iter().rev() {
for item in msg.accessor.raw_fields() {
let (field_number, raw_bytes) = item?;
let is_written = match field_number {
1 => self.query_written,
@@ -391,27 +356,13 @@ impl<'b> StreamingRequestRevBuilder<'b> {
}
}
pub struct OwnedStreamingRequest {
pub data: bytes::Bytes,
}
#[cfg(feature = "alloc")]pub struct OwnedStreamingRequest {pub data: bytes::Bytes,}
impl roto_runtime::RotoOwned for OwnedStreamingRequest {
type Reader<'a> = StreamingRequest<'a>;
fn reader(&self) -> StreamingRequest<'_> {
StreamingRequest::new(&self.data).expect("failed to create reader")
}
}
#[cfg(feature = "alloc")]impl roto_runtime::RotoOwned for OwnedStreamingRequest {type Reader<'a> = StreamingRequest<'a>;fn reader(&self) -> StreamingRequest<'_> {StreamingRequest::new(&self.data).expect("failed to create reader")}}
impl roto_runtime::RotoMessage for OwnedStreamingRequest {
fn decode(buf: bytes::Bytes) -> roto_runtime::Result<Self> {
Ok(OwnedStreamingRequest { data: buf })
}
fn bytes(&self) -> bytes::Bytes {
self.data.clone()
}
}
#[cfg(feature = "alloc")]impl roto_runtime::RotoMessage for OwnedStreamingRequest {fn decode(buf: bytes::Bytes) -> roto_runtime::Result<Self> {Ok(OwnedStreamingRequest { data: buf })}
fn bytes(&self) -> bytes::Bytes {self.data.clone()}}
pub struct StreamingResponse<'a> {
accessor: roto_runtime::ProtoAccessor<'a>,
item_offset: Option<usize>,
@@ -508,8 +459,7 @@ impl<'b> StreamingResponseRevBuilder<'b> {
}
pub fn with(mut self, msg: &StreamingResponse<'_>) -> roto_runtime::Result<Self> {
let fields: Vec<_> = msg.accessor.raw_fields().collect();
for item in fields.into_iter().rev() {
for item in msg.accessor.raw_fields() {
let (field_number, raw_bytes) = item?;
let is_written = match field_number {
1 => self.item_written,
@@ -527,65 +477,67 @@ impl<'b> StreamingResponseRevBuilder<'b> {
}
}
pub struct OwnedStreamingResponse {
pub data: bytes::Bytes,
}
#[cfg(feature = "alloc")]pub struct OwnedStreamingResponse {pub data: bytes::Bytes,}
impl roto_runtime::RotoOwned for OwnedStreamingResponse {
type Reader<'a> = StreamingResponse<'a>;
fn reader(&self) -> StreamingResponse<'_> {
StreamingResponse::new(&self.data).expect("failed to create reader")
}
}
#[cfg(feature = "alloc")]impl roto_runtime::RotoOwned for OwnedStreamingResponse {type Reader<'a> = StreamingResponse<'a>;fn reader(&self) -> StreamingResponse<'_> {StreamingResponse::new(&self.data).expect("failed to create reader")}}
impl roto_runtime::RotoMessage for OwnedStreamingResponse {
fn decode(buf: bytes::Bytes) -> roto_runtime::Result<Self> {
Ok(OwnedStreamingResponse { data: buf })
}
#[cfg(feature = "alloc")]impl roto_runtime::RotoMessage for OwnedStreamingResponse {fn decode(buf: bytes::Bytes) -> roto_runtime::Result<Self> {Ok(OwnedStreamingResponse { data: buf })}
fn bytes(&self) -> bytes::Bytes {
self.data.clone()
}
}
fn bytes(&self) -> bytes::Bytes {self.data.clone()}}
#[allow(unused, unused_imports, unused_assignments, unused_variables, non_camel_case_types)]
#[cfg(feature = "std")]
use tonic::{Request, Response, Status};
#[cfg(feature = "std")]
use tokio_stream::Stream;
#[cfg(feature = "std")]
use std::pin::Pin;
#[cfg(feature = "std")]
use std::sync::Arc;
#[cfg(feature = "std")]
use std::task::{Context, Poll};
#[cfg(feature = "std")]
use std::future::Future;
#[cfg(feature = "std")]
use tonic::body::BoxBody;
#[cfg(feature = "std")]
use tower::Service;
#[cfg(feature = "std")]
use futures_util::StreamExt;
#[cfg(feature = "std")]
use http_body_util::BodyExt;
#[cfg(feature = "std")]
use http_body::Body;
#[cfg(feature = "std")]
use crate::{BufferPool, StatusBody};
#[cfg(feature = "std")]
#[async_trait::async_trait]
pub trait InteropService: Send + Sync + 'static {
async fn unary_call(&self, request: Request<OwnedUnaryRequest>) -> std::result::Result<Response<OwnedUnaryResponse>, Status>;
async fn streaming_call(&self, request: Request<OwnedStreamingRequest>) -> std::result::Result<Response<Pin<Box<dyn Stream<Item = std::result::Result<OwnedStreamingResponse, Status>> + Send>>>, Status>;
}
#[cfg(feature = "std")]
#[derive(Clone)]
pub struct InteropServiceServer {
inner: Arc<dyn InteropService>,
pool: Arc<BufferPool>,
}
#[cfg(feature = "std")]
impl InteropServiceServer {
pub fn new(inner: Arc<dyn InteropService>, pool: Arc<BufferPool>) -> Self {
Self { inner, pool }
}
}
#[cfg(feature = "std")]
impl tonic::server::NamedService for InteropServiceServer {
const NAME: &'static str = "interop.InteropService";
}
#[cfg(feature = "std")]
impl Service<http::Request<BoxBody>> for InteropServiceServer {
type Response = http::Response<BoxBody>;
type Error = std::convert::Infallible;