Comments (6)
You'll need to provide your own implementation of the Allocator
trait:
capnproto-rust/capnp/src/message.rs
Lines 370 to 404 in 20741d1
One way to do it would be to have a wrapper for a single &mut[u8]
. That would work simlarly to ScratchSpaceHeapAllocator
, except without the HeapAllocator
for when the segment fills up. (You would need to panic when the segment fills.)
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Thank you @dwrensha for the quick reply! I will have a look at this.
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I opened #441, which adds SingleSegmentAllocator
.
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Hi @dwrensha,
First, many thanks for the quick new release!
Unfortunately I still have issues to compile in my environment (no-std, no-alloc) something similar as the test case you added. The allocate_zeroed_vec() method returns a Vec which is not available, but it looks quite easy to fix, by passing to capnp::message::SingleSegmentAllocator::new() a reference to an aligned u8 slice.
The other problem I have seems harder to solve:
error[E0433]: failed to resolve: could not find
Builderin
message``
Indeed, the struct Builder is decorated with #[cfg(feature = "alloc")], so it is not available in my environment. We can't simply remove it since it depends on BuilderArenaImpl which uses a Vec.
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Oops!
We need a no-alloc version of BuilderArenaImpl
. The straightforward way to achieve that would be to hard code it to allow only one segment in the no-alloc case.
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I opened #442.
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Related Issues (20)
- Serializing message to &[u8] HOT 2
- Improve performance of Reader get_named HOT 4
- Primitive list panicks if the list type is `Void` HOT 1
- Null values for non active union members HOT 3
- Switch Allocator to act more like an owned arena HOT 8
- Reader fails with out of bounds pointer error when reading from compressed stream HOT 1
- Revert text setter ergonomics pessification; add raw_set methods HOT 6
- calculator example fails with java server: Cannot read capability pointer without capTable HOT 1
- c++.capnp compiles to unusable module name HOT 6
- How to send generated readers across threads HOT 3
- From bytes to TypedReader HOT 6
- Allowing construction of NoAllocSliceSegments with buffer and NoAllocBufferSegmentType HOT 7
- Kudos to builders of this Rust library - Every single one of you. HOT 3
- [Question]How to extract generic type values HOT 5
- capnp_rpc does not work on monoio HOT 4
- Dynamic parsing of fields may panic HOT 1
- traits.ListIter incorrectly implementing ExactSizeIterator HOT 1
- oc
- Using same schema file for both Rust and C++ HOT 1
- doc: read_message_from_flat_slice_no_alloc docstring bad autocomplete HOT 1
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