1# @ajax/mesh-abi-pipe-hash
2
3Pipe hashes: a record's position-mixed sum and an inbox type's FNV-1a 32.
4
5Part of the mesh contract: the memory, control, snapshot and peer protocols shared by meshd, its GPU
6programs (CUDA kernels, wasm lanes, native workers) and the tools. Every side compiles the same
7definitions, so an offset can never disagree.
8
9```c
10#include "mesh/abi/pipe_hash.h"
11```
12
13## Ported from
14
15[alpha-rust-mesh](https://github.com/rsafier/alpha-rust-mesh) (Richard Safier, MIT): crates/mesh-abi/src/v2/pipe.rs (sum_part, rec_sum, pos_mix, rec_sum_at, type_hash).
16
17## Device code
18
19The header is freestanding (`<stdint.h>`, `<stddef.h>`, `<stdbool.h>` only): it compiles for the host, `nvptx64-nvidia-cuda` and `wasm32`. Functions the Rust marks `const fn` are `static inline` here.
20
21## Tests
22
23- `tests/golden.c`: its functions against 76 vectors computed by the Rust on the same inputs
24
25## Licence
26
27MIT. See the repository's LICENSE.