Summary: Boxed bytes slices (e.g., `Box<[u8]>`, `Rc<[u8]>`) are not very ergonomic to use and are somewhat unusual in Rust code. Use the more common and easier to use `Bytes` type instead. Since this type supports shallow, referenced-counted copies, there shouldn't be any new O(n) copying behavior compared to `Rc<[u8]>`.
Reviewed By: markbt
Differential Revision: D13754730
fbshipit-source-id: d5fbc8e39c84c56d30174f4bb194ee21a14bf944
Summary:
`test-check-fix-code.t` was failing due to copyright header missing
from certain files. This commit fixes the files by running
```
contrib/fix-code.py FILE
```
as suggested in the failure message.
Reviewed By: DurhamG
Differential Revision: D13538506
fbshipit-source-id: d8063c9a0e665377a9976abeccb68fbef6781950
Summary:
The `pybuf` provides a way to read `bytes`, `bytearray`, some `buffer` types in
a zero-copy way. The main benefit is to use same code to support different
input types. It's copied to a couple of places. Let's move it to `cpython-ext`.
Reviewed By: DurhamG
Differential Revision: D13516206
fbshipit-source-id: f58881c4bfe651a6fdb84cf317a74c3c8d7a4961
Summary: Make it possible to write content directly into a PyBytes buffer.
Reviewed By: DurhamG
Differential Revision: D13528202
fbshipit-source-id: 8c0a4ed030439a8dc40cdfbd72b1f6734a8b2036
Summary:
I need to convert `Vec<u8>` to a Python object in a zero-copy way for rustlz4
performacne.
Assuming Python and Rust use the same memory allocator, it's possible to transfer
the control of a malloc-ed pointer from Rust to Python. Use this to implement
zero-copy. PyByteArrayObject is chosen because its struct contains such a pointer.
PyBytes cannot be used as it embeds the bytes, without using a pointer.
Sadly there are no CPython APIs to do this job. So we have to write to the raw
structures. That means the code will crash if python is replaced by
python-debug (due to Python object header change). However, that seems less an
issue given the performance wins. If python-debug does become a problem, we can
try vendoring libpython directly.
I didn't implement a feature-rich `PyByteArray` Rust object. It's not easy to
do so outside the cpython crate. Most helper macros to declare types cannot be
reused, because they refer to `::python`, which is not available in the current
crate.
Reviewed By: DurhamG
Differential Revision: D13516209
fbshipit-source-id: 9aa089b309beb71d4d21f6c63fcb97dbc798b5f8
