These are new and part of the stable API as of v3.12.0a6.
PyErr_Fetch(), PyErr_Restore(), and PyErr_NormalizeException()
were simultaneously deprecated in favor of these.
python/cpython@feec49c407
3203: support ordering magic methods for `#[pyclass]` r=adamreichold a=davidhewitt
Closes#2089
This adds `__lt__`, `__le__`, `__eq__`, `__ne__`, `__gt__`, and `__ge__` as per the Python implementations of what we call `__richcmp__`.
There's a UI test confirming that the user cannot implement split forms and `__richcmp__` simultaneously.
There's also a benchmark comparing implementing these split methods against using `__richcmp__`. I couldn't see a meaningful performance difference, so I'm tempted to deprecate `__richcmp__`, given that's not a magic method which exists in Python. Potentially we can provide options such as the opt-in `#[pyclass(eq, ord)]` to avoid boilerplate for people who don't want to implement six different methods.
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
3198: Add abi3 + num_bigint conversion r=davidhewitt a=youknowone
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Fix#3196
Co-authored-by: Jeong YunWon <jeong@youknowone.org>
Python classes that were not `complex` but implemented the `__complex__`
magic would have that method called via `PyComplex_AsCComplex` when
running against the full API, but the limited-API version
`PyComplex_RealAsDouble` does not attempt this conversion. If the input
object is not already complex, we can call the magic before proceeding.
3168: Do not apply deferred ref count updates and prevent the GIL from being acquired inside of __traverse__ implementations. r=davidhewitt a=adamreichold
Closes#2301Closes#3165
3176: Prevent dropping unsendable classes on other threads. r=davidhewitt a=adamreichold
Continuing the discussed from https://github.com/PyO3/pyo3/pull/3169#issuecomment-1556571504 and https://github.com/PyO3/pyo3/pull/3169#issuecomment-1556661723:
We already have checks in place to avoid borrowing these classes on other threads but it was still possible to send them to another thread and drop them there (while holding the GIL).
This change avoids running the `Drop` implementation in such a case even though Python will still free the underlying memory. This might leak resources owned by the object, but it avoids undefined behaviour due to access the unsendable type from another thread.
This does assume that the object was not unsafely integrated into an intrusive data structures which still point to the now freed memory. In that case, the only recourse would be to abort the process as freeing the memory is unavoidable when the tp_dealloc slot is called. (And moving it elsewhere into a new allocation would still break any existing pointers.)
Co-authored-by: Adam Reichold <adam.reichold@t-online.de>
We already have checks in place to avoid borrowing these classes on other
threads but it was still possible to send them to another thread and drop them
there (while holding the GIL).
This change avoids running the `Drop` implementation in such a case even though
Python will still free the underlying memory. This might leak resources owned by
the object, but it avoids undefined behaviour due to access the unsendable type
from another thread.
This does assume that the object was not unsafely integrated into an intrusive
data structures which still point to the now freed memory. In that case, the
only recourse would be to abort the process as freeing the memory is unavoidable
when the tp_dealloc slot is called. (And moving it elsewhere into a new
allocation would still break any existing pointers.)
3029: use dynamic trampoline for all getters and setters r=adamreichold a=davidhewitt
This is an extension to the "trampoline" changes made in #2705 to re-use a single trampoline for all `#[getter]`s (and similar for all `#[setters]`). It works by setting the currently-unused `closure` member of the `ffi::PyGetSetDef` structure to point at a new `struct GetSetDefClosure` which contains function pointers to the `getter` / `setter` implementations.
A universal trampoline for all `getter`, for example, then works by reading the actual getter implementation out of the `GetSetDefClosure`.
Advantages of doing this:
- Very minimal simplification to the macro code / generated code size. It made a 4.4% reduction to `test_getter_setter` generated size, which is an exaggerated result as most code will probably have lots of bulk that isn't just the macro code.
Disadvantages:
- Additional level of complexity in the `getter` and `setter` trampolines and accompanying code.
- To keep the `GetSetDefClosure` objects alive, I've added them to the static `LazyTypeObject` inner.
- Very slight performance overhead at runtime (shouldn't be more than an additional pointer read). It's so slight I couldn't measure it.
Overall I'm happy to either merge or close this based on what reviewers think!
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
2981: Remove 0.17 deprecations r=adamreichold,davidhewitt a=davidhewitt
Since #2980 starts a breaking change for 0.19, let's also clean up all 0.17's deprecations.
I've removed `Python::acquire_gil` in its own commit, as that was a reasonably chunky removal.
Co-authored-by: Adam Reichold <adam.reichold@t-online.de>
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
3142: Do not store return values in locals so that holders benefit from lifetime extension for temporaries. r=davidhewitt a=adamreichold
Closes#3138
Co-authored-by: Adam Reichold <adam.reichold@t-online.de>
3004: Unwrap dynamic error types when inner is simple `PyErr` r=davidhewitt,adamreichold,mejrs a=BlueGlassBlock
This is the first part of suggested improvements in #2998.
This change will make bubbled `PyErr` wrapped in `eyre::Report` / `anyhow::Error` bubble up unchanged, instead of being wrapped in a `PyRuntimeError`.
Co-authored-by: BlueGlassBlock <blueglassblock@outlook.com>
2980: support `text_signature` on `#[new]` r=adamreichold a=davidhewitt
Closes#2866
This is a breaking change for 0.19.0, because it starts autogenerating `text_signature` for `#[new]`. This could affect runtime behaviour if the user is relying on the class docs at runtime for some reason.
Guide & tests all updated accordingly.
`#[pyclass(text_signature = "...")]` is deprecated by this PR, however if it's set, it will be used in preference to `#[new]`.
(The signature / `text_signature` from `#[new]` will simply be ignored in this case. I figure that when users fix their deprecation warnings by removing `#[pyclass(text_signature = "...")]` then the `#[new]` signatures will start flowing properly, and this is good enough.)
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
Co-authored-by: Adam Reichold <adam.reichold@t-online.de>
