Stop using cysignals .pxi files in interpreters

[jdemeyer]

Follow-up to #22806 and #22896: we should stop using the deprecated files cysignals/memory.pxi and cysignals/signals.pxi.

This deals with the auto-generated interpreters files. Besides changing the include to a cimport, we also clean up and optimize the memory allocation code a bit.

Depends on #23196

CC: @embray

Component: cython

Author: Jeroen Demeyer

Branch/Commit: be167ac

Reviewer: Travis Scrimshaw

Issue created by migration from https://trac.sagemath.org/ticket/23195

[jdemeyer]

Dependencies: #23196

[jdemeyer]

Branch: u/jdemeyer/stop_using_cysignals__pxi_files_in_interpreters

[jdemeyer]

Commit: be167ac

[jdemeyer]

New commits:

78abaae	Fix doctest parsing with triple quotes inside parentheses
be167ac	Stop using cysignals .pxi files in interpreters

[embray]

comment:4

I don't really know enough about the differences between the old and new APIs to really have an opinion about this, but it seems obvious and straightforward enough.

[jdemeyer]

comment:5

Replying to @embray:

I don't really know enough about the differences between the old and new APIs

The main goal here is getting rid of the of Cython include statements, which are semi-deprecated(*) by Cython upstream.

The change from sig_malloc to check_allocarray is just a minor clean-up which removes the need for the NULL check.

(*) They would like to deprecate include statements. However, there are some corner cases where include statements make sense, so they don't formally deprecate them. Instead, they just keep them working in the current state, rejecting any new features.

[tscrim]

Reviewer: Travis Scrimshaw

[tscrim]

comment:6

LGTM.

[jdemeyer]

Changed dependencies from #23196 to none

[jdemeyer]

comment:7

This doesn't strictly depend on #23196.

[jdemeyer]

Dependencies: #23196

[jdemeyer]

comment:8

Actually, it does depend since this branch contains the commit from #23196.

[vbraun]

Changed branch from u/jdemeyer/stop_using_cysignals__pxi_files_in_interpreters to be167ac