Cleanup object.h header

[vstinner]

BPO	39542
Nosy	@rhettinger, @pitrou, @vstinner, @encukou, @skrah, @ambv, @JimJJewett, @serhiy-storchaka
PRs	bpo-39542: Move object.h debug functions to internal C API #18331 bpo-39542: Simplify _Py_NewReference() #18332 bpo-39542: Make _Py_NewReference() opaque in C API #18346 bpo-39542: Exclude trashcan from the limited C API #18362 bpo-39542: Make PyObject_INIT() opaque in limited C API #18363 bpo-39542: Convert PyType_Check() to static inline function #18364 bpo-39542: Define PyTypeObject earlier in object.h #18366 bpo-39542: Declare _Py_AddToAllObjects() in pycore_object.h #18368 bpo-39542: Document limited C API changes #18378 Revert "bpo-39542: Define PyTypeObject earlier in object.h (GH-18366)" #18384
Files	Screen Shot 2020-07-07 at 10.40.52 AM.png: Disassembly of math.dist() in 3.8 vs 3.9

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2020-07-08.08:30:06.202>
created_at = <Date 2020-02-03.15:42:01.002>
labels = ['expert-C-API', '3.9']
title = 'Cleanup object.h header'
updated_at = <Date 2020-07-11.17:52:28.975>
user = 'https://github.com/vstinner'

bugs.python.org fields:

activity = <Date 2020-07-11.17:52:28.975>
actor = 'Jim.Jewett'
assignee = 'none'
closed = True
closed_date = <Date 2020-07-08.08:30:06.202>
closer = 'vstinner'
components = ['C API']
creation = <Date 2020-02-03.15:42:01.002>
creator = 'vstinner'
dependencies = []
files = ['49303']
hgrepos = []
issue_num = 39542
keywords = ['patch']
message_count = 28.0
messages = ['361305', '361307', '361311', '361384', '361422', '361425', '361429', '361431', '361432', '361442', '361505', '372962', '372983', '372984', '372993', '372994', '372995', '373028', '373230', '373231', '373234', '373235', '373236', '373237', '373239', '373282', '373288', '373530']
nosy_count = 8.0
nosy_names = ['rhettinger', 'pitrou', 'vstinner', 'petr.viktorin', 'skrah', 'lukasz.langa', 'Jim.Jewett', 'serhiy.storchaka']
pr_nums = ['18331', '18332', '18346', '18362', '18363', '18364', '18366', '18368', '18378', '18384']
priority = None
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue39542'
versions = ['Python 3.9']

[vstinner]

In bpo-39489, I removed the COUNT_ALLOCS special build. The object.h header can now be cleaned up to simplify the code.

[vstinner]

New changeset 4b52416 by Victor Stinner in branch 'master':
bpo-39542: Move object.h debug functions to internal C API (GH-18331)
4b52416

[vstinner]

New changeset 49932fe by Victor Stinner in branch 'master':
bpo-39542: Simplify _Py_NewReference() (GH-18332)
49932fe

[vstinner]

New changeset 40e547d by Victor Stinner in branch 'master':
bpo-39542: Make _Py_NewReference() opaque in C API (GH-18346)
40e547d

[vstinner]

New changeset 0fa4f43 by Victor Stinner in branch 'master':
bpo-39542: Exclude trashcan from the limited C API (GH-18362)
0fa4f43

[vstinner]

New changeset f58bd7c by Victor Stinner in branch 'master':
bpo-39542: Make PyObject_INIT() opaque in limited C API (GH-18363)
f58bd7c

[vstinner]

New changeset 509dd90 by Victor Stinner in branch 'master':
bpo-39542: Convert PyType_Check() to static inline function (GH-18364)
509dd90

[vstinner]

New changeset 0e4e735 by Victor Stinner in branch 'master':
bpo-39542: Define PyTypeObject earlier in object.h (GH-18366)
0e4e735

[vstinner]

Ok, object.h looks much better now! I close the issue.