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bpo-28254: Add a C-API for controlling the state of the garbage collector #25687

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Merged
vstinner merged 17 commits into from
Apr 28, 2021
Merged

bpo-28254: Add a C-API for controlling the state of the garbage collector #25687

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6229a31
bpo-28254: Add a C-API for controlling the state of the garbage colle…
scoder Apr 28, 2021
bfbadb9
bpo-28254: Improve markup and add a What's New entry.
scoder Apr 28, 2021
f41d269
Apply suggestions from code review
pablogsal Apr 28, 2021
56465a9
bpo-28254: Return the previous GC state from the Enable/Disable funct…
scoder Apr 28, 2021
7b6e320
Update Modules/_testcapimodule.c
pablogsal Apr 28, 2021
b7e4ee3
Update Modules/_testcapimodule.c
pablogsal Apr 28, 2021
4e11560
Update Modules/_testcapimodule.c
pablogsal Apr 28, 2021
e5f0077
bpo-28254: Formatting.
scoder Apr 28, 2021
c64aa42
bpo-28254: Move new functions to a better place (not cutting into the…
scoder Apr 28, 2021
cbee918
Remove an incorrect part of a comment: PyGC_Collect() actually does n…
scoder Apr 28, 2021
0f7e608
bpo-28254: Add documentation for the PyGC_*() functions.
scoder Apr 28, 2021
80c3625
bpo-28254: Add new PyGC_*() functions to the stable ABI list.
scoder Apr 28, 2021
25fb2aa
bpo-28254: Apply suggestions from doc review.
scoder Apr 28, 2021
10ad929
Apply suggestions from doc review
scoder Apr 28, 2021
1ffe937
Add a word on how PyGC_Collect() and gc.collect() differ.
scoder Apr 28, 2021
d517665
Fix version marker.
scoder Apr 28, 2021
84fb2af
Fix version marker (II).
scoder Apr 28, 2021
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bpo-28254: Formatting.
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@scoder
scoder committed Apr 28, 2021
commit e5f0077f7575d10fe91934ac01441fd9d6b47868
20 changes: 15 additions & 5 deletions Modules/_testcapimodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -153,23 +153,29 @@ test_gc_control(PyObject *self, PyObject *Py_UNUSED(ignored))

old_state = PyGC_Enable();
msg = "Enable(1)";
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@vstinner vstinner Apr 28, 2021

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Bugs are unlikely. IMO using assert() is good enough for _testcapi tests. You can leave the code as it is ;-)

See for example test_refcount_funcs() which uses assert().

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@scoder scoder Apr 28, 2021

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I was thinking that assertions can be compiled out, which is decidedly not intended here.

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@vstinner vstinner Apr 28, 2021

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In general yes, but _testcapimodule.c starts with:

/* Always enable assertions */
#undef NDEBUG

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@scoder scoder Apr 28, 2021

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Good to know! I'd keep the test as it is though. It doesn't really hurt, I think.

if (old_state != orig_enabled) goto failed;
if (old_state != orig_enabled) {
goto failed;
}
msg = "IsEnabled(1)";
if (!PyGC_IsEnabled()) {
goto failed;
}

old_state = PyGC_Disable();
msg = "disable(2)";
if (!old_state) goto failed;
if (!old_state) {
goto failed;
}
msg = "IsEnabled(2)";
if (PyGC_IsEnabled()) {
goto failed;
}

old_state = PyGC_Enable();
msg = "enable(3)";
if (old_state) goto failed;
if (old_state) {
goto failed;
}
msg = "IsEnabled(3)";
if (!PyGC_IsEnabled()) {
goto failed;
Expand All @@ -178,9 +184,13 @@ test_gc_control(PyObject *self, PyObject *Py_UNUSED(ignored))
if (!orig_enabled) {
old_state = PyGC_Disable();
msg = "disable(4)";
if (old_state) goto failed;
if (old_state) {
goto failed;
}
msg = "IsEnabled(4)";
if (PyGC_IsEnabled()) goto failed;
if (PyGC_IsEnabled()) {
goto failed;
}
}

Py_RETURN_NONE;
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