8000 gh-115103: Implement delayed memory reclamation (QSBR) by colesbury · Pull Request #115180 · python/cpython · GitHub
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gh-115103: Implement delayed memory reclamation (QSBR) #115180

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Merged
merged 9 commits into from
Feb 16, 2024
Merged

gh-115103: Implement delayed memory reclamation (QSBR) #115180

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ede08ee
gh-115103: Implement delayed memory reclamation (QSBR)
colesbury Feb 2, 2024
a33b739
Fix default build
colesbury Feb 8, 2024
39e3954
Mark function as static
colesbury Feb 8, 2024
f1c3740
Fix indentation in qsbr.c
colesbury Feb 8, 2024
35cbc0e
Merge branch 'main' into gh-115103-qsbr
colesbury Feb 12, 2024
b03c5ca
Merge branch 'main' into gh-115103-qsbr
colesbury Feb 14, 2024
94a95d5
Fix potential deadlock and other changes from review
colesbury Feb 15, 2024
69d5669
Add comment about QSBR_LT/QSBR_LEQ
colesbury Feb 15, 2024
be441dc
Merge branch 'main' into gh-115103-qsbr
colesbury Feb 16, 2024
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Add comment about QSBR_LT/QSBR_LEQ
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@colesbury
colesbury committed Feb 15, 2024
commit 69d56690165e9992429e5371298aded06ab8423e
4 changes: 3 additions & 1 deletion Python/qsbr.c
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Original file line number Diff line number Diff line change
Expand Up @@ -38,7 +38,9 @@
#include "pycore_pystate.h" // _PyThreadState_GET()


// Wrap-around safe comparison
// Wrap-around safe comparison. This is a holdover from the FreeBSD
// implementation, which uses 32-bit sequence numbers. We currently use 64-bit
// sequence numbers, so wrap-around is unlikely.
#define QSBR_LT(a, b) ((int64_t)((a)-(b)) < 0)
#define QSBR_LEQ(a, b) ((int64_t)((a)-(b)) <= 0)

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