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| author | Brett Simmers <swtaarrs@users.noreply.github.com> | 2024-02-20 14:57:48 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2024-02-20 14:57:48 (GMT) |
| commit | 0749244d13412d7cb5b53d834f586f2198f5b9a6 (patch) | |
| tree | 06387c5b41cd14cdf230f71eab6fd92873c3d5a9 /Include/cpython | |
| parent | e71468ba4f5fb2da0cefe9e923b01811cb53fb5f (diff) | |
| download | cpython-0749244d13412d7cb5b53d834f586f2198f5b9a6.zip cpython-0749244d13412d7cb5b53d834f586f2198f5b9a6.tar.gz cpython-0749244d13412d7cb5b53d834f586f2198f5b9a6.tar.bz2 | |
gh-112175: Add `eval_breaker` to `PyThreadState` (#115194)
This change adds an `eval_breaker` field to `PyThreadState`. The primary
motivation is for performance in free-threaded builds: with thread-local eval
breakers, we can stop a specific thread (e.g., for an async exception) without
interrupting other threads.
The source of truth for the global instrumentation version is stored in the
`instrumentation_version` field in PyInterpreterState. Threads usually read the
version from their local `eval_breaker`, where it continues to be colocated
with the eval breaker bits.
Diffstat (limited to 'Include/cpython')
| -rw-r--r-- | Include/cpython/pystate.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Include/cpython/pystate.h b/Include/cpython/pystate.h index b99450a..ac7ff83 100644 --- a/Include/cpython/pystate.h +++ b/Include/cpython/pystate.h @@ -68,6 +68,11 @@ struct _ts { PyThreadState *next; PyInterpreterState *interp; + /* The global instrumentation version in high bits, plus flags indicating + when to break out of the interpreter loop in lower bits. See details in + pycore_ceval.h. */ + uintptr_t eval_breaker; + struct { /* Has been initialized to a safe state. |