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gh-111924: Use PyMutex for runtime global locks.

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This replaces some usages of PyThread_type_lock with PyMutex, which
does not require memory allocation to initialize.
This commit is contained in:
Sam Gross 2023-11-16 16:41:21 -05:00
parent 974847be44
commit 628f6eb003
18 changed files with 91 additions and 251 deletions
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4
Objects/unicodeobject.c
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@ -1904,7 +1904,7 @@ _PyUnicode_FromId(_Py_Identifier *id)
if (index < 0) {
struct _Py_unicode_runtime_ids *rt_ids = &interp->runtime->unicode_state.ids;
PyThread_acquire_lock(rt_ids->lock, WAIT_LOCK);
PyMutex_Lock(&rt_ids->mutex);
// Check again to detect concurrent access. Another thread can have
// initialized the index while this thread waited for the lock.
index = _Py_atomic_load_ssize(&id->index);
@ -1914,7 +1914,7 @@ _PyUnicode_FromId(_Py_Identifier *id)
rt_ids->next_index++;
_Py_atomic_store_ssize(&id->index, index);
}
PyThread_release_lock(rt_ids->lock);
PyMutex_Unlock(&rt_ids->mutex);
}
assert(index >= 0);