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Merge branch 'pybind:master' into master

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Steve R. Sun 2024-07-17 10:12:00 +08:00 committed by GitHub
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11
include/pybind11/gil_safe_call_once.h
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@ -8,6 +8,10 @@
#include <cassert> #include <cassert>
#include <mutex> #include <mutex>
#ifdef Py_GIL_DISABLED
# include <atomic>
#endif
PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE) PYBIND11_NAMESPACE_BEGIN(PYBIND11_NAMESPACE)
// Use the `gil_safe_call_once_and_store` class below instead of the naive // Use the `gil_safe_call_once_and_store` class below instead of the naive
@ -82,7 +86,12 @@ public:
private: private:
alignas(T) char storage_[sizeof(T)] = {}; alignas(T) char storage_[sizeof(T)] = {};
std::once_flag once_flag_ = {}; std::once_flag once_flag_ = {};
bool is_initialized_ = false; #ifdef Py_GIL_DISABLED
std::atomic_bool
#else
bool
#endif
is_initialized_{false};
// The `is_initialized_`-`storage_` pair is very similar to `std::optional`, // The `is_initialized_`-`storage_` pair is very similar to `std::optional`,
// but the latter does not have the triviality properties of former, // but the latter does not have the triviality properties of former,
// therefore `std::optional` is not a viable alternative here. // therefore `std::optional` is not a viable alternative here.