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WIP snapshot: std::get_deleter experiment.

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Ralf W. Grosse-Kunstleve 2021-06-15 22:33:36 -07:00 committed by Ralf W. Grosse-Kunstleve
parent e80a1f0617
commit 459301d9a8
1 changed files with 14 additions and 9 deletions
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23
include/pybind11/detail/smart_holder_poc.h
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@ -60,8 +60,12 @@ struct guarded_operator_call {
std::shared_ptr<bool> flag_ptr;
explicit guarded_operator_call(std::shared_ptr<bool> armed_flag_ptr)
: flag_ptr{armed_flag_ptr} {}
virtual void operator()(void *) { std::terminate(); };
virtual ~guarded_operator_call() = default;
virtual void operator()(void *) = 0;
virtual ~guarded_operator_call() = default;
guarded_operator_call(guarded_operator_call &&) = default;
guarded_operator_call(guarded_operator_call &) = delete;
guarded_operator_call &operator=(guarded_operator_call &&) = delete;
guarded_operator_call &operator=(const guarded_operator_call &) = delete;
};
template <typename T>
@ -111,11 +115,6 @@ struct guarded_custom_deleter : guarded_operator_call {
if (*flag_ptr)
D()((T *) raw_ptr);
}
guarded_custom_deleter(guarded_custom_deleter &&) = default;
guarded_custom_deleter(guarded_custom_deleter &) = delete;
guarded_custom_deleter &operator=(guarded_custom_deleter &&) = delete;
guarded_custom_deleter &operator=(const guarded_custom_deleter &) = delete;
};
template <typename T>
@ -307,11 +306,17 @@ struct smart_holder {
smart_holder hld;
hld.rtti_uqp_del = &typeid(D);
hld.vptr_is_using_builtin_delete = is_std_default_delete<T>(*hld.rtti_uqp_del);
guarded_operator_call *vptr_del = nullptr;
if (hld.vptr_is_using_builtin_delete) {
hld.vptr.reset(unq_ptr.get(), make_guarded_builtin_delete<T>(true));
hld.vptr.reset(unq_ptr.get(),
guarded_builtin_delete<T>(hld.vptr_deleter_armed_flag_ptr));
vptr_del = std::get_deleter<guarded_builtin_delete<T>>(hld.vptr);
} else {
hld.vptr.reset(unq_ptr.get(), make_guarded_custom_deleter<T, D>(true));
hld.vptr.reset(unq_ptr.get(),
guarded_custom_deleter<T, D>(hld.vptr_deleter_armed_flag_ptr));
vptr_del = std::get_deleter<guarded_custom_deleter<T, D>>(hld.vptr);
}
assert(vptr_del != nullptr);
unq_ptr.release();
hld.is_populated = true;
return hld;