Revert "core: special-case deleter for raw memory"

This reverts commit f75d1822cc.

core/deleter.hh

@@ -6,23 +6,17 @@
 #define DELETER_HH_
 
 #include <memory>
-#include <cstdlib>
-#include <type_traits>
 
 class deleter {
 public:
     struct impl;
-    struct raw_object_tag {};
 private:
-    // if bit 0 set, point to object to be freed directly.
     impl* _impl = nullptr;
 public:
     deleter() = default;
     deleter(const deleter&) = delete;
     deleter(deleter&& x) : _impl(x._impl) { x._impl = nullptr; }
     explicit deleter(impl* i) : _impl(i) {}
-    deleter(raw_object_tag tag, void* object)
-        : _impl(from_raw_object(object)) {}
     ~deleter();
     deleter& operator=(deleter&& x);
     deleter& operator=(deleter&) = delete;
@@ -36,19 +30,6 @@ public:
         this->~deleter();
         new (this) deleter(i);
     }
-private:
-    bool is_raw_object() const {
-        auto x = reinterpret_cast<uintptr_t>(_impl);
-        return x & 1;
-    }
-    void* to_raw_object() const {
-        auto x = reinterpret_cast<uintptr_t>(_impl);
-        return reinterpret_cast<void*>(x & ~uintptr_t(1));
-    }
-    impl* from_raw_object(void* object) {
-        auto x = reinterpret_cast<uintptr_t>(object);
-        return reinterpret_cast<impl*>(x | 1);
-    }
 };
 
 struct deleter::impl {
@@ -60,10 +41,6 @@ struct deleter::impl {
 
 inline
 deleter::~deleter() {
-    if (is_raw_object()) {
-        std::free(to_raw_object());
-        return;
-    }
     if (_impl && --_impl->refs == 0) {
         delete _impl;
     }
@@ -92,29 +69,14 @@ make_deleter(deleter next, Deleter d) {
     return deleter(new lambda_deleter_impl<Deleter>(std::move(next), std::move(d)));
 }
 
-struct free_deleter_impl final : deleter::impl {
-    void* obj;
-    free_deleter_impl(void* obj) : impl(deleter()), obj(obj) {}
-    virtual ~free_deleter_impl() override { std::free(obj); }
-};
-
 inline
 deleter
 deleter::share() {
     if (!_impl) {
         return deleter();
     }
-    if (is_raw_object()) {
-        _impl = new free_deleter_impl(to_raw_object());
-    }
     ++_impl->refs;
     return deleter(_impl);
 }
 
-inline
-deleter
-make_free_deleter(void* obj) {
-    return deleter(deleter::raw_object_tag(), obj);
-}
-
 #endif /* DELETER_HH_ */