23 lines
860 B
C++
23 lines
860 B
C++
template <typename T>
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class lock_free_queue {
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private:
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static void free_external_counter(counted_node_ptr& old_node_ptr)
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{
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node* const ptr = old_node_ptr.ptr;
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int const count_increase = old_node_ptr.external_count - 2;
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node_counter old_counter = ptr->count.load(std::memory_order_relaxed);
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node_counter new_counter;
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do {
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new_counter = old_counter;
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--new_counter.external_counters;
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new_counter.internal_count += count_increase;
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} while (!ptr->count.compare_exchange_strong(old_counter,
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new_counter,
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std::memory_order_acquire,
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std::memory_order_relaxed));
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if (!new_counter.internal_count && !new_counter.external_counters) {
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delete ptr;
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}
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}
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};
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