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Add a check for begin == end to allow users to supply an empty list to lockfree::stack::push #21

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Add a check for begin == end to allow users to supply an empty list to lockfree::stack::push #21

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5 changes: 5 additions & 0 deletions include/boost/lockfree/stack.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -243,6 +243,11 @@ class stack
template <bool Threadsafe, bool Bounded, typename ConstIterator>
tuple<node*, node*> prepare_node_list(ConstIterator begin, ConstIterator end, ConstIterator & ret)
{
if (begin == end) {
ret = begin;
return make_tuple<node*, node*>(NULL, NULL);
}

ConstIterator it = begin;
node * end_node = pool.template construct<Threadsafe, Bounded>(*it++);
if (end_node == NULL) {
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