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DEV: atomic strength for queues

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hoo2
2021-09-30 19:19:44 +03:00
parent d2f8165ec6
commit d9da3917a9
6 changed files with 139 additions and 41 deletions
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include/core/ring_iterator.h
+16 -6
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@@ -293,9 +293,14 @@ class ring_iterator<Iter_t, N, true> {
return *this;
}
constexpr ring_iterator operator++(int) noexcept {
ring_iterator it = *this;
this->operator ++();
return it;
ring_iterator ret = *this;
Iter_t itnew, it = iter_.load(std::memory_order_acquire);
do {
itnew = it;
if (static_cast<size_t>(++itnew - base_) >= N)
itnew = base_;
} while (!iter_.compare_exchange_weak(it, itnew, std::memory_order_acq_rel));
return ret;
}
//! @}
@@ -312,9 +317,14 @@ class ring_iterator<Iter_t, N, true> {
return *this;
}
constexpr ring_iterator operator--(int) noexcept {
ring_iterator it = *this;
this->operator --();
return it;
ring_iterator ret = *this;
Iter_t itnew, it = iter_.load(std::memory_order_acquire);
do {
itnew = it;
if (--itnew < base_)
itnew = base_ + N -1;
} while (!iter_.compare_exchange_weak(it, itnew, std::memory_order_acq_rel));
return ret;
}
//! @}