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chain: add CChain::IsTipRecent helper

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Factor the chain tip work/recency check out of `ChainstateManager::IsInitialBlockDownload()` into a reusable `CChain::IsTipRecent()` helper, and annotate it as requiring `cs_main` since it's reading mutable state.

Also introduce a local `chainman_ref` in the kernel import-blocks wrapper to reduce repetition and keep follow-up diffs small.

`IsInitialBlockDownload` returns were also unified to make the followup move clean.

Co-authored-by: Patrick Strateman <patrick.strateman@gmail.com>
Co-authored-by: Martin Zumsande <mzumsande@gmail.com>
This commit is contained in:
Lőrinc
2026-01-11 23:56:21 +01:00
parent 8d531c6210
commit b9c0ab3b75
3 changed files with 15 additions and 18 deletions
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21
src/validation.cpp
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@@ -1947,25 +1947,12 @@ void Chainstate::InitCoinsCache(size_t cache_size_bytes)
bool ChainstateManager::IsInitialBlockDownload() const
{
// Optimization: pre-test latch before taking the lock.
if (!m_cached_is_ibd.load(std::memory_order_relaxed))
return false;
if (!m_cached_is_ibd.load(std::memory_order_relaxed)) return false;
LOCK(cs_main);
if (!m_cached_is_ibd.load(std::memory_order_relaxed))
return false;
if (m_blockman.LoadingBlocks()) {
return true;
}
CChain& chain{ActiveChain()};
if (chain.Tip() == nullptr) {
return true;
}
if (chain.Tip()->nChainWork < MinimumChainWork()) {
return true;
}
if (chain.Tip()->Time() < Now<NodeSeconds>() - m_options.max_tip_age) {
return true;
}
if (!m_cached_is_ibd.load(std::memory_order_relaxed)) return false;
if (m_blockman.LoadingBlocks()) return true;
if (!ActiveChain().IsTipRecent(MinimumChainWork(), m_options.max_tip_age)) return true;
LogInfo("Leaving InitialBlockDownload (latching to false)");
m_cached_is_ibd.store(false, std::memory_order_relaxed);
return false;