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Merge #12743: Fix csBestBlock/cvBlockChange waiting in rpc/mining

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4a6c0e3dcf Modernize best block mutex/cv/hash variable naming (Pieter Wuille)
45dd135039 Fix csBestBlock/cvBlockChange waiting in rpc/mining (Pieter Wuille)

Pull request description:

  This is an alternative to #11694.

  It reintroduces a uint256 variable with the best block hash, protected by csBestBlock, and only updated while holding it.

  Also rename the involved variable to modern guidelines, as there are very few uses.

Tree-SHA512: 826a86c7d3cee7fe49f99f4398ae99e81cb0563197eaeba77306a3ca6072b67cdb932bc35720fc0f99c2a57b218efa029d0b8bdfb240591a629b2e90efa3199d
This commit is contained in:
Pieter Wuille
2018-04-12 18:13:49 -07:00
parent 8480d41e0f 4a6c0e3dcf
commit 4ba6da5574
4 changed files with 15 additions and 9 deletions
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11
src/validation.cpp
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@@ -202,8 +202,9 @@ CCriticalSection cs_main;
BlockMap& mapBlockIndex = g_chainstate.mapBlockIndex;
CChain& chainActive = g_chainstate.chainActive;
CBlockIndex *pindexBestHeader = nullptr;
CWaitableCriticalSection csBestBlock;
CConditionVariable cvBlockChange;
CWaitableCriticalSection g_best_block_mutex;
CConditionVariable g_best_block_cv;
uint256 g_best_block;
int nScriptCheckThreads = 0;
std::atomic_bool fImporting(false);
std::atomic_bool fReindex(false);
@@ -2204,7 +2205,11 @@ void static UpdateTip(const CBlockIndex *pindexNew, const CChainParams& chainPar
// New best block
mempool.AddTransactionsUpdated(1);
cvBlockChange.notify_all();
{
WaitableLock lock(g_best_block_mutex);
g_best_block = pindexNew->GetBlockHash();
g_best_block_cv.notify_all();
}
std::vector<std::string> warningMessages;
if (!IsInitialBlockDownload())