diff options
| -rw-r--r-- | src/main.cpp | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/main.cpp b/src/main.cpp index d2b7c6bc4f..aed8a7c421 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -37,6 +37,7 @@ #include "validationinterface.h" #include "versionbits.h" +#include <atomic> #include <sstream> #include <boost/algorithm/string/replace.hpp> @@ -1574,18 +1575,24 @@ CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams) bool IsInitialBlockDownload() { const CChainParams& chainParams = Params(); + + // Once this function has returned false, it must remain false. + static std::atomic<bool> latchToFalse{false}; + // Optimization: pre-test latch before taking the lock. + if (latchToFalse.load(std::memory_order_relaxed)) + return false; + LOCK(cs_main); + if (latchToFalse.load(std::memory_order_relaxed)) + return false; if (fImporting || fReindex) return true; if (fCheckpointsEnabled && chainActive.Height() < Checkpoints::GetTotalBlocksEstimate(chainParams.Checkpoints())) return true; - static bool lockIBDState = false; - if (lockIBDState) - return false; bool state = (chainActive.Height() < pindexBestHeader->nHeight - 24 * 6 || std::max(chainActive.Tip()->GetBlockTime(), pindexBestHeader->GetBlockTime()) < GetTime() - nMaxTipAge); if (!state) - lockIBDState = true; + latchToFalse.store(true, std::memory_order_relaxed); return state; } |