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authorMarcoFalke <falke.marco@gmail.com>2019-05-23 19:17:09 +0200
committerMarcoFalke <falke.marco@gmail.com>2019-06-07 11:06:00 +0200
commitfa0c9dbf9156d64a4b9bff858da97825369a9134 (patch)
treee54ed5513a012acbe92cb553814f30ace3e54f16 /src
parentd0f81a96d9c158a9226dc946bdd61d48c4d42959 (diff)
downloadbitcoin-fa0c9dbf9156d64a4b9bff858da97825369a9134.tar.xz
txpool: Make nTransactionsUpdated atomic
Diffstat (limited to 'src')
-rw-r--r--src/rpc/mining.cpp1
-rw-r--r--src/txmempool.cpp6
-rw-r--r--src/txmempool.h9
3 files changed, 8 insertions, 8 deletions
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index 477f05f46c..ba5e0cdf64 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -480,6 +480,7 @@ static UniValue getblocktemplate(const JSONRPCRequest& request)
if (g_best_block_cv.wait_until(lock, checktxtime) == std::cv_status::timeout)
{
// Timeout: Check transactions for update
+ // without holding ::mempool.cs to avoid deadlocks
if (mempool.GetTransactionsUpdated() != nTransactionsUpdatedLastLP)
break;
checktxtime += std::chrono::seconds(10);
diff --git a/src/txmempool.cpp b/src/txmempool.cpp
index cac7beb6a1..2f4e5fee4b 100644
--- a/src/txmempool.cpp
+++ b/src/txmempool.cpp
@@ -322,8 +322,8 @@ void CTxMemPoolEntry::UpdateAncestorState(int64_t modifySize, CAmount modifyFee,
assert(int(nSigOpCostWithAncestors) >= 0);
}
-CTxMemPool::CTxMemPool(CBlockPolicyEstimator* estimator) :
- nTransactionsUpdated(0), minerPolicyEstimator(estimator)
+CTxMemPool::CTxMemPool(CBlockPolicyEstimator* estimator)
+ : nTransactionsUpdated(0), minerPolicyEstimator(estimator)
{
_clear(); //lock free clear
@@ -341,13 +341,11 @@ bool CTxMemPool::isSpent(const COutPoint& outpoint) const
unsigned int CTxMemPool::GetTransactionsUpdated() const
{
- LOCK(cs);
return nTransactionsUpdated;
}
void CTxMemPool::AddTransactionsUpdated(unsigned int n)
{
- LOCK(cs);
nTransactionsUpdated += n;
}
diff --git a/src/txmempool.h b/src/txmempool.h
index ce0b762336..59514a945b 100644
--- a/src/txmempool.h
+++ b/src/txmempool.h
@@ -6,12 +6,13 @@
#ifndef BITCOIN_TXMEMPOOL_H
#define BITCOIN_TXMEMPOOL_H
+#include <atomic>
+#include <map>
#include <memory>
#include <set>
-#include <map>
-#include <vector>
-#include <utility>
#include <string>
+#include <utility>
+#include <vector>
#include <amount.h>
#include <coins.h>
@@ -443,7 +444,7 @@ class CTxMemPool
{
private:
uint32_t nCheckFrequency GUARDED_BY(cs); //!< Value n means that n times in 2^32 we check.
- unsigned int nTransactionsUpdated; //!< Used by getblocktemplate to trigger CreateNewBlock() invocation
+ std::atomic<unsigned int> nTransactionsUpdated; //!< Used by getblocktemplate to trigger CreateNewBlock() invocation
CBlockPolicyEstimator* minerPolicyEstimator;
uint64_t totalTxSize; //!< sum of all mempool tx's virtual sizes. Differs from serialized tx size since witness data is discounted. Defined in BIP 141.