From 735d9b5362aeca34c0e62006986fe9d82c24ca08 Mon Sep 17 00:00:00 2001
From: Matt Corallo <git@bluematt.me>
Date: Wed, 8 Feb 2017 13:19:18 -0500
Subject: Use CScheduler for wallet flushing, remove ThreadFlushWalletDB

---
 src/wallet/walletdb.cpp | 45 ++++++++++++++++++++-------------------------
 1 file changed, 20 insertions(+), 25 deletions(-)

(limited to 'src/wallet/walletdb.cpp')

diff --git a/src/wallet/walletdb.cpp b/src/wallet/walletdb.cpp
index f894a365ac..ae95fc4f29 100644
--- a/src/wallet/walletdb.cpp
+++ b/src/wallet/walletdb.cpp
@@ -777,38 +777,33 @@ DBErrors CWalletDB::ZapWalletTx(vector<CWalletTx>& vWtx)
     return DB_LOAD_OK;
 }
 
-void ThreadFlushWalletDB()
+void MaybeFlushWalletDB()
 {
-    // Make this thread recognisable as the wallet flushing thread
-    RenameThread("bitcoin-wallet");
-
-    static bool fOneThread;
-    if (fOneThread)
+    static std::atomic<bool> fOneThread;
+    if (fOneThread.exchange(true)) {
         return;
-    fOneThread = true;
-    if (!GetBoolArg("-flushwallet", DEFAULT_FLUSHWALLET))
+    }
+    if (!GetBoolArg("-flushwallet", DEFAULT_FLUSHWALLET)) {
         return;
+    }
 
-    unsigned int nLastSeen = CWalletDB::GetUpdateCounter();
-    unsigned int nLastFlushed = CWalletDB::GetUpdateCounter();
-    int64_t nLastWalletUpdate = GetTime();
-    while (true)
-    {
-        MilliSleep(500);
+    static unsigned int nLastSeen = CWalletDB::GetUpdateCounter();
+    static unsigned int nLastFlushed = CWalletDB::GetUpdateCounter();
+    static int64_t nLastWalletUpdate = GetTime();
 
-        if (nLastSeen != CWalletDB::GetUpdateCounter())
-        {
-            nLastSeen = CWalletDB::GetUpdateCounter();
-            nLastWalletUpdate = GetTime();
-        }
+    if (nLastSeen != CWalletDB::GetUpdateCounter())
+    {
+        nLastSeen = CWalletDB::GetUpdateCounter();
+        nLastWalletUpdate = GetTime();
+    }
 
-        if (nLastFlushed != CWalletDB::GetUpdateCounter() && GetTime() - nLastWalletUpdate >= 2)
-        {
-            const std::string& strFile = pwalletMain->strWalletFile;
-            if (CDB::PeriodicFlush(strFile))
-                nLastFlushed = CWalletDB::GetUpdateCounter();
-        }
+    if (nLastFlushed != CWalletDB::GetUpdateCounter() && GetTime() - nLastWalletUpdate >= 2)
+    {
+        const std::string& strFile = pwalletMain->strWalletFile;
+        if (CDB::PeriodicFlush(strFile))
+            nLastFlushed = CWalletDB::GetUpdateCounter();
     }
+    fOneThread = false;
 }
 
 //
-- 
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