better wallet.dat flush, consolidated QueryPerformanceCounter, PRI64d printf portability

git-svn-id: https://bitcoin.svn.sourceforge.net/svnroot/bitcoin/trunk@20 1a98c847-1fd6-4fd8-948a-caf3550aa51b

1 files changed, 53 insertions, 23 deletions

diff --git a/db.cpp b/db.cpp
index 315e93b73a..699a94f2ea 100644
--- a/db.cpp
+++ b/db.cpp
@@ -4,8 +4,11 @@
 

 #include "headers.h"

 

+void ThreadFlushWalletDB(void* parg);

 

 

+unsigned int nWalletDBUpdated;

+

 

 

 

@@ -56,6 +59,8 @@ CDB::CDB(const char* pszFile, const char* pszMode, bool fTxn) : pdb(NULL)
     {

         if (!fDbEnvInit)

         {

+            if (fShutdown)

+                return;

             string strAppDir = GetAppDir();

             string strLogDir = strAppDir + "\\database";

             _mkdir(strLogDir.c_str());

@@ -121,12 +126,10 @@ void CDB::Close()
     pdb->close(0);

     delete pdb;

     pdb = NULL;

+    dbenv.txn_checkpoint(0, 0, 0);

 

     CRITICAL_BLOCK(cs_db)

-    {

-        dbenv.txn_checkpoint(0, 0, 0);

         --mapFileUseCount[strFile];

-    }

 

     RandAddSeed();

 }

@@ -499,25 +502,6 @@ bool CReviewDB::WriteReviews(uint256 hash, const vector<CReview>& vReviews)
 // CWalletDB

 //

 

-CWalletDB::~CWalletDB()

-{

-    // Flush whenever all handles to wallet.dat are closed

-    CRITICAL_BLOCK(cs_db)

-    {

-        Close(); // close includes a txn_checkpoint

-        map<string, int>::iterator mi = mapFileUseCount.find(strFile);

-        if (mi != mapFileUseCount.end())

-        {

-            int nRefCount = (*mi).second;

-            if (nRefCount == 0)

-            {

-                dbenv.lsn_reset(strFile.c_str(), 0);

-                mapFileUseCount.erase(mi++);

-            }

-        }

-    }

-}

-

 bool CWalletDB::LoadWallet(vector<unsigned char>& vchDefaultKeyRet)

 {

     vchDefaultKeyRet.clear();

@@ -610,7 +594,7 @@ bool CWalletDB::LoadWallet(vector<unsigned char>& vchDefaultKeyRet)
 

     printf("fShowGenerated = %d\n", fShowGenerated);

     printf("fGenerateBitcoins = %d\n", fGenerateBitcoins);

-    printf("nTransactionFee = %I64d\n", nTransactionFee);

+    printf("nTransactionFee = %"PRI64d"\n", nTransactionFee);

     printf("addrIncoming = %s\n", addrIncoming.ToString().c_str());

     printf("fMinimizeToTray = %d\n", fMinimizeToTray);

     printf("fMinimizeOnClose = %d\n", fMinimizeOnClose);

@@ -655,5 +639,51 @@ bool LoadWallet(bool& fFirstRunRet)
         CWalletDB().WriteDefaultKey(keyUser.GetPubKey());

     }

 

+    _beginthread(ThreadFlushWalletDB, 0, NULL);

     return true;

 }

+

+void ThreadFlushWalletDB(void* parg)

+{

+    static bool fOneThread;

+    if (fOneThread)

+        return;

+    fOneThread = true;

+

+    unsigned int nLastSeen = nWalletDBUpdated;

+    unsigned int nLastFlushed = nWalletDBUpdated;

+    int64 nLastWalletUpdate = GetTime();

+    while (!fShutdown)

+    {

+        Sleep(500);

+

+        if (nLastSeen != nWalletDBUpdated)

+        {

+            nLastSeen = nWalletDBUpdated;

+            nLastWalletUpdate = GetTime();

+        }

+

+        if (nLastFlushed != nWalletDBUpdated && nLastWalletUpdate < GetTime() - 1)

+        {

+            TRY_CRITICAL_BLOCK(cs_db)

+            {

+                string strFile = "wallet.dat";

+                map<string, int>::iterator mi = mapFileUseCount.find(strFile);

+                if (mi != mapFileUseCount.end())

+                {

+                    int nRefCount = (*mi).second;

+                    if (nRefCount == 0 && !fShutdown)

+                    {

+                        // Flush wallet.dat so it's self contained

+                        nLastFlushed == nWalletDBUpdated;

+                        int64 nStart = PerformanceCounter();

+                        dbenv.txn_checkpoint(0, 0, 0);

+                        dbenv.lsn_reset(strFile.c_str(), 0);

+                        printf("Flushed wallet.dat %15"PRI64d"\n", PerformanceCounter() - nStart);

+                        mapFileUseCount.erase(mi++);

+                    }

+                }

+            }

+        }

+    }

+}