# HG changeset patch
# User Pieter Wuille <pieter.wuille@gmail.com>
# Date 1335442857 25200
# Node ID bffdc5c4d973bc0e1b31aac08c2455b4246c1c4d
# Parent  0340d3a668c1826f6705a6d998f75b86c60fc560# Parent  2d4c7d77f691d6799be53070a181502dc8248fe4
Merge pull request #1119 from sipa/fastshutdown

Make lsn_reset ("detach databases") optional and off by default.

diff --git a/src/db.cpp b/src/db.cpp
--- a/src/db.cpp
+++ b/src/db.cpp
@@ -28,6 +28,7 @@
 
 CCriticalSection cs_db;
 static bool fDbEnvInit = false;
+bool fDetachDB = false;
 DbEnv dbenv(0);
 map<string, int> mapFileUseCount;
 static map<string, Db*> mapDb;
@@ -307,9 +308,13 @@
             {
                 // Move log data to the dat file
                 CloseDb(strFile);
+                printf("%s checkpoint\n", strFile.c_str());
                 dbenv.txn_checkpoint(0, 0, 0);
-                printf("%s flush\n", strFile.c_str());
-                dbenv.lsn_reset(strFile.c_str(), 0);
+                if ((strFile != "blkindex.dat" && strFile != "addr.dat") || fDetachDB) {
+                    printf("%s detach\n", strFile.c_str());
+                    dbenv.lsn_reset(strFile.c_str(), 0);
+                }
+                printf("%s closed\n", strFile.c_str());
                 mapFileUseCount.erase(mi++);
             }
             else
diff --git a/src/db.h b/src/db.h
--- a/src/db.h
+++ b/src/db.h
@@ -25,6 +25,7 @@
 class CWalletTx;
 
 extern unsigned int nWalletDBUpdated;
+extern bool fDetachDB;
 extern DbEnv dbenv;
 
 extern void DBFlush(bool fShutdown);
diff --git a/src/init.cpp b/src/init.cpp
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -200,6 +200,7 @@
 #else
             "  -upnp            \t  "   + _("Use Universal Plug and Play to map the listening port (default: 0)") + "\n" +
 #endif
+            "  -detachdb        \t  "   + _("Detach block and address databases. Increases shutdown time (default: 0)") + "\n" +
 #endif
             "  -paytxfee=<amt>  \t  "   + _("Fee per KB to add to transactions you send") + "\n" +
 #ifdef QT_GUI
@@ -255,6 +256,7 @@
     }
 
     fDebug = GetBoolArg("-debug");
+    fDetachDB = GetBoolArg("-detachdb", false);
 
 #if !defined(WIN32) && !defined(QT_GUI)
     fDaemon = GetBoolArg("-daemon");
diff --git a/src/qt/optionsdialog.cpp b/src/qt/optionsdialog.cpp
--- a/src/qt/optionsdialog.cpp
+++ b/src/qt/optionsdialog.cpp
@@ -38,6 +38,7 @@
     QCheckBox *minimize_on_close;
 #endif
     QCheckBox *connect_socks4;
+    QCheckBox *detach_database;
     QLineEdit *proxy_ip;
     QLineEdit *proxy_port;
     BitcoinAmountField *fee_edit;
@@ -229,6 +230,10 @@
 
     layout->addLayout(fee_hbox);
 
+    detach_database = new QCheckBox(tr("Detach databases at shutdown"));
+    detach_database->setToolTip(tr("Detach block and address databases at shutdown. This means they can be moved to another data directory, but it slows down shutdown. The wallet is always detached."));
+    layout->addWidget(detach_database);
+
     layout->addStretch(1); // Extra space at bottom
 
     setLayout(layout);
@@ -256,6 +261,7 @@
     mapper->addMapping(proxy_ip, OptionsModel::ProxyIP);
     mapper->addMapping(proxy_port, OptionsModel::ProxyPort);
     mapper->addMapping(fee_edit, OptionsModel::Fee);
+    mapper->addMapping(detach_database, OptionsModel::DetachDatabases);
 }
 
 DisplayOptionsPage::DisplayOptionsPage(QWidget *parent):
diff --git a/src/qt/optionsmodel.cpp b/src/qt/optionsmodel.cpp
--- a/src/qt/optionsmodel.cpp
+++ b/src/qt/optionsmodel.cpp
@@ -28,6 +28,8 @@
         SoftSetBoolArg("-upnp", settings.value("fUseUPnP").toBool());
     if (settings.contains("addrProxy") && settings.value("fUseProxy").toBool())
         SoftSetArg("-proxy", settings.value("addrProxy").toString().toStdString());
+    if (settings.contains("detachDB"))
+        SoftSetBoolArg("-detachdb", settings.value("detachDB").toBool());
 }
 
 bool OptionsModel::Upgrade()
@@ -121,6 +123,8 @@
             return QVariant(nDisplayUnit);
         case DisplayAddresses:
             return QVariant(bDisplayAddresses);
+        case DetachDatabases:
+            return QVariant(fDetachDB);
         default:
             return QVariant();
         }
@@ -204,6 +208,11 @@
             settings.setValue("bDisplayAddresses", bDisplayAddresses);
             }
             break;
+        case DetachDatabases: {
+            fDetachDB = value.toBool();
+            settings.setValue("detachDB", fDetachDB);
+            }
+            break;
         default:
             break;
         }
diff --git a/src/qt/optionsmodel.h b/src/qt/optionsmodel.h
--- a/src/qt/optionsmodel.h
+++ b/src/qt/optionsmodel.h
@@ -26,7 +26,8 @@
         Fee, // qint64
         DisplayUnit, // BitcoinUnits::Unit
         DisplayAddresses, // bool
-        OptionIDRowCount
+        DetachDatabases, // bool
+        OptionIDRowCount,
     };
 
     void Init();