From 29ab96dbd2bc76152de6eff09755b1b66b29474d Mon Sep 17 00:00:00 2001
From: practicalswift <practicalswift@users.noreply.github.com>
Date: Wed, 9 Aug 2017 16:24:12 +0200
Subject: Use unique_ptr for dbenv (DbEnv)

---
 src/wallet/db.cpp | 19 ++++++++-----------
 1 file changed, 8 insertions(+), 11 deletions(-)

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

diff --git a/src/wallet/db.cpp b/src/wallet/db.cpp
index 5d48b01c2e..520c16d9c6 100644
--- a/src/wallet/db.cpp
+++ b/src/wallet/db.cpp
@@ -75,13 +75,12 @@ void CDBEnv::EnvShutdown()
 
 void CDBEnv::Reset()
 {
-    delete dbenv;
-    dbenv = new DbEnv(DB_CXX_NO_EXCEPTIONS);
+    dbenv.reset(new DbEnv(DB_CXX_NO_EXCEPTIONS));
     fDbEnvInit = false;
     fMockDb = false;
 }
 
-CDBEnv::CDBEnv() : dbenv(nullptr)
+CDBEnv::CDBEnv()
 {
     Reset();
 }
@@ -89,8 +88,6 @@ CDBEnv::CDBEnv() : dbenv(nullptr)
 CDBEnv::~CDBEnv()
 {
     EnvShutdown();
-    delete dbenv;
-    dbenv = nullptr;
 }
 
 void CDBEnv::Close()
@@ -182,7 +179,7 @@ CDBEnv::VerifyResult CDBEnv::Verify(const std::string& strFile, recoverFunc_type
     LOCK(cs_db);
     assert(mapFileUseCount.count(strFile) == 0);
 
-    Db db(dbenv, 0);
+    Db db(dbenv.get(), 0);
     int result = db.verify(strFile.c_str(), nullptr, nullptr, 0);
     if (result == 0)
         return VERIFY_OK;
@@ -225,7 +222,7 @@ bool CDB::Recover(const std::string& filename, void *callbackDataIn, bool (*reco
     }
     LogPrintf("Salvage(aggressive) found %u records\n", salvagedData.size());
 
-    std::unique_ptr<Db> pdbCopy(new Db(bitdb.dbenv, 0));
+    std::unique_ptr<Db> pdbCopy(new Db(bitdb.dbenv.get(), 0));
     int ret = pdbCopy->open(nullptr,               // Txn pointer
                             filename.c_str(),   // Filename
                             "main",             // Logical db name
@@ -334,7 +331,7 @@ bool CDBEnv::Salvage(const std::string& strFile, bool fAggressive, std::vector<C
 
     std::stringstream strDump;
 
-    Db db(dbenv, 0);
+    Db db(dbenv.get(), 0);
     int result = db.verify(strFile.c_str(), nullptr, &strDump, flags);
     if (result == DB_VERIFY_BAD) {
         LogPrintf("CDBEnv::Salvage: Database salvage found errors, all data may not be recoverable.\n");
@@ -525,7 +522,7 @@ bool CDB::Rewrite(CWalletDBWrapper& dbw, const char* pszSkip)
                 std::string strFileRes = strFile + ".rewrite";
                 { // surround usage of db with extra {}
                     CDB db(dbw, "r");
-                    Db* pdbCopy = new Db(env->dbenv, 0);
+                    Db* pdbCopy = new Db(env->dbenv.get(), 0);
 
                     int ret = pdbCopy->open(nullptr,               // Txn pointer
                                             strFileRes.c_str(), // Filename
@@ -577,10 +574,10 @@ bool CDB::Rewrite(CWalletDBWrapper& dbw, const char* pszSkip)
                     delete pdbCopy;
                 }
                 if (fSuccess) {
-                    Db dbA(env->dbenv, 0);
+                    Db dbA(env->dbenv.get(), 0);
                     if (dbA.remove(strFile.c_str(), nullptr, 0))
                         fSuccess = false;
-                    Db dbB(env->dbenv, 0);
+                    Db dbB(env->dbenv.get(), 0);
                     if (dbB.rename(strFileRes.c_str(), nullptr, strFile.c_str(), 0))
                         fSuccess = false;
                 }
-- 
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