Sqlite: Optimize the initialization

https: //www.sqlite.org/compile.html#omit_autoinit

Change-Id: Iaa91203be21f01a19235a9401cb4fa412eca8276
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/libs/sqlite/CMakeLists.txt

@@ -10,7 +10,7 @@ add_qtc_library(Sqlite
       SQLITE_OMIT_LOAD_EXTENSION SQLITE_OMIT_UTF16 SQLITE_DQS=0
       SQLITE_ENABLE_STAT4 HAVE_ISNAN HAVE_FDATASYNC HAVE_MALLOC_USABLE_SIZE
       SQLITE_DEFAULT_MMAP_SIZE=268435456 SQLITE_CORE SQLITE_ENABLE_SESSION SQLITE_ENABLE_PREUPDATE_HOOK
-      SQLITE_LIKE_DOESNT_MATCH_BLOBS
+      SQLITE_LIKE_DOESNT_MATCH_BLOBS SQLITE_OMIT_AUTOINIT
   DEPENDS Qt5::Core Threads::Threads ${CMAKE_DL_LIBS}
   PUBLIC_INCLUDES
     "${CMAKE_CURRENT_LIST_DIR}"
@@ -46,4 +46,5 @@ add_qtc_library(Sqlite
     utf8stringvector.cpp utf8stringvector.h
     sqliteblob.h
     sqlitetimestamp.h
+    sqlitelibraryinitializer.cpp sqlitelibraryinitializer.h
 )

src/libs/sqlite/sqlite-lib.pri

@@ -15,6 +15,7 @@ SOURCES += \
     $$PWD/sqlitedatabasebackend.cpp \
     $$PWD/sqliteexception.cpp \
     $$PWD/sqliteglobal.cpp \
+    $$PWD/sqlitelibraryinitializer.cpp \
     $$PWD/sqlitesessionchangeset.cpp \
     $$PWD/sqlitesessions.cpp \
     $$PWD/sqlstatementbuilder.cpp \
@@ -25,6 +26,7 @@ SOURCES += \
 HEADERS += \
     $$PWD/constraints.h \
     $$PWD/sqliteblob.h \
+    $$PWD/sqlitelibraryinitializer.h \
     $$PWD/sqlitetimestamp.h \
     $$PWD/tableconstraints.h \
     $$PWD/createtablesqlstatementbuilder.h \
@@ -59,7 +61,7 @@ DEFINES += SQLITE_THREADSAFE=2 SQLITE_ENABLE_FTS5 SQLITE_ENABLE_UNLOCK_NOTIFY \
     SQLITE_OMIT_LOAD_EXTENSION SQLITE_OMIT_UTF16 SQLITE_DQS=0 \
     SQLITE_ENABLE_STAT4 HAVE_ISNAN HAVE_FDATASYNC HAVE_MALLOC_USABLE_SIZE \
     SQLITE_DEFAULT_MMAP_SIZE=268435456 SQLITE_CORE SQLITE_ENABLE_SESSION SQLITE_ENABLE_PREUPDATE_HOOK \
-    SQLITE_LIKE_DOESNT_MATCH_BLOBS
+    SQLITE_LIKE_DOESNT_MATCH_BLOBS SQLITE_OMIT_AUTOINIT
 
 CONFIG(debug, debug|release): DEFINES += SQLITE_ENABLE_API_ARMOR
 

src/libs/sqlite/sqlitelibraryinitializer.cpp

@@ -0,0 +1,47 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "sqlitelibraryinitializer.h"
+
+#include "sqlitedatabasebackend.h"
+
+namespace Sqlite {
+
+void LibraryInitializer::initialize()
+{
+    static LibraryInitializer initializer;
+}
+
+LibraryInitializer::LibraryInitializer()
+{
+    DatabaseBackend::initializeSqliteLibrary();
+}
+
+LibraryInitializer::~LibraryInitializer()
+{
+    DatabaseBackend::shutdownSqliteLibrary();
+}
+
+} // namespace Sqlite

src/libs/sqlite/sqlitelibraryinitializer.h

@@ -0,0 +1,42 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "sqliteglobal.h"
+
+namespace Sqlite {
+
+class LibraryInitializer
+{
+public:
+    SQLITE_EXPORT static void initialize();
+
+private:
+    LibraryInitializer();
+    ~LibraryInitializer();
+};
+
+} // namespace Sqlite