Add support for parallel extraction of component archives

Introduce ConcurrentOperationRunner class used for running
installer operations concurrently in the global thread pool.

Add execution groups for operations; Unpack operations are run
concurrently for all components requesting installation,
operations belonging to Install group are run sequentially for
sorted components one at a time as before. From the default
registered operations the Extract op is moved to Unpack group.

Move the previously on-the-fly backup steps of Extract operation
to the ExtractArchiveOperation::backup(), so that backups are
done before any archives are extracted, and that we know if any
of the archives requires administrator privileges to unpack.

Reparent QInstaller::Error to QException to support throwing
and catching exceptions across thread boundaries.

Use RAII for the server-side objects of the classes supporting
the remote client-server protocol of installer framework. The
concurrent extraction revealed that it was still possible that
the local socket was disconnected and thus the RemoteServer-
Connection thread finished before receiving and processing the
final "Destroy" command packet, leaking the dynamically
allocated objects.

Task-number: QTIFW-2566
Change-Id: Ib8c2928b9405b7b3465c731018df73acb51e949f
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: Katja Marttila <katja.marttila@qt.io>

1 files changed, 6 insertions, 8 deletions

diff --git a/src/libs/installer/errors.h b/src/libs/installer/errors.h
index 117eb5119..e8f2ee914 100644
--- a/src/libs/installer/errors.h
+++ b/src/libs/installer/errors.h
@@ -1,6 +1,6 @@
 /**************************************************************************
 **
-** Copyright (C) 2017 The Qt Company Ltd.
+** Copyright (C) 2022 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the Qt Installer Framework.
@@ -31,23 +31,21 @@
 
 #include <QtCore/QDebug>
 #include <QtCore/QString>
-
-#include <stdexcept>
+#include <QtCore/QException>
 
 namespace QInstaller {
 
-class Error : public std::exception
+class Error : public QException
 {
 public:
-    Error()
-    {}
+    Error() = default;
 
     explicit Error(const QString &message)
         : m_message(message)
     {}
 
-    virtual ~Error() throw()
-    {}
+    void raise() const override { throw *this; }
+    Error *clone() const override { return new Error(*this); }
 
     QString message() const { return m_message; }