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, 1 insertions, 0 deletions

diff --git a/doc/scripting.qdoc b/doc/scripting.qdoc
index d196bf8fb..bb547a0d6 100644
--- a/doc/scripting.qdoc
+++ b/doc/scripting.qdoc
@@ -147,6 +147,7 @@
     CustomOperation()
     {
         setName( "CustomOperation" );
+        setGroup( Install );
     }
 
     void backup()