CppTools: Optionally move raw project parts creation into thread

... by letting callers pass in a generator function.
This takes some load off the UI thread for larger projects.
For now only used by the QbsProjectManager, which can provide a thread-
safe generator function due to the project data existing in "value"
form.

Task-number: QTCREATORBUG-18533
Change-Id: I525dea36a4c4079bd1bd5a4fff844617547d56f1
Reviewed-by: hjk <hjk@qt.io>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/plugins/cpptools/cppprojectupdater.cpp b/src/plugins/cpptools/cppprojectupdater.cpp
index f89f8e9fc8..4d95c5800e 100644
--- a/src/plugins/cpptools/cppprojectupdater.cpp
+++ b/src/plugins/cpptools/cppprojectupdater.cpp
@@ -61,7 +61,10 @@ void CppProjectUpdater::update(const ProjectExplorer::ProjectUpdateInfo &project
 
     // Run the project info generator in a worker thread and continue if that one is finished.
     const QFuture<ProjectInfo> future = Utils::runAsync([=]() {
-        Internal::ProjectInfoGenerator generator(m_futureInterface, projectUpdateInfo);
+        ProjectUpdateInfo fullProjectUpdateInfo = projectUpdateInfo;
+        if (fullProjectUpdateInfo.rppGenerator)
+            fullProjectUpdateInfo.rawProjectParts = fullProjectUpdateInfo.rppGenerator();
+        Internal::ProjectInfoGenerator generator(m_futureInterface, fullProjectUpdateInfo);
         return generator.generate();
     });
     m_generateFutureWatcher.setFuture(future);