ExtraCompiler: Run extra compiler in a thread

and make sure there are not too many of these threads
running at any time. This stops the massive process
startup when loading a project with many UI files, etc.

Task-number: QTCREATORBUG-15795
Change-Id: Icfcddd80d04e36b61ecafbbefe5a1a8b7ea02ec6
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>
Reviewed-by: Ulf Hermann <ulf.hermann@theqtcompany.com>

1 files changed, 10 insertions, 5 deletions

diff --git a/src/plugins/qtsupport/qscxmlcgenerator.h b/src/plugins/qtsupport/qscxmlcgenerator.h
index 9a305996e70..cb375999c64 100644
--- a/src/plugins/qtsupport/qscxmlcgenerator.h
+++ b/src/plugins/qtsupport/qscxmlcgenerator.h
@@ -33,20 +33,25 @@
 
 namespace QtSupport {
 
-class QScxmlcGenerator : public ProjectExplorer::ExtraCompiler
+class QScxmlcGenerator : public ProjectExplorer::ProcessExtraCompiler
 {
     Q_OBJECT
 public:
     QScxmlcGenerator(const ProjectExplorer::Project *project, const Utils::FileName &source,
                      const Utils::FileNameList &targets, QObject *parent = 0);
 
+protected:
+    Utils::FileName command() const override;
+    QStringList arguments() const override;
+    Utils::FileName workingDirectory() const override;
+
 private:
-    void finishProcess();
-    void run(const QByteArray &sourceContent) override;
+    Utils::FileName tmpFile() const;
+    QList<QByteArray> handleProcessFinished(QProcess *process) override;
+    bool prepareToRun(const QByteArray &sourceContents) override;
+    QList<ProjectExplorer::Task> parseIssues(const QByteArray &processStderr) override;
 
-    QProcess m_process;
     QTemporaryDir m_tmpdir;
-    void parseIssues(const QByteArray &processStderr);
 };
 
 class QScxmlcGeneratorFactory : public ProjectExplorer::ExtraCompilerFactory