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Postpone error message display if not in GUI thread

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Calls to report_error() crashed if not called from GUI thread.
Fix this by postponing error message display if not in GUI thread.
Code that creates a thread which possibly calls report_error()
is responsible for calling MainWindow::showErrors() to flush
the accumulated messages.

Note that there is a race condition in report_error() and
get_error_string(). Nevertheless, hitting it should be rather
unlikely (two threads producing error messages at the same time)
and hopefully it can be fixed rather easily.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2017-10-31 21:28:59 +01:00 • committed by Dirk Hohndel
parent 945a0a8748
commit 3acc28cebf
3 changed files with 21 additions and 3 deletions
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4
desktop-widgets/mainwindow.h
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@ -89,6 +89,10 @@ public:
void enableDisableCloudActions();
void setCheckedActionFilterTags(bool checked);
// Shows errors that have accumulated.
// Must be called from GUI thread.
void showErrors();
private
slots:
/* file menu action */