From: Daniel Arndt Date: Sat, 11 Aug 2018 19:35:26 +0000 (+0200) Subject: Decrease counters in Subscriptor only upon success X-Git-Tag: v9.1.0-rc1~832^2 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7a5702cb4bb27a4bddb350f1f5d6cc80ed9ed206;p=dealii.git Decrease counters in Subscriptor only upon success --- diff --git a/source/base/subscriptor.cc b/source/base/subscriptor.cc index 6da08803df..57d0615c70 100644 --- a/source/base/subscriptor.cc +++ b/source/base/subscriptor.cc @@ -185,18 +185,22 @@ Subscriptor::unsubscribe(const char *id) const if (counter == 0) return; - --counter; - #ifdef DEAL_II_WITH_THREADS std::lock_guard lock(mutex); #endif map_iterator it = counter_map.find(name); - AssertNothrow(it != counter_map.end(), - ExcNoSubscriber(object_info->name(), name)); - AssertNothrow(it->second > 0, ExcNoSubscriber(object_info->name(), name)); - - it->second--; + if (it == counter_map.end() || it->second == 0) + { + AssertNothrow(it != counter_map.end(), + ExcNoSubscriber(object_info->name(), name)); + AssertNothrow(it->second > 0, ExcNoSubscriber(object_info->name(), name)); + } + else + { + --counter; + it->second--; + } } diff --git a/tests/base/unsubscribe_subscriptor.cc b/tests/base/unsubscribe_subscriptor.cc new file mode 100644 index 0000000000..84bc7487b1 --- /dev/null +++ b/tests/base/unsubscribe_subscriptor.cc @@ -0,0 +1,45 @@ +// --------------------------------------------------------------------- +// +// Copyright (C) 2018 by the deal.II authors +// +// This file is part of the deal.II library. +// +// The deal.II library is free software; you can use it, redistribute +// it, and/or modify it under the terms of the GNU Lesser General +// Public License as published by the Free Software Foundation; either +// version 2.1 of the License, or (at your option) any later version. +// The full text of the license can be found in the file LICENSE.md at +// the top level directory of deal.II. +// +// --------------------------------------------------------------------- + + + +// check that unsubscribing with a wrong id is handled correctly + + +#include +#include + +#include +#include + +#include "../tests.h" + +class Test : public Subscriptor +{}; + +int +main() +{ + deal_II_exceptions::disable_abort_on_exception(); + + initlog(); + + Subscriptor subscriptor; + subscriptor.subscribe("a"); + subscriptor.unsubscribe("b"); + subscriptor.unsubscribe("a"); + + return 0; +} diff --git a/tests/base/unsubscribe_subscriptor.debug.output b/tests/base/unsubscribe_subscriptor.debug.output new file mode 100644 index 0000000000..c2fb9adbc9 --- /dev/null +++ b/tests/base/unsubscribe_subscriptor.debug.output @@ -0,0 +1,12 @@ + +DEAL::Exception: ExcNoSubscriber(object_info->name(), name) +DEAL:: +-------------------------------------------------------- +An error occurred in file in function + void dealii::Subscriptor::unsubscribe(const char*) const +The violated condition was: + it != counter_map.end() +Additional information: + No subscriber with identifier subscribes to this object of class N6dealii11SubscriptorE. Consequently, it cannot be unsubscribed. +-------------------------------------------------------- +