Ichthyostega
4f50cbc386
The existing TypedCounter_test was excessively clever and convoluted, yet failed to test the critical elements systematically. Indeed, two bugs were hidden in synchronisation and instance access. - build a new concurrent test from scratch, now using the threadBenchmark function for the actual concurrent execution and just invoked a random selected access to the counter repeatedly from a large number of threads. - rework the TypedContext and counter to use Atomics where applicable; measurements indicate however that this has only negligible impact on the amortised invocation times, which are around 60ns for single-threaded access, yet can increase by factor 100 due to contention.
72 lines
1.8 KiB
C++
72 lines
1.8 KiB
C++
/*
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GenFunc - generic identification functions (raw)
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Copyright (C) Lumiera.org
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2015, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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/** @file genfunc.cpp
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** Implementation of generic functions to build identification schemes.
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*/
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#include "lib/idi/genfunc.hpp"
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#include "lib/format-string.hpp"
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#include "lib/format-obj.hpp"
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#include "lib/util.hpp"
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#include <string>
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#include <boost/functional/hash.hpp>
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using util::_Fmt;
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using std::string;
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namespace lib {
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namespace idi {
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namespace format { // generic entry points / integration helpers...
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string
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instance_format (string const& prefix, size_t instanceNr)
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{
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return _Fmt("%s.%03d")
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% prefix % instanceNr;
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}
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string
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instance_hex_format (string const& prefix, size_t instanceNr)
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{
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return _Fmt("%s.%04X")
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% prefix % instanceNr;
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}
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} //(End)integration helpers...
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TypedCounter&
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sharedInstanceCounter()
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{ // Meyer's Singleton
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static TypedCounter instanceCounter;
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return instanceCounter;
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}
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}} // namespace lib::idi
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