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// --------------------------------------------------------------------------
// OpenMS -- Open-Source Mass Spectrometry
// --------------------------------------------------------------------------
// Copyright The OpenMS Team -- Eberhard Karls University Tuebingen,
// ETH Zurich, and Freie Universitaet Berlin 2002-2013.
//
// This software is released under a three-clause BSD license:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of any author or any participating institution
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
// For a full list of authors, refer to the file AUTHORS.
// --------------------------------------------------------------------------
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL ANY OF THE AUTHORS OR THE CONTRIBUTING
// INSTITUTIONS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// --------------------------------------------------------------------------
// $Maintainer: Clemens Groepl $
// $Authors: $
// --------------------------------------------------------------------------
#include <OpenMS/CONCEPT/UniqueIdGenerator.h>
#include <gsl/gsl_rng.h>
// debugging
#define V_UniqueIdGenerator(a);
// #define V_UniqueIdGenerator(a) std::cout << "line " << __LINE__ << ": " << a << std::endl;
namespace OpenMS
{
namespace
{
// Defined outside so that we can initialize from different places.
// Note the "=0" and read the following comment.
static UniqueIdGenerator * instance_ = 0;
// Do not add a "=0" here: The initialization is taken care of by init_() or setSeed().
// Remember: The order of execution of static initializers is unspecified.
// Well, actually that paragraph does not apply here (instance_ is just a pointer, not an object)...
// But don't blame me ... just in case ...
static gsl_rng * rng_;
}
UInt64
UniqueIdGenerator::getUniqueId()
{
V_UniqueIdGenerator("UniqueIdGenerator::getUID()");
getInstance_();
UInt64 r;
#pragma omp critical
{
r = (UInt64(gsl_rng_get(rng_)) << 32) + UInt64(gsl_rng_get(rng_));
}
return r;
}
const Param &
UniqueIdGenerator::getInfo()
{
V_UniqueIdGenerator("UniqueIdGenerator::getInfo()");
return getInstance_().info_;
}
// We can't add an underscore to a private constructor, sorry! Even templates won't help. ;-)
UniqueIdGenerator::UniqueIdGenerator()
{
V_UniqueIdGenerator("UniqueIdGenerator::UniqueIdGenerator()");
rng_ = gsl_rng_alloc(gsl_rng_mt19937);
// The random seed is set by a call to init_()
// from within either getInstance_() or setSeed(),
// depending upon what is called first.
return;
}
UniqueIdGenerator &
UniqueIdGenerator::getInstance_()
{
V_UniqueIdGenerator("UniqueIdGenerator::getInstance_()");
if (!instance_)
{
instance_ = new UniqueIdGenerator();
instance_->init_(OpenMS::DateTime::now());
}
return *instance_;
}
void
UniqueIdGenerator::setSeed(const DateTime & date_time)
{
V_UniqueIdGenerator("UniqueIdGenerator::setSeed()");
if (!instance_)
{
instance_ = new UniqueIdGenerator();
}
instance_->init_(date_time);
return;
}
void
UniqueIdGenerator::init_(const DateTime & date_time)
{
V_UniqueIdGenerator("UniqueIdGenerator::init_()");
const UInt64 seed_64 = date_time.toString("yyyyMMddhhmmsszzz").toLongLong();
const unsigned long int actually_used_seed = ((UInt64(1) << 32) - 1) & ((seed_64 >> 32) ^ seed_64); // just to mix the bits a bit
gsl_rng_set(rng_, actually_used_seed);
info_.setValue("generator_type", gsl_rng_name(rng_));
info_.setValue("generator_min", String(gsl_rng_min(rng_)));
info_.setValue("generator_max", String(gsl_rng_max(rng_)));
info_.setValue("initialization_date_time_as_string", date_time.get());
info_.setValue("initialization_date_time_as_longlong", String(seed_64));
info_.setValue("actually_used_seed", String(actually_used_seed));
V_UniqueIdGenerator("info:\n" << info_);
return;
}
UniqueIdGenerator::~UniqueIdGenerator()
{
V_UniqueIdGenerator("UniqueIdGenerator::~UniqueIdGenerator()");
gsl_rng_free(rng_);
return;
}
}
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