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// ------------------------------------------------------------------------
//
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2000 - 2025 by the deal.II authors
//
// This file is part of the deal.II library.
//
// Part of the source code is dual licensed under Apache-2.0 WITH
// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
// governing the source code and code contributions can be found in
// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
//
// ------------------------------------------------------------------------
#include <deal.II/base/mutex.h>
#include <deal.II/base/thread_management.h>
#include <atomic>
#include <cstdlib>
#include <iostream>
#ifdef DEAL_II_HAVE_UNISTD_H
# include <unistd.h>
#endif
DEAL_II_NAMESPACE_OPEN
namespace Threads
{
namespace internal
{
[[noreturn]] void
handle_std_exception(const std::exception &exc)
{
// lock the following context
// to ensure that we don't
// print things over each other
// if we have trouble from
// multiple threads. release
// the lock before calling
// std::abort, though
static Mutex mutex;
{
std::lock_guard<std::mutex> lock(mutex);
std::cerr
<< std::endl
<< std::endl
<< "---------------------------------------------------------"
<< std::endl
<< "In one of the sub-threads of this program, an exception\n"
<< "was thrown and not caught. Since exceptions do not\n"
<< "propagate to the main thread, the library has caught it.\n"
<< "The information carried by this exception is given below.\n"
<< std::endl
<< "---------------------------------------------------------"
<< std::endl;
std::cerr << "Exception message: " << std::endl
<< " " << exc.what() << std::endl
<< "Exception type: " << std::endl
<< " " << typeid(exc).name() << std::endl;
std::cerr << "Aborting!" << std::endl
<< "---------------------------------------------------------"
<< std::endl;
}
std::abort();
}
[[noreturn]] void
handle_unknown_exception()
{
// lock the following context
// to ensure that we don't
// print things over each other
// if we have trouble from
// multiple threads. release
// the lock before calling
// std::abort, though
static Mutex mutex;
{
std::lock_guard<std::mutex> lock(mutex);
std::cerr
<< std::endl
<< std::endl
<< "---------------------------------------------------------"
<< std::endl
<< "In one of the sub-threads of this program, an exception\n"
<< "was thrown and not caught. Since exceptions do not\n"
<< "propagate to the main thread, the library has caught it.\n"
<< std::endl
<< "---------------------------------------------------------"
<< std::endl;
std::cerr << "Type of exception is unknown, but not std::exception.\n"
<< "No additional information is available.\n"
<< "---------------------------------------------------------"
<< std::endl;
}
std::abort();
}
} // namespace internal
std::vector<std::pair<unsigned int, unsigned int>>
split_interval(const unsigned int begin,
const unsigned int end,
const unsigned int n_intervals)
{
Assert(end >= begin, ExcInternalError());
const unsigned int n_elements = end - begin;
const unsigned int n_elements_per_interval = n_elements / n_intervals;
const unsigned int residual = n_elements % n_intervals;
std::vector<std::pair<unsigned int, unsigned int>> return_values(
n_intervals);
return_values[0].first = begin;
for (unsigned int i = 0; i < n_intervals; ++i)
{
if (i != n_intervals - 1)
{
return_values[i].second =
(return_values[i].first + n_elements_per_interval);
// distribute residual in
// division equally among
// the first few
// subintervals
if (i < residual)
++return_values[i].second;
return_values[i + 1].first = return_values[i].second;
}
else
return_values[i].second = end;
}
return return_values;
}
} // namespace Threads
DEAL_II_NAMESPACE_CLOSE
|
