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// Copyright (C) 2005-2006 Douglas Gregor <doug.gregor@gmail.com>
// Use, modification and distribution is subject to the Boost Software
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// Message Passing Interface 1.1 -- 7.1.1. Environmental Inquiries
#include <boost/mpi/environment.hpp>
#include <boost/mpi/exception.hpp>
#include <boost/mpi/detail/mpi_datatype_cache.hpp>
#include <cassert>
#include <string>
#include <exception>
#include <stdexcept>
#include <ostream>
namespace boost { namespace mpi {
namespace threading {
std::istream& operator>>(std::istream& in, level& l)
{
std::string tk;
in >> tk;
if (!in.bad()) {
if (tk == "single") {
l = single;
} else if (tk == "funneled") {
l = funneled;
} else if (tk == "serialized") {
l = serialized;
} else if (tk == "multiple") {
l = multiple;
} else {
in.setstate(std::ios::badbit);
}
}
return in;
}
std::ostream& operator<<(std::ostream& out, level l)
{
switch(l) {
case single:
out << "single";
break;
case funneled:
out << "funneled";
break;
case serialized:
out << "serialized";
break;
case multiple:
out << "multiple";
break;
default:
out << "<level error>[" << int(l) << ']';
out.setstate(std::ios::badbit);
break;
}
return out;
}
} // namespace threading
#ifdef BOOST_MPI_HAS_NOARG_INITIALIZATION
environment::environment(bool abort_on_exception)
: i_initialized(false),
abort_on_exception(abort_on_exception)
{
if (!initialized()) {
BOOST_MPI_CHECK_RESULT(MPI_Init, (0, 0));
i_initialized = true;
}
MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
}
environment::environment(threading::level mt_level, bool abort_on_exception)
: i_initialized(false),
abort_on_exception(abort_on_exception)
{
// It is not clear that we can pass null in MPI_Init_thread.
int dummy_thread_level = 0;
if (!initialized()) {
BOOST_MPI_CHECK_RESULT(MPI_Init_thread,
(0, 0, int(mt_level), &dummy_thread_level ));
i_initialized = true;
}
MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
}
#endif
environment::environment(int& argc, char** &argv, bool abort_on_exception)
: i_initialized(false),
abort_on_exception(abort_on_exception)
{
if (!initialized()) {
BOOST_MPI_CHECK_RESULT(MPI_Init, (&argc, &argv));
i_initialized = true;
}
MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
}
environment::environment(int& argc, char** &argv, threading::level mt_level,
bool abort_on_exception)
: i_initialized(false),
abort_on_exception(abort_on_exception)
{
// It is not clear that we can pass null in MPI_Init_thread.
int dummy_thread_level = 0;
if (!initialized()) {
BOOST_MPI_CHECK_RESULT(MPI_Init_thread,
(&argc, &argv, int(mt_level), &dummy_thread_level));
i_initialized = true;
}
MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
}
environment::~environment()
{
if (i_initialized) {
if (std::uncaught_exception() && abort_on_exception) {
abort(-1);
} else if (!finalized()) {
detail::mpi_datatype_cache().clear();
BOOST_MPI_CHECK_RESULT(MPI_Finalize, ());
}
}
}
void environment::abort(int errcode)
{
BOOST_MPI_CHECK_RESULT(MPI_Abort, (MPI_COMM_WORLD, errcode));
}
bool environment::initialized()
{
int flag;
BOOST_MPI_CHECK_RESULT(MPI_Initialized, (&flag));
return flag != 0;
}
bool environment::finalized()
{
int flag;
BOOST_MPI_CHECK_RESULT(MPI_Finalized, (&flag));
return flag != 0;
}
int environment::max_tag()
{
int* max_tag_value;
int found = 0;
BOOST_MPI_CHECK_RESULT(MPI_Attr_get,
(MPI_COMM_WORLD, MPI_TAG_UB, &max_tag_value, &found));
assert(found != 0);
return *max_tag_value - num_reserved_tags;
}
int environment::collectives_tag()
{
return max_tag() + 1;
}
optional<int> environment::host_rank()
{
int* host;
int found = 0;
BOOST_MPI_CHECK_RESULT(MPI_Attr_get,
(MPI_COMM_WORLD, MPI_HOST, &host, &found));
if (!found || *host == MPI_PROC_NULL)
return optional<int>();
else
return *host;
}
optional<int> environment::io_rank()
{
int* io;
int found = 0;
BOOST_MPI_CHECK_RESULT(MPI_Attr_get,
(MPI_COMM_WORLD, MPI_IO, &io, &found));
if (!found || *io == MPI_PROC_NULL)
return optional<int>();
else
return *io;
}
std::string environment::processor_name()
{
char name[MPI_MAX_PROCESSOR_NAME];
int len;
BOOST_MPI_CHECK_RESULT(MPI_Get_processor_name, (name, &len));
return std::string(name, len);
}
threading::level environment::thread_level()
{
int level;
BOOST_MPI_CHECK_RESULT(MPI_Query_thread, (&level));
return static_cast<threading::level>(level);
}
bool environment::is_main_thread()
{
int isit;
BOOST_MPI_CHECK_RESULT(MPI_Is_thread_main, (&isit));
return static_cast<bool>(isit);
}
} } // end namespace boost::mpi
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