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/* Init class declaration.
Copyright (C) 2001-2010 Roberto Bagnara <bagnara@cs.unipr.it>
Copyright (C) 2010-2011 BUGSENG srl (http://bugseng.com)
This file is part of the Parma Polyhedra Library (PPL).
The PPL is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The PPL is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307, USA.
For the most up-to-date information see the Parma Polyhedra Library
site: http://www.cs.unipr.it/ppl/ . */
#ifndef PPL_Init_defs_hh
#define PPL_Init_defs_hh 1
#include "Init.types.hh"
#include "fpu.types.hh"
namespace Parma_Polyhedra_Library {
/*! \brief
Sets the FPU rounding mode so that the PPL abstractions based on
floating point numbers work correctly.
This is performed automatically at initialization-time. Calling
this function is needed only if restore_pre_PPL_rounding() has been
previously called.
*/
void set_rounding_for_PPL();
/*! \brief
Sets the FPU rounding mode as it was before initialization of the PPL.
After calling this function it is absolutely necessary to call
set_rounding_for_PPL() before using any PPL abstractions based on
floating point numbers.
This is performed automatically at finalization-time.
*/
void restore_pre_PPL_rounding();
} // namespace Parma_Polyhedra_Library
#ifdef PPL_DOXYGEN_INCLUDE_IMPLEMENTATION_DETAILS
//! Class for initialization and finalization.
/*! \ingroup PPL_CXX_interface
<EM>Nifty Counter</EM> initialization class,
ensuring that the library is initialized only once
and before its first use.
A count of the number of translation units using the library
is maintained. A static object of Init type will be declared
by each translation unit using the library. As a result,
only one of them will initialize and properly finalize
the library.
*/
#endif // defined(PPL_DOXYGEN_INCLUDE_IMPLEMENTATION_DETAILS)
class Parma_Polyhedra_Library::Init {
public:
//! Initializes the PPL.
Init();
//! Finalizes the PPL.
~Init();
private:
//! Count the number of objects created.
static unsigned int count;
static fpu_rounding_direction_type old_rounding_direction;
friend void set_rounding_for_PPL();
friend void restore_pre_PPL_rounding();
};
#include "Init.inlines.hh"
#endif // !defined(PPL_Init_defs_hh)
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