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do not use a global variable to define the number of available threads

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* python/spot/impl.i: Make parallel_policy implicitly contractible.
* spot/graph/graph.hh (sort_edges_srcfirst_): Pass a parallel_policy
explicitly.
* spot/twa/twagraph.hh, spot/twa/twagraph.cc (merge_states): Likewise.
* spot/misc/common.cc: Remove file.
* spot/misc/common.hh (set_nthreads, get_nthreads): Remove, and
replace with...
(parallel_policy): ... this.
* spot/misc/Makefile.am, tests/python/mergedge.py, NEWS: Adjust.
This commit is contained in:
Alexandre Duret-Lutz 2022-08-12 14:56:45 +02:00
parent 2848951965
commit d1b8495510
9 changed files with 137 additions and 154 deletions
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31
spot/misc/common.hh
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@ -1,5 +1,5 @@
// -*- coding: utf-8 -*-
// Copyright (C) 2013-2021 Laboratoire de Recherche et Développement
// Copyright (C) 2013-2022 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
//
// This file is part of Spot, a model checking library.
@ -145,6 +145,27 @@ namespace spot
{
}
};
/// \brief This class is used to tell parallel algorithms what
/// resources they may use.
///
/// Currently, this simply stores an integer indicating the number
/// of threads that the algorithm may create, but in the future it
/// will probably do more.
class SPOT_API parallel_policy
{
unsigned nthreads_;
public:
parallel_policy(unsigned nthreads = 1) : nthreads_(nthreads)
{
}
unsigned nthreads() const
{
return nthreads_;
}
};
}
// This is a workaround for the issue described in GNU GCC bug 89303.
@ -169,11 +190,3 @@ namespace spot
# define SPOT_make_shared_enabled__(TYPE, ...) \
std::make_shared<TYPE>(__VA_ARGS__)
#endif
// Global variable to determine the maximal number of threads
SPOT_API void
set_nthreads(unsigned nthreads);
SPOT_API unsigned
get_nthreads();