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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/boost/libs/python/test/pickle2.cpp | |
parent | Initial commit. (diff) | |
download | ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.tar.xz ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/boost/libs/python/test/pickle2.cpp')
-rw-r--r-- | src/boost/libs/python/test/pickle2.cpp | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/boost/libs/python/test/pickle2.cpp b/src/boost/libs/python/test/pickle2.cpp new file mode 100644 index 000000000..c9610946e --- /dev/null +++ b/src/boost/libs/python/test/pickle2.cpp @@ -0,0 +1,97 @@ +// Copyright Ralf W. Grosse-Kunstleve 2002-2004. Distributed under 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) + +/* + This example shows how to make an Extension Class "pickleable". + + The world class below contains member data (secret_number) that + cannot be restored by any of the constructors. Therefore it is + necessary to provide the __getstate__/__setstate__ pair of pickle + interface methods. + + For simplicity, the __dict__ is not included in the result of + __getstate__. This is not generally recommended, but a valid + approach if it is anticipated that the object's __dict__ will + always be empty. Note that safety guards are provided to catch + the cases where this assumption is not true. + + pickle3.cpp shows how to include the object's __dict__ in the + result of __getstate__. + + For more information refer to boost/libs/python/doc/pickle.html. + */ + +#include <boost/python/module.hpp> +#include <boost/python/def.hpp> +#include <boost/python/class.hpp> +#include <boost/python/tuple.hpp> +#include <boost/python/extract.hpp> + +namespace boost_python_test { + + // A friendly class. + class world + { + public: + world(const std::string& _country) : secret_number(0) { + this->country = _country; + } + std::string greet() const { return "Hello from " + country + "!"; } + std::string get_country() const { return country; } + void set_secret_number(int number) { secret_number = number; } + int get_secret_number() const { return secret_number; } + private: + std::string country; + int secret_number; + }; + + struct world_pickle_suite : boost::python::pickle_suite + { + static + boost::python::tuple + getinitargs(const world& w) + { + return boost::python::make_tuple(w.get_country()); + } + + static + boost::python::tuple + getstate(const world& w) + { + return boost::python::make_tuple(w.get_secret_number()); + } + + static + void + setstate(world& w, boost::python::tuple state) + { + using namespace boost::python; + if (len(state) != 1) + { + PyErr_SetObject(PyExc_ValueError, + ("expected 1-item tuple in call to __setstate__; got %s" + % state).ptr() + ); + throw_error_already_set(); + } + + long number = extract<long>(state[0]); + if (number != 42) + w.set_secret_number(number); + } + }; + +} + +BOOST_PYTHON_MODULE(pickle2_ext) +{ + using namespace boost_python_test; + boost::python::class_<world>( + "world", boost::python::init<const std::string&>()) + .def("greet", &world::greet) + .def("get_secret_number", &world::get_secret_number) + .def("set_secret_number", &world::set_secret_number) + .def_pickle(world_pickle_suite()) + ; +} |