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/**************************************************************************
* *
* Regina - A Normal Surface Theory Calculator *
* Python Interface *
* *
* Copyright (c) 1999-2025, Ben Burton *
* For further details contact Ben Burton (bab@debian.org). *
* *
* This program 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 2 of the *
* License, or (at your option) any later version. *
* *
* As an exception, when this program is distributed through (i) the *
* App Store by Apple Inc.; (ii) the Mac App Store by Apple Inc.; or *
* (iii) Google Play by Google Inc., then that store may impose any *
* digital rights management, device limits and/or redistribution *
* restrictions that are required by its terms of service. *
* *
* This program 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, see <https://www.gnu.org/licenses/>. *
* *
**************************************************************************/
#include "../gui/pythoninterpreter.h"
#include "../gui/pythonoutputstream.h"
#include <fstream>
#include <iostream>
#include <thread>
/**
* This test runs some simple Regina/Python commands in multiple embedded
* Python subinterpreters, where these commands involve pure Python callbacks.
* The purpose of this test is to ensure that Regina's Python module handles
* callbacks correctly when used in multiple subinterpreters.
*/
class NativeOutputStream : public regina::python::PythonOutputStream {
private:
std::ostream& stream_;
public:
NativeOutputStream(std::ostream& stream) : stream_(stream) {}
protected:
virtual void processOutput(const std::string& data) override {
stream_ << data;
stream_.flush();
}
};
struct Session {
NativeOutputStream out;
NativeOutputStream err;
regina::python::PythonInterpreter py;
Session(const char* exec) :
out(std::cout), err(std::cerr), py(out, err, false) {
// We do not adjust the Python path to reflect Regina's installation
// location, since this test is designed to be run directly out of the
// source tree.
if (! py.importRegina(false)) {
std::cerr << "ERROR: Could not import regina" << std::endl;
::exit(2);
}
py.executeLine("from regina import *");
py.deduceDirs(exec);
}
void executeLine(const char* line) {
py.executeLine(line);
}
};
int main(int argc, char* argv[]) {
// Tests that do not use GILCallbackManager under the hood:
{
Session s(argv[0]);
s.executeLine("def sortInc(a, b):");
s.executeLine(" return a.str() < b.str()");
s.executeLine("");
s.executeLine("s = NormalSurfaces(Example3.poincare(), NormalCoords.Standard)");
s.executeLine("print(s.detail())");
s.executeLine("s.sort(sortInc)");
s.executeLine("print(s.detail())");
}
{
Session s(argv[0]);
s.executeLine("def sortInc(a, b):");
s.executeLine(" return a.str() < b.str()");
s.executeLine("");
s.executeLine("s = NormalSurfaces(Example3.poincare(), NormalCoords.Standard)");
s.executeLine("print(s.detail())");
s.executeLine("s.sort(sortInc)");
s.executeLine("print(s.detail())");
}
{
Session s1(argv[0]);
Session s2(argv[0]);
s1.executeLine("def sortInc(a, b):");
s1.executeLine(" return a.str() < b.str()");
s1.executeLine("");
s1.executeLine("s = NormalSurfaces(Example3.poincare(), NormalCoords.Standard)");
s2.executeLine("def sortInc(a, b):");
s2.executeLine(" return a.str() < b.str()");
s2.executeLine("");
s2.executeLine("s = NormalSurfaces(Example3.poincare(), NormalCoords.Standard)");
s1.executeLine("print(s.detail())");
s2.executeLine("print(s.detail())");
s1.executeLine("s.sort(sortInc)");
s1.executeLine("print(s.detail())");
s2.executeLine("print(s.detail())");
s2.executeLine("s.sort(sortInc)");
s1.executeLine("print(s.detail())");
s2.executeLine("print(s.detail())");
}
// Tests that do use GILCallbackManager under the hood:
{
Session s(argv[0]);
s.executeLine("ans = None");
s.executeLine("def store(vec):");
s.executeLine(" global ans");
s.executeLine(" ans.append(vec)");
s.executeLine("");
s.executeLine("def dump():");
s.executeLine(" global ans");
s.executeLine(" ans.sort(key = str)");
s.executeLine(" for v in ans:");
s.executeLine(" print(v)");
s.executeLine(" print()");
s.executeLine("");
s.executeLine("tri = Example3.lens(3, 1)");
s.executeLine("m = makeMatchingEquations(tri, NormalCoords.Standard)");
s.executeLine("c = ValidityConstraints(7, tri.size())");
s.executeLine("ans = []");
s.executeLine("DoubleDescription.enumerate(store, m, c)");
s.executeLine("dump()");
}
return 0;
}
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