Initial commit

example/example5.cpp

@@ -0,0 +1,95 @@
+/*
+    example/example5.cpp -- Example 5: inheritance, callbacks, acquiring
+    and releasing the global interpreter lock
+
+    Copyright (c) 2015 Wenzel Jakob <wenzel@inf.ethz.ch>
+
+    All rights reserved. Use of this source code is governed by a
+    BSD-style license that can be found in the LICENSE file.
+*/
+
+#include "example.h"
+
+
+class Pet {
+public:
+    Pet(const std::string &name, const std::string &species)
+        : m_name(name), m_species(species) {}
+    std::string name() const { return m_name; }
+    std::string species() const { return m_species; }
+private:
+    std::string m_name;
+    std::string m_species;
+};
+
+class Dog : public Pet {
+public:
+    Dog(const std::string &name) : Pet(name, "dog") {}
+    void bark() const { std::cout << "Woof!" << std::endl; }
+};
+
+void pet_print(const Pet &pet) {
+    std::cout << pet.name() + " is a " + pet.species() << std::endl;
+}
+
+void dog_bark(const Dog &dog) {
+    dog.bark();
+}
+
+class Example5  {
+public:
+    Example5(py::handle self, int state)
+        : self(self), state(state) {
+        cout << "Constructing Example5.." << endl;
+    }
+
+    ~Example5() {
+        cout << "Destructing Example5.." << endl;
+    }
+
+    void callback(int value) {
+		py::gil_scoped_acquire gil;
+        cout << "In Example5::callback() " << endl;
+        py::object method = self.attr("callback");
+        method.call(state, value);
+    }
+private:
+    py::handle self;
+    int state;
+};
+
+bool test_callback1(py::object func) {
+    func.call();
+    return false;
+}
+
+int test_callback2(py::object func) {
+    py::object result = func.call("Hello", true, 5);
+    return result.cast<int>();
+}
+
+void test_callback3(Example5 *ex, int value) {
+	py::gil_scoped_release gil;
+    ex->callback(value);
+}
+
+void init_ex5(py::module &m) {
+    py::class_<Pet> pet_class(m, "Pet");
+    pet_class
+        .def(py::init<std::string, std::string>())
+        .def("name", &Pet::name)
+        .def("species", &Pet::species);
+
+    py::class_<Dog>(m, "Dog", pet_class)
+        .def(py::init<std::string>());
+
+    m.def("pet_print", pet_print);
+    m.def("dog_bark", dog_bark);
+
+    m.def("test_callback1", &test_callback1);
+    m.def("test_callback2", &test_callback2);
+    m.def("test_callback3", &test_callback3);
+
+    py::class_<Example5>(m, "Example5")
+        .def(py::init<py::object, int>());
+}