summaryrefslogtreecommitdiff
path: root/ext/pybind11/tests/test_buffers.cpp
diff options
context:
space:
mode:
authorAndreas Sandberg <andreas.sandberg@arm.com>2017-02-27 13:17:51 +0000
committerAndreas Sandberg <andreas.sandberg@arm.com>2017-05-02 12:37:32 +0000
commitc79706ff4ce591df2151db5504d3c224f3c9965f (patch)
treeb56cd2bfe704a40575a71075e78194a4c516c98d /ext/pybind11/tests/test_buffers.cpp
parent359cb08623324b62d7c34973ae54d5bc7f23f9fd (diff)
downloadgem5-c79706ff4ce591df2151db5504d3c224f3c9965f.tar.xz
ext: Add pybind rev f4b81b3
Change-Id: I52e4fc9ebf2f59da57d8cf8f3e37cc79598c2f5f Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com> Reviewed-by: Andreas Hansson <andreas.hansson@arm.com> Reviewed-by: Curtis Dunham <curtis.dunham@arm.com> Reviewed-on: https://gem5-review.googlesource.com/2229 Reviewed-by: Tony Gutierrez <anthony.gutierrez@amd.com> Reviewed-by: Jason Lowe-Power <jason@lowepower.com> Reviewed-by: Pierre-Yves PĂ©neau <pierre-yves.peneau@lirmm.fr>
Diffstat (limited to 'ext/pybind11/tests/test_buffers.cpp')
-rw-r--r--ext/pybind11/tests/test_buffers.cpp117
1 files changed, 117 insertions, 0 deletions
diff --git a/ext/pybind11/tests/test_buffers.cpp b/ext/pybind11/tests/test_buffers.cpp
new file mode 100644
index 000000000..c3a7a9e02
--- /dev/null
+++ b/ext/pybind11/tests/test_buffers.cpp
@@ -0,0 +1,117 @@
+/*
+ tests/test_buffers.cpp -- supporting Pythons' buffer protocol
+
+ Copyright (c) 2016 Wenzel Jakob <wenzel.jakob@epfl.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 "pybind11_tests.h"
+#include "constructor_stats.h"
+
+class Matrix {
+public:
+ Matrix(size_t rows, size_t cols) : m_rows(rows), m_cols(cols) {
+ print_created(this, std::to_string(m_rows) + "x" + std::to_string(m_cols) + " matrix");
+ m_data = new float[rows*cols];
+ memset(m_data, 0, sizeof(float) * rows * cols);
+ }
+
+ Matrix(const Matrix &s) : m_rows(s.m_rows), m_cols(s.m_cols) {
+ print_copy_created(this, std::to_string(m_rows) + "x" + std::to_string(m_cols) + " matrix");
+ m_data = new float[m_rows * m_cols];
+ memcpy(m_data, s.m_data, sizeof(float) * m_rows * m_cols);
+ }
+
+ Matrix(Matrix &&s) : m_rows(s.m_rows), m_cols(s.m_cols), m_data(s.m_data) {
+ print_move_created(this);
+ s.m_rows = 0;
+ s.m_cols = 0;
+ s.m_data = nullptr;
+ }
+
+ ~Matrix() {
+ print_destroyed(this, std::to_string(m_rows) + "x" + std::to_string(m_cols) + " matrix");
+ delete[] m_data;
+ }
+
+ Matrix &operator=(const Matrix &s) {
+ print_copy_assigned(this, std::to_string(m_rows) + "x" + std::to_string(m_cols) + " matrix");
+ delete[] m_data;
+ m_rows = s.m_rows;
+ m_cols = s.m_cols;
+ m_data = new float[m_rows * m_cols];
+ memcpy(m_data, s.m_data, sizeof(float) * m_rows * m_cols);
+ return *this;
+ }
+
+ Matrix &operator=(Matrix &&s) {
+ print_move_assigned(this, std::to_string(m_rows) + "x" + std::to_string(m_cols) + " matrix");
+ if (&s != this) {
+ delete[] m_data;
+ m_rows = s.m_rows; m_cols = s.m_cols; m_data = s.m_data;
+ s.m_rows = 0; s.m_cols = 0; s.m_data = nullptr;
+ }
+ return *this;
+ }
+
+ float operator()(size_t i, size_t j) const {
+ return m_data[i*m_cols + j];
+ }
+
+ float &operator()(size_t i, size_t j) {
+ return m_data[i*m_cols + j];
+ }
+
+ float *data() { return m_data; }
+
+ size_t rows() const { return m_rows; }
+ size_t cols() const { return m_cols; }
+private:
+ size_t m_rows;
+ size_t m_cols;
+ float *m_data;
+};
+
+test_initializer buffers([](py::module &m) {
+ py::class_<Matrix> mtx(m, "Matrix");
+
+ mtx.def(py::init<size_t, size_t>())
+ /// Construct from a buffer
+ .def("__init__", [](Matrix &v, py::buffer b) {
+ py::buffer_info info = b.request();
+ if (info.format != py::format_descriptor<float>::format() || info.ndim != 2)
+ throw std::runtime_error("Incompatible buffer format!");
+ new (&v) Matrix(info.shape[0], info.shape[1]);
+ memcpy(v.data(), info.ptr, sizeof(float) * v.rows() * v.cols());
+ })
+
+ .def("rows", &Matrix::rows)
+ .def("cols", &Matrix::cols)
+
+ /// Bare bones interface
+ .def("__getitem__", [](const Matrix &m, std::pair<size_t, size_t> i) {
+ if (i.first >= m.rows() || i.second >= m.cols())
+ throw py::index_error();
+ return m(i.first, i.second);
+ })
+ .def("__setitem__", [](Matrix &m, std::pair<size_t, size_t> i, float v) {
+ if (i.first >= m.rows() || i.second >= m.cols())
+ throw py::index_error();
+ m(i.first, i.second) = v;
+ })
+ /// Provide buffer access
+ .def_buffer([](Matrix &m) -> py::buffer_info {
+ return py::buffer_info(
+ m.data(), /* Pointer to buffer */
+ sizeof(float), /* Size of one scalar */
+ py::format_descriptor<float>::format(), /* Python struct-style format descriptor */
+ 2, /* Number of dimensions */
+ { m.rows(), m.cols() }, /* Buffer dimensions */
+ { sizeof(float) * m.rows(), /* Strides (in bytes) for each index */
+ sizeof(float) }
+ );
+ })
+ ;
+});