From f2ebbee27423a3dd520ab483199c72bd43b7c347 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Mon, 2 Jun 2008 14:54:52 +0000
Subject: added unit tests for sizeof and dynamic memory allocation

---
 test/nomalloc.cpp | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 test/nomalloc.cpp

(limited to 'test/nomalloc.cpp')

diff --git a/test/nomalloc.cpp b/test/nomalloc.cpp
new file mode 100644
index 000000000..277e98630
--- /dev/null
+++ b/test/nomalloc.cpp
@@ -0,0 +1,87 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra. Eigen itself is part of the KDE project.
+//
+// Copyright (C) 2006-2008 Benoit Jacob <jacob@math.jussieu.fr>
+//
+// Eigen is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 3 of the License, or (at your option) any later version.
+//
+// Alternatively, 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.
+//
+// Eigen 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 Lesser General Public License or the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License and a copy of the GNU General Public License along with
+// Eigen. If not, see <http://www.gnu.org/licenses/>.
+
+#define EIGEN_DONT_VECTORIZE 1
+#include "main.h"
+
+// #define CUSTOM_NEW_DELETE(TYPE)
+
+void* operator new[] (size_t n)
+  {
+    ei_assert(false && "operator new should never be called with fixed size path");
+    // the following is in case assertion are disabled
+    std::cerr << "operator new should never be called with fixed size path" << std::endl;
+    exit(2);
+    void* p = malloc(n);
+    return p;
+  }
+
+void operator delete[](void* p) throw()
+{
+  free(p);
+}
+
+template<typename MatrixType> void nomalloc(const MatrixType& m)
+{
+  /* this test check no dynamic memory allocation are issued with fixed-size matrices
+  */
+
+  typedef typename MatrixType::Scalar Scalar;
+  typedef Matrix<Scalar, MatrixType::RowsAtCompileTime, 1> VectorType;
+
+  int rows = m.rows();
+  int cols = m.cols();
+
+  // this test relies a lot on Random.h, and there's not much more that we can do
+  // to test it, hence I consider that we will have tested Random.h
+  MatrixType m1 = MatrixType::random(rows, cols),
+             m2 = MatrixType::random(rows, cols),
+             m3(rows, cols),
+             mzero = MatrixType::zero(rows, cols),
+             identity = Matrix<Scalar, MatrixType::RowsAtCompileTime, MatrixType::RowsAtCompileTime>
+                              ::identity(rows, rows),
+             square = Matrix<Scalar, MatrixType::RowsAtCompileTime, MatrixType::RowsAtCompileTime>
+                              ::random(rows, rows);
+  VectorType v1 = VectorType::random(rows),
+             v2 = VectorType::random(rows),
+             vzero = VectorType::zero(rows);
+
+  Scalar s1 = ei_random<Scalar>();
+
+  int r = ei_random<int>(0, rows-1),
+      c = ei_random<int>(0, cols-1);
+
+  VERIFY_IS_APPROX((m1+m2)*s1,              s1*m1+s1*m2);
+  VERIFY_IS_APPROX((m1+m2)(r,c), (m1(r,c))+(m2(r,c)));
+  VERIFY_IS_APPROX(m1.cwiseProduct(m1.block(0,0,rows,cols)), m1.cwiseProduct(m1));
+  VERIFY_IS_APPROX((m1*m1.transpose())*m2,  m1*(m1.transpose()*m2));
+}
+
+void test_nomalloc()
+{
+  // check that our operator new is indeed called:
+  VERIFY_RAISES_ASSERT(MatrixXd dummy = MatrixXd::random(3,3));
+  CALL_SUBTEST( nomalloc(Matrix<float, 1, 1>()) );
+  CALL_SUBTEST( nomalloc(Matrix4d()) );
+}
-- 
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