1 files changed, 53 insertions, 0 deletions
diff --git a/eigen/test/eigen2/eigen2_nomalloc.cpp b/eigen/test/eigen2/eigen2_nomalloc.cpp
new file mode 100644
index 0000000..d34a699
--- /dev/null
+++ b/eigen/test/eigen2/eigen2_nomalloc.cpp
@@ -0,0 +1,53 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra. Eigen itself is part of the KDE project.
+//
+// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
+// Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com>
+//
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// this hack is needed to make this file compiles with -pedantic (gcc)
+#ifdef __GNUC__
+#define throw(X)
+#endif
+// discard stack allocation as that too bypasses malloc
+#define EIGEN_STACK_ALLOCATION_LIMIT 0
+// any heap allocation will raise an assert
+#define EIGEN_NO_MALLOC
+
+#include "main.h"
+
+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;
+
+  int rows = m.rows();
+  int cols = m.cols();
+
+  MatrixType m1 = MatrixType::Random(rows, cols),
+             m2 = MatrixType::Random(rows, cols);
+
+  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.cwise() * m1.block(0,0,rows,cols), m1.cwise() * m1);
+  VERIFY_IS_APPROX((m1*m1.transpose())*m2,  m1*(m1.transpose()*m2));
+}
+
+void test_eigen2_nomalloc()
+{
+  // check that our operator new is indeed called:
+  VERIFY_RAISES_ASSERT(MatrixXd dummy = MatrixXd::Random(3,3));
+  CALL_SUBTEST_1( nomalloc(Matrix<float, 1, 1>()) );
+  CALL_SUBTEST_2( nomalloc(Matrix4d()) );
+  CALL_SUBTEST_3( nomalloc(Matrix<float,32,32>()) );
+}