devtools/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2026-04-10 11:34:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

Solve a big issue with data alignment and dynamic allocation:

Browse Source 
* add a WithAlignedOperatorNew class with overloaded operator new
* make Matrix (and Quaternion, Transform, Hyperplane, etc.) use it
  if needed such that "*(new Vector4) = xpr" does not failed anymore.
* Please: make sure your classes having fixed size Eigen's vector
  or matrice attributes inherit WithAlignedOperatorNew
* add a ei_new_allocator STL memory allocator to use with STL containers.
  This allocator really calls operator new on your types (unlike GCC's
  new_allocator). Example:
  std::vector<Vector4f> data(10);
  will segfault if the vectorization is enabled, instead use:
  std::vector<Vector4f,ei_new_allocator<Vector4f> > data(10);
NOTE: you only have to worry if you deal with fixed-size matrix types
with "sizeof(matrix_type)%16==0"...
This commit is contained in:
Gael Guennebaud
2008-09-03 00:32:56 +00:00
parent d8df318d77
commit f52d119b9c
11 changed files with 294 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
test/nomalloc.cpp
View File

@@ -1,6 +1,7 @@
// 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@math.jussieu.fr>
//
// Eigen is free software; you can redistribute it and/or
@@ -29,14 +30,14 @@
#include "main.h"
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;
}
{
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()
{
@@ -54,8 +55,6 @@ template<typename MatrixType> void nomalloc(const MatrixType& m)
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),