dynalloc.cpp File Reference

#include "main.h"

Classes
struct	MyStruct
class	MyClassA

Macros
#define	ALIGNMENT   1

Typedefs
typedef Matrix< float, 16, 1 >	Vector16f
typedef Matrix< float, 8, 1 >	Vector8f

Functions
void	check_handmade_aligned_malloc ()
void	check_aligned_malloc ()
void	check_aligned_new ()
void	check_aligned_stack_alloc ()
template<typename T >
void	check_dynaligned ()
template<typename T >
void	check_custom_new_delete ()
	EIGEN_DECLARE_TEST (dynalloc)

Macro Definition Documentation

ALIGNMENT

#define ALIGNMENT   1

Typedef Documentation

Vector16f

typedef Matrix<float, 16, 1> Vector16f

Vector8f

typedef Matrix<float, 8, 1> Vector8f

Function Documentation

check_aligned_malloc()

void check_aligned_malloc

(

)

                            {
  for (int i = ALIGNMENT; i < 1000; i++) {
    char *p = (char *)internal::aligned_malloc(i);
    VERIFY(std::uintptr_t(p) % ALIGNMENT == 0);
    // if the buffer is wrongly allocated this will give a bad write --> check with valgrind
    for (int j = 0; j < i; j++) p[j] = 0;
    internal::aligned_free(p);
  }
}

References Eigen::internal::aligned_free(), Eigen::internal::aligned_malloc(), ALIGNMENT, i, j, p, and VERIFY.

Referenced by EIGEN_DECLARE_TEST().

check_aligned_new()

void check_aligned_new

(

)

                         {
  for (int i = ALIGNMENT; i < 1000; i++) {
    float *p = internal::aligned_new<float>(i);
    VERIFY(std::uintptr_t(p) % ALIGNMENT == 0);
    // if the buffer is wrongly allocated this will give a bad write --> check with valgrind
    for (int j = 0; j < i; j++) p[j] = 0;
    internal::aligned_delete(p, i);
  }
}

References Eigen::internal::aligned_delete(), ALIGNMENT, i, j, p, and VERIFY.

Referenced by EIGEN_DECLARE_TEST().

check_aligned_stack_alloc()

void check_aligned_stack_alloc

(

)

                                 {
  for (int i = ALIGNMENT; i < 400; i++) {
    ei_declare_aligned_stack_constructed_variable(float, p, i, 0);
    VERIFY(std::uintptr_t(p) % ALIGNMENT == 0);
    // if the buffer is wrongly allocated this will give a bad write --> check with valgrind
    for (int j = 0; j < i; j++) p[j] = 0;
  }
}

References ALIGNMENT, ei_declare_aligned_stack_constructed_variable, i, j, p, and VERIFY.

Referenced by EIGEN_DECLARE_TEST().

check_custom_new_delete()

template<typename T >

void check_custom_new_delete

(

)

                               {
  {
    T *t = new T;
    delete t;
  }
 
  {
    std::size_t N = internal::random<std::size_t>(1, 10);
    T *t = new T[N];
    delete[] t;
  }
 
#if EIGEN_MAX_ALIGN_BYTES > 0 && (!EIGEN_HAS_CXX17_OVERALIGN)
  {
    T *t = static_cast<T *>((T::operator new)(sizeof(T)));
    (T::operator delete)(t, sizeof(T));
  }
 
  {
    T *t = static_cast<T *>((T::operator new)(sizeof(T)));
    (T::operator delete)(t);
  }
#endif
}

References N, and plotPSD::t.

check_dynaligned()

template<typename T >

void check_dynaligned

(

)

                        {
  // TODO have to be updated once we support multiple alignment values
  if (T::SizeAtCompileTime % ALIGNMENT == 0) {
    T *obj = new T;
    VERIFY(T::NeedsToAlign == 1);
    VERIFY(std::uintptr_t(obj) % ALIGNMENT == 0);
    delete obj;
  }
}

References ALIGNMENT, and VERIFY.

check_handmade_aligned_malloc()

void check_handmade_aligned_malloc

(

)

                                     {
  // Hand-make alignment needs at least sizeof(void*) to store the offset.
  constexpr int alignment = (std::max<int>)(EIGEN_DEFAULT_ALIGN_BYTES, sizeof(void *));
 
  for (int i = 1; i < 1000; i++) {
    char *p = (char *)internal::handmade_aligned_malloc(i, alignment);
    VERIFY(std::uintptr_t(p) % ALIGNMENT == 0);
    // if the buffer is wrongly allocated this will give a bad write --> check with valgrind
    for (int j = 0; j < i; j++) p[j] = 0;
    internal::handmade_aligned_free(p);
  }
}

References ALIGNMENT, EIGEN_DEFAULT_ALIGN_BYTES, Eigen::internal::handmade_aligned_free(), Eigen::internal::handmade_aligned_malloc(), i, j, p, and VERIFY.

Referenced by EIGEN_DECLARE_TEST().

EIGEN_DECLARE_TEST()

EIGEN_DECLARE_TEST

(

dynalloc

)

                             {
  // low level dynamic memory allocation
  CALL_SUBTEST(check_handmade_aligned_malloc());
  CALL_SUBTEST(check_aligned_malloc());
  CALL_SUBTEST(check_aligned_new());
  CALL_SUBTEST(check_aligned_stack_alloc());
 
  for (int i = 0; i < g_repeat * 100; ++i) {
    CALL_SUBTEST(check_custom_new_delete<Vector4f>());
    CALL_SUBTEST(check_custom_new_delete<Vector2f>());
    CALL_SUBTEST(check_custom_new_delete<Matrix4f>());
    CALL_SUBTEST(check_custom_new_delete<MatrixXi>());
  }
 
// check static allocation, who knows ?
#if EIGEN_MAX_STATIC_ALIGN_BYTES
  for (int i = 0; i < g_repeat * 100; ++i) {
    CALL_SUBTEST(check_dynaligned<Vector4f>());
    CALL_SUBTEST(check_dynaligned<Vector2d>());
    CALL_SUBTEST(check_dynaligned<Matrix4f>());
    CALL_SUBTEST(check_dynaligned<Vector4d>());
    CALL_SUBTEST(check_dynaligned<Vector4i>());
    CALL_SUBTEST(check_dynaligned<Vector8f>());
    CALL_SUBTEST(check_dynaligned<Vector16f>());
  }
 
  {
    MyStruct foo0;
    VERIFY(std::uintptr_t(foo0.avec.data()) % ALIGNMENT == 0);
    MyClassA fooA;
    VERIFY(std::uintptr_t(fooA.avec.data()) % ALIGNMENT == 0);
  }
 
  // dynamic allocation, single object
  for (int i = 0; i < g_repeat * 100; ++i) {
    MyStruct *foo0 = new MyStruct();
    VERIFY(std::uintptr_t(foo0->avec.data()) % ALIGNMENT == 0);
    MyClassA *fooA = new MyClassA();
    VERIFY(std::uintptr_t(fooA->avec.data()) % ALIGNMENT == 0);
    delete foo0;
    delete fooA;
  }
 
  // dynamic allocation, array
  const int N = 10;
  for (int i = 0; i < g_repeat * 100; ++i) {
    MyStruct *foo0 = new MyStruct[N];
    VERIFY(std::uintptr_t(foo0->avec.data()) % ALIGNMENT == 0);
    MyClassA *fooA = new MyClassA[N];
    VERIFY(std::uintptr_t(fooA->avec.data()) % ALIGNMENT == 0);
    delete[] foo0;
    delete[] fooA;
  }
#endif
}

References ALIGNMENT, MyStruct::avec, MyClassA::avec, CALL_SUBTEST, check_aligned_malloc(), check_aligned_new(), check_aligned_stack_alloc(), check_handmade_aligned_malloc(), Eigen::PlainObjectBase< Derived >::data(), Eigen::g_repeat, i, N, and VERIFY.