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#include <unittest/unittest.h>
#include <thrust/sequence.h>
#include <thrust/allocate_unique.h>
#include <thrust/universal_vector.h>
#include <thrust/type_traits/is_contiguous_iterator.h>
#include <numeric>
#include <vector>
namespace
{
// The managed_memory_pointer class should be identified as a
// contiguous_iterator
THRUST_STATIC_ASSERT(
thrust::is_contiguous_iterator<thrust::universal_allocator<int>::pointer>::value);
template <typename T>
struct some_object {
some_object(T data)
: m_data(data)
{}
void setter(T data) { m_data = data; }
T getter() const { return m_data; }
private:
T m_data;
};
} // namespace
template <typename T>
void TestUniversalAllocateUnique()
{
// Simple test to ensure that pointers created with universal_memory_resource
// can be dereferenced and used with STL code. This is necessary as some
// STL implementations break when using fancy references that overload
// operator&, so universal_memory_resource uses a special pointer type that
// returns regular C++ references that can be safely used host-side.
// These operations fail to compile with fancy references:
auto raw = thrust::allocate_unique<T>(thrust::universal_allocator<T>{}, 42);
auto obj = thrust::allocate_unique<some_object<T>>(
thrust::universal_allocator<some_object<T> >{}, 42
);
static_assert(
std::is_same<decltype(raw.get()),
thrust::universal_ptr<T> >::value,
"Unexpected pointer type returned from std::unique_ptr::get.");
static_assert(
std::is_same<decltype(obj.get()),
thrust::universal_ptr<some_object<T> > >::value,
"Unexpected pointer type returned from std::unique_ptr::get.");
ASSERT_EQUAL(*raw, T(42));
ASSERT_EQUAL(*raw.get(), T(42));
ASSERT_EQUAL(obj->getter(), T(42));
ASSERT_EQUAL((*obj).getter(), T(42));
ASSERT_EQUAL(obj.get()->getter(), T(42));
ASSERT_EQUAL((*obj.get()).getter(), T(42));
}
DECLARE_GENERIC_UNITTEST(TestUniversalAllocateUnique);
template <typename T>
void TestUniversalIterationRaw()
{
auto array = thrust::allocate_unique_n<T>(
thrust::universal_allocator<T>{}, 6, 42);
static_assert(
std::is_same<decltype(array.get()), thrust::universal_ptr<T> >::value,
"Unexpected pointer type returned from std::unique_ptr::get.");
for (auto iter = array.get(), end = array.get() + 6; iter < end; ++iter)
{
ASSERT_EQUAL(*iter, T(42));
ASSERT_EQUAL(*iter.get(), T(42));
}
}
DECLARE_GENERIC_UNITTEST(TestUniversalIterationRaw);
template <typename T>
void TestUniversalIterationObj()
{
auto array = thrust::allocate_unique_n<some_object<T>>(
thrust::universal_allocator<some_object<T>>{}, 6, 42);
static_assert(
std::is_same<decltype(array.get()),
thrust::universal_ptr<some_object<T>>>::value,
"Unexpected pointer type returned from std::unique_ptr::get.");
for (auto iter = array.get(), end = array.get() + 6; iter < end; ++iter)
{
ASSERT_EQUAL(iter->getter(), T(42));
ASSERT_EQUAL((*iter).getter(), T(42));
ASSERT_EQUAL(iter.get()->getter(), T(42));
ASSERT_EQUAL((*iter.get()).getter(), T(42));
}
}
DECLARE_GENERIC_UNITTEST(TestUniversalIterationObj);
template <typename T>
void TestUniversalRawPointerCast()
{
auto obj = thrust::allocate_unique<T>(thrust::universal_allocator<T>{}, 42);
static_assert(
std::is_same<decltype(obj.get()), thrust::universal_ptr<T>>::value,
"Unexpected pointer type returned from std::unique_ptr::get.");
static_assert(
std::is_same<decltype(thrust::raw_pointer_cast(obj.get())), T*>::value,
"Unexpected pointer type returned from thrust::raw_pointer_cast.");
*thrust::raw_pointer_cast(obj.get()) = T(17);
ASSERT_EQUAL(*obj, T(17));
}
DECLARE_GENERIC_UNITTEST(TestUniversalRawPointerCast);
template <typename T>
void TestUniversalThrustVector(std::size_t const n)
{
thrust::host_vector<T> host(n);
thrust::universal_vector<T> universal(n);
static_assert(
std::is_same<typename std::decay<decltype(universal)>::type::pointer,
thrust::universal_ptr<T>>::value,
"Unexpected thrust::universal_vector pointer type.");
thrust::sequence(host.begin(), host.end(), 0);
thrust::sequence(universal.begin(), universal.end(), 0);
ASSERT_EQUAL(host.size(), n);
ASSERT_EQUAL(universal.size(), n);
ASSERT_EQUAL(host, universal);
}
DECLARE_VARIABLE_UNITTEST(TestUniversalThrustVector);
// Verify that a std::vector using the universal allocator will work with
// Standard Library algorithms.
template <typename T>
void TestUniversalStdVector(std::size_t const n)
{
std::vector<T> host(n);
std::vector<T, thrust::universal_allocator<T>> universal(n);
static_assert(
std::is_same<typename std::decay<decltype(universal)>::type::pointer,
thrust::universal_ptr<T>>::value,
"Unexpected std::vector pointer type.");
std::iota(host.begin(), host.end(), 0);
std::iota(universal.begin(), universal.end(), 0);
ASSERT_EQUAL(host.size(), n);
ASSERT_EQUAL(universal.size(), n);
ASSERT_EQUAL(host, universal);
}
DECLARE_VARIABLE_UNITTEST(TestUniversalStdVector);
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