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/*
* (C) Copyright 2024- ECMWF.
*
* This software is licensed under the terms of the Apache Licence Version 2.0
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
* In applying this licence, ECMWF does not waive the privileges and immunities
* granted to it by virtue of its status as an intergovernmental organisation
* nor does it submit to any jurisdiction.
*/
#include "pluto_testing.h"
#include <cstddef>
#include <iostream>
#include <string>
#include <limits>
#include <vector>
#include "pluto/pluto.h"
struct alignas(32) Vec3D_alignment32 {
double x;
double y;
double z;
static std::string type() { return "Vec3D_alignment32"; }
};
struct Vec3D {
double x;
double y;
double z;
static std::string type() { return "Vec3D"; }
};
std::size_t get_alignment(void* ptr) {
for (std::size_t alignment : {2056,1024,512,256,128,64,32,16,8,4}) {
if (pluto::is_aligned(ptr, alignment)) {
return alignment;
}
}
return 0;
}
template<typename T>
struct Allocated {
Allocated(const pluto::allocator<T>& alloc): alloc_(alloc) {
data = alloc_.allocate(1);
}
~Allocated() {
alloc_.deallocate(data, 1);
}
T* data;
pluto::allocator<T> alloc_;
};
template<typename Vec>
void run_case() {
std::cerr << "Case: vector<" << Vec::type() << ">" << std::endl;
int N = 5;
std::vector<Vec, pluto::host::allocator<Vec>> vec(N);
// We expect the pluto::host::allocator to use pluto::host_resource, which aligns to pluto::default_alignment
EXPECT( pluto::is_aligned(vec.data(), pluto::default_alignment()) );
std::size_t alignment = std::numeric_limits<std::size_t>::max();
for (auto& element: vec) {
EXPECT( pluto::is_aligned(&element, alignof(Vec)) );
alignment = std::min(alignment, get_alignment(&element));
std::cerr << " element alignment = " << get_alignment(&element) << std::endl;
}
std::cerr << " minimum alignment = " << alignment << std::endl;
}
int main([[maybe_unused]] int argc, [[maybe_unused]] char* argv[]) {
std::cerr << "TEST begin" << std::endl;
static_assert(alignof(Vec3D_alignment32) == 32);
run_case<Vec3D>();
run_case<Vec3D_alignment32>();
{
auto test = [](const std::string& alloc_str, const pluto::allocator<int>& allocator, std::size_t expected_alignment) {
std::cerr << "Case: alignment of " << alloc_str << std::endl;
Allocated<int> allocated(allocator);
EXPECT(pluto::is_aligned(allocated.data, expected_alignment));
};
#define TEST(allocator, expected_alignment) test(#allocator, allocator, expected_alignment);
TEST(pluto::allocator<int>(), alignof(int)); // by default uses pluto::new_delete_resource()
TEST(pluto::host::allocator<int>(), pluto::default_alignment()); // by default uses pluto::host_resource()
TEST(pluto::device::allocator<int>(), pluto::default_alignment()); // by default uses pluto::device_resource()
TEST(pluto::new_delete_resource(), alignof(double));
TEST(pluto::host_resource(), pluto::default_alignment());
TEST(pluto::device_resource(), pluto::default_alignment());
TEST(pluto::managed_resource(), pluto::default_alignment());
TEST(pluto::host_pool_resource(), pluto::default_alignment());
TEST(pluto::device_pool_resource(), pluto::default_alignment());
TEST(pluto::managed_pool_resource(), pluto::default_alignment());
}
return pluto_testing_return();
}
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