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Add FixedVector template.

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This is a high performance `Vector`-like object that can be used if the maximum number of objects is small and known, and the objects are needed only temporarily.
This commit is contained in:
Lukas Tenbrink
2025-04-30 19:08:07 +02:00
parent 32eafc18b4
commit 1b1ab76a14
3 changed files with 271 additions and 0 deletions
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107
tests/core/templates/test_fixed_vector.h Normal file
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/**************************************************************************/
/* test_fixed_vector.h */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#pragma once
#include "core/templates/fixed_vector.h"
#include "tests/test_macros.h"
namespace TestFixedVector {
TEST_CASE("[FixedVector] Basic Checks") {
FixedVector<uint16_t, 1> vector;
CHECK_EQ(vector.capacity(), 1);
CHECK_EQ(vector.size(), 0);
CHECK(vector.is_empty());
CHECK(!vector.is_full());
vector.push_back(5);
CHECK_EQ(vector.size(), 1);
CHECK_EQ(vector[0], 5);
CHECK_EQ(vector.ptr()[0], 5);
CHECK(!vector.is_empty());
CHECK(vector.is_full());
vector.pop_back();
CHECK_EQ(vector.size(), 0);
CHECK(vector.is_empty());
CHECK(!vector.is_full());
FixedVector<uint16_t, 2> vector1 = { 1, 2 };
CHECK_EQ(vector1.capacity(), 2);
CHECK_EQ(vector1.size(), 2);
CHECK_EQ(vector1[0], 1);
CHECK_EQ(vector1[1], 2);
FixedVector<uint16_t, 3> vector2(vector1);
CHECK_EQ(vector2.capacity(), 3);
CHECK_EQ(vector2.size(), 2);
CHECK_EQ(vector2[0], 1);
CHECK_EQ(vector2[1], 2);
FixedVector<Variant, 3> vector_variant;
CHECK_EQ(vector_variant.size(), 0);
CHECK_EQ(vector_variant.capacity(), 3);
vector_variant.resize_initialized(3);
vector_variant[0] = "Test";
vector_variant[1] = 1;
CHECK_EQ(vector_variant.capacity(), 3);
CHECK_EQ(vector_variant.size(), 3);
CHECK_EQ(vector_variant[0], "Test");
CHECK_EQ(vector_variant[1], Variant(1));
CHECK_EQ(vector_variant[2].get_type(), Variant::NIL);
}
TEST_CASE("[FixedVector] Alignment Checks") {
FixedVector<uint16_t, 4> vector_uint16;
vector_uint16.resize_uninitialized(4);
CHECK((size_t)&vector_uint16[0] % alignof(uint16_t) == 0);
CHECK((size_t)&vector_uint16[1] % alignof(uint16_t) == 0);
CHECK((size_t)&vector_uint16[2] % alignof(uint16_t) == 0);
CHECK((size_t)&vector_uint16[3] % alignof(uint16_t) == 0);
FixedVector<uint32_t, 4> vector_uint32;
vector_uint32.resize_uninitialized(4);
CHECK((size_t)&vector_uint32[0] % alignof(uint32_t) == 0);
CHECK((size_t)&vector_uint32[1] % alignof(uint32_t) == 0);
CHECK((size_t)&vector_uint32[2] % alignof(uint32_t) == 0);
CHECK((size_t)&vector_uint32[3] % alignof(uint32_t) == 0);
FixedVector<uint64_t, 4> vector_uint64;
vector_uint64.resize_uninitialized(4);
CHECK((size_t)&vector_uint64[0] % alignof(uint64_t) == 0);
CHECK((size_t)&vector_uint64[1] % alignof(uint64_t) == 0);
CHECK((size_t)&vector_uint64[2] % alignof(uint64_t) == 0);
CHECK((size_t)&vector_uint64[3] % alignof(uint64_t) == 0);
}
} //namespace TestFixedVector