13700970930

Committed 06 Mar 2025 02:28PM CUT coverage: 99.316% (-0.07%) from 99.381%

Build # 13700970930

Build Type

Pull #146

github

Committed by

web-flow

Commit Message

Merge e072d193f into 30636e28f

Pull Request Pull Request #146: Optimize table operations

Run Details

94 of 94 new or added lines in 7 files covered. (100.0%)

4 existing lines in 1 file now uncovered.

6239 of 6282 relevant lines covered (99.32%)

29459.66 hits per line

Source File
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93.33

/ecs/column.go

package ecs

import (
        "reflect"
        "unsafe"
)

// column storage for components in an archetype.
type column struct {
        data       reflect.Value  // data buffer
        pointer    unsafe.Pointer // pointer to the first element
        isRelation bool           // whether this column is for a relation component
        target     Entity         // target entity if for a relation component
        itemSize   uintptr        // memory size of items
        len        uint32         // number of items
}

// newColumn creates a new column for a given type and capacity.
func newColumn(tp reflect.Type, isRelation bool, target Entity, capacity uint32) column {
        // TODO: should be use a slice instead of an array here?
        data := reflect.New(reflect.ArrayOf(int(capacity), tp)).Elem()
        pointer := data.Addr().UnsafePointer()

        return column{
                data:       data,
                pointer:    pointer,
                itemSize:   sizeOf(tp),
                isRelation: isRelation,
                target:     target,
                len:        0,
        }
}

// Get returns a pointer to the component at the given index.
func (c *column) Get(index uintptr) unsafe.Pointer {
        return unsafe.Add(c.pointer, index*c.itemSize)
}

func (c *column) SetLast(other *column, count uint32) {
        start := c.len - count
        src := other.Get(0)
        dst := c.Get(uintptr(start))
        copyPtr(src, dst, c.itemSize*uintptr(count))
}

// Set overwrites the component at the given index.
func (c *column) Set(index uint32, comp unsafe.Pointer) unsafe.Pointer {
        dst := c.Get(uintptr(index))
        if c.itemSize == 0 {
                return dst
        }

        copyPtr(comp, dst, uintptr(c.itemSize))
        return dst
}

// Zero resets the memory at the given index.
func (c *column) Zero(index uintptr, zero unsafe.Pointer) {
        if c.itemSize == 0 {
                return
        }
        dst := unsafe.Add(c.pointer, index*c.itemSize)
        copyPtr(zero, dst, uintptr(c.itemSize))
}

// Zero resets a block of storage in one buffer.
func (c *column) ZeroRange(start, len uint32, zero unsafe.Pointer) {
        size := uint32(c.itemSize)
        if size == 0 {
                return
        }
        var i uint32
        for i = 0; i < len; i++ {
                dst := unsafe.Add(c.pointer, (i+start)*size)
                copyPtr(zero, dst, c.itemSize)
        }
}

func (c *column) Reset(zero unsafe.Pointer) {
        len := c.len
        if c.len == 0 {
                return
        }
        c.len = 0
        if zero == nil {
                return
        }
        if len <= 64 { // A coarse estimate where manually zeroing is faster
                c.ZeroRange(0, len, zero)
        } else {
                c.data.SetZero()
        }
}

1	package ecs
2
3	import (
4	"reflect"
5	"unsafe"
6	)
7
8	// column storage for components in an archetype.
9	type column struct {
10	data reflect.Value // data buffer
11	pointer unsafe.Pointer // pointer to the first element
12	isRelation bool // whether this column is for a relation component
13	target Entity // target entity if for a relation component
14	itemSize uintptr // memory size of items
15	len uint32 // number of items
16	}
17
18	// newColumn creates a new column for a given type and capacity.
19	func newColumn(tp reflect.Type, isRelation bool, target Entity, capacity uint32) column {	2,390✔
20	// TODO: should be use a slice instead of an array here?	2,390✔
21	data := reflect.New(reflect.ArrayOf(int(capacity), tp)).Elem()	2,390✔
22	pointer := data.Addr().UnsafePointer()	2,390✔
23		2,390✔
24	return column{	2,390✔
25	data: data,	2,390✔
26	pointer: pointer,	2,390✔
27	itemSize: sizeOf(tp),	2,390✔
28	isRelation: isRelation,	2,390✔
29	target: target,	2,390✔
30	len: 0,	2,390✔
31	}	2,390✔
32	}	2,390✔
33
34	// Get returns a pointer to the component at the given index.
35	func (c *column) Get(index uintptr) unsafe.Pointer {	5,004,209✔
36	return unsafe.Add(c.pointer, index*c.itemSize)	5,004,209✔
37	}	5,004,209✔
38
39	func (c column) SetLast(other column, count uint32) {	532✔
40	start := c.len - count	532✔
41	src := other.Get(0)	532✔
42	dst := c.Get(uintptr(start))	532✔
43	copyPtr(src, dst, c.itemSize*uintptr(count))	532✔
44	}	532✔
45
46	// Set overwrites the component at the given index.
47	func (c *column) Set(index uint32, comp unsafe.Pointer) unsafe.Pointer {	1,009,912✔
48	dst := c.Get(uintptr(index))	1,009,912✔
49	if c.itemSize == 0 {	1,011,038✔
50	return dst	1,126✔
51	}	1,126✔
52
53	copyPtr(comp, dst, uintptr(c.itemSize))	1,008,786✔
54	return dst	1,008,786✔
55	}
56
57	// Zero resets the memory at the given index.
58	func (c *column) Zero(index uintptr, zero unsafe.Pointer) {	499,910✔
59	if c.itemSize == 0 {	500,131✔
60	return	221✔
61	}	221✔
62	dst := unsafe.Add(c.pointer, index*c.itemSize)	499,689✔
63	copyPtr(zero, dst, uintptr(c.itemSize))	499,689✔
64	}
65
66	// Zero resets a block of storage in one buffer.
67	func (c *column) ZeroRange(start, len uint32, zero unsafe.Pointer) {	587✔
68	size := uint32(c.itemSize)	587✔
69	if size == 0 {	604✔
70	return	17✔
71	}	17✔
72	var i uint32	570✔
73	for i = 0; i < len; i++ {	7,713✔
74	dst := unsafe.Add(c.pointer, (i+start)*size)	7,143✔
75	copyPtr(zero, dst, c.itemSize)	7,143✔
76	}	7,143✔
77	}
78
79	func (c *column) Reset(zero unsafe.Pointer) {	771✔
80	len := c.len	771✔
81	if c.len == 0 {	771✔
UNCOV 82	return	×
UNCOV 83	}	×
84	c.len = 0	771✔
85	if zero == nil {	955✔
86	return	184✔
87	}	184✔
88	if len <= 64 { // A coarse estimate where manually zeroing is faster	1,174✔
89	c.ZeroRange(0, len, zero)	587✔
90	} else {	587✔
UNCOV 91	c.data.SetZero()	×
UNCOV 92	}	×
93	}

mlange-42 / ark / 13700970930

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