Pull request 2119: 6570-querylog-size-memory

Updates #6570.

Squashed commit of the following:

commit 92b2723ac1b2a78138a55cb82a3222f66119bbda
Merge: 2da12283b 0143c3aac
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Tue Jan 9 17:07:23 2024 +0300

    Merge branch 'master' into 6570-querylog-size-memory

commit 2da12283b5f504fa77f08fa6026fa9a57b806b38
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Tue Jan 9 17:04:54 2024 +0300

    all: imp tests

commit 1cb404c65d4e9981b709d689fd281253eca01f82
Merge: 5f7d20516 94d437d40
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Thu Dec 28 20:18:00 2023 +0300

    Merge branch 'master' into 6570-querylog-size-memory

commit 5f7d20516934867e1a141c19a97edb49407884ee
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Wed Dec 27 15:07:54 2023 +0300

    all: imp docs

commit 0b17cfc4243a88606c62e4b1ae893a09149655b5
Author: Stanislav Chzhen <s.chzhen@adguard.com>
Date:   Mon Dec 25 20:06:09 2023 +0300

    all: querylog size memory

internal/aghalg/ringbuffer.go

@@ -1,23 +1,15 @@
 package aghalg
 
-import (
-	"github.com/AdguardTeam/golibs/errors"
-)
-
 // RingBuffer is the implementation of ring buffer data structure.
 type RingBuffer[T any] struct {
 	buf  []T
-	cur  int
+	cur  uint
 	full bool
 }
 
 // NewRingBuffer initializes the new instance of ring buffer.  size must be
 // greater or equal to zero.
-func NewRingBuffer[T any](size int) (rb *RingBuffer[T]) {
-	if size < 0 {
-		panic(errors.Error("ring buffer: size must be greater or equal to zero"))
-	}
-
+func NewRingBuffer[T any](size uint) (rb *RingBuffer[T]) {
 	return &RingBuffer[T]{
 		buf: make([]T, size),
 	}
@@ -30,7 +22,7 @@ func (rb *RingBuffer[T]) Append(e T) {
 	}
 
 	rb.buf[rb.cur] = e
-	rb.cur = (rb.cur + 1) % cap(rb.buf)
+	rb.cur = (rb.cur + 1) % uint(cap(rb.buf))
 	if rb.cur == 0 {
 		rb.full = true
 	}
@@ -87,12 +79,12 @@ func (rb *RingBuffer[T]) splitCur() (before, after []T) {
 }
 
 // Len returns a length of the buffer.
-func (rb *RingBuffer[T]) Len() (l int) {
+func (rb *RingBuffer[T]) Len() (l uint) {
 	if !rb.full {
 		return rb.cur
 	}
 
-	return cap(rb.buf)
+	return uint(cap(rb.buf))
 }
 
 // Clear clears the buffer.