Update dependencies

vendor/github.com/tailscale/wireguard-go/device/pools.go

@@ -0,0 +1,121 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2017-2023 WireGuard LLC. All Rights Reserved.
+ */
+
+package device
+
+import (
+	"sync"
+)
+
+type WaitPool struct {
+	pool  sync.Pool
+	cond  sync.Cond
+	lock  sync.Mutex
+	count uint32 // Get calls not yet Put back
+	max   uint32
+}
+
+func NewWaitPool(max uint32, new func() any) *WaitPool {
+	p := &WaitPool{pool: sync.Pool{New: new}, max: max}
+	p.cond = sync.Cond{L: &p.lock}
+	return p
+}
+
+func (p *WaitPool) Get() any {
+	if p.max != 0 {
+		p.lock.Lock()
+		for p.count >= p.max {
+			p.cond.Wait()
+		}
+		p.count++
+		p.lock.Unlock()
+	}
+	return p.pool.Get()
+}
+
+func (p *WaitPool) Put(x any) {
+	p.pool.Put(x)
+	if p.max == 0 {
+		return
+	}
+	p.lock.Lock()
+	defer p.lock.Unlock()
+	p.count--
+	p.cond.Signal()
+}
+
+func (device *Device) PopulatePools() {
+	device.pool.inboundElementsContainer = NewWaitPool(PreallocatedBuffersPerPool, func() any {
+		s := make([]*QueueInboundElement, 0, device.BatchSize())
+		return &QueueInboundElementsContainer{elems: s}
+	})
+	device.pool.outboundElementsContainer = NewWaitPool(PreallocatedBuffersPerPool, func() any {
+		s := make([]*QueueOutboundElement, 0, device.BatchSize())
+		return &QueueOutboundElementsContainer{elems: s}
+	})
+	device.pool.messageBuffers = NewWaitPool(PreallocatedBuffersPerPool, func() any {
+		return new([MaxMessageSize]byte)
+	})
+	device.pool.inboundElements = NewWaitPool(PreallocatedBuffersPerPool, func() any {
+		return new(QueueInboundElement)
+	})
+	device.pool.outboundElements = NewWaitPool(PreallocatedBuffersPerPool, func() any {
+		return new(QueueOutboundElement)
+	})
+}
+
+func (device *Device) GetInboundElementsContainer() *QueueInboundElementsContainer {
+	c := device.pool.inboundElementsContainer.Get().(*QueueInboundElementsContainer)
+	c.Mutex = sync.Mutex{}
+	return c
+}
+
+func (device *Device) PutInboundElementsContainer(c *QueueInboundElementsContainer) {
+	for i := range c.elems {
+		c.elems[i] = nil
+	}
+	c.elems = c.elems[:0]
+	device.pool.inboundElementsContainer.Put(c)
+}
+
+func (device *Device) GetOutboundElementsContainer() *QueueOutboundElementsContainer {
+	c := device.pool.outboundElementsContainer.Get().(*QueueOutboundElementsContainer)
+	c.Mutex = sync.Mutex{}
+	return c
+}
+
+func (device *Device) PutOutboundElementsContainer(c *QueueOutboundElementsContainer) {
+	for i := range c.elems {
+		c.elems[i] = nil
+	}
+	c.elems = c.elems[:0]
+	device.pool.outboundElementsContainer.Put(c)
+}
+
+func (device *Device) GetMessageBuffer() *[MaxMessageSize]byte {
+	return device.pool.messageBuffers.Get().(*[MaxMessageSize]byte)
+}
+
+func (device *Device) PutMessageBuffer(msg *[MaxMessageSize]byte) {
+	device.pool.messageBuffers.Put(msg)
+}
+
+func (device *Device) GetInboundElement() *QueueInboundElement {
+	return device.pool.inboundElements.Get().(*QueueInboundElement)
+}
+
+func (device *Device) PutInboundElement(elem *QueueInboundElement) {
+	elem.clearPointers()
+	device.pool.inboundElements.Put(elem)
+}
+
+func (device *Device) GetOutboundElement() *QueueOutboundElement {
+	return device.pool.outboundElements.Get().(*QueueOutboundElement)
+}
+
+func (device *Device) PutOutboundElement(elem *QueueOutboundElement) {
+	elem.clearPointers()
+	device.pool.outboundElements.Put(elem)
+}