global: begin modularization

device/pools.go

@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2017-2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package device
+
+import "sync"
+
+func (device *Device) PopulatePools() {
+	if PreallocatedBuffersPerPool == 0 {
+		device.pool.messageBufferPool = &sync.Pool{
+			New: func() interface{} {
+				return new([MaxMessageSize]byte)
+			},
+		}
+		device.pool.inboundElementPool = &sync.Pool{
+			New: func() interface{} {
+				return new(QueueInboundElement)
+			},
+		}
+		device.pool.outboundElementPool = &sync.Pool{
+			New: func() interface{} {
+				return new(QueueOutboundElement)
+			},
+		}
+	} else {
+		device.pool.messageBufferReuseChan = make(chan *[MaxMessageSize]byte, PreallocatedBuffersPerPool)
+		for i := 0; i < PreallocatedBuffersPerPool; i += 1 {
+			device.pool.messageBufferReuseChan <- new([MaxMessageSize]byte)
+		}
+		device.pool.inboundElementReuseChan = make(chan *QueueInboundElement, PreallocatedBuffersPerPool)
+		for i := 0; i < PreallocatedBuffersPerPool; i += 1 {
+			device.pool.inboundElementReuseChan <- new(QueueInboundElement)
+		}
+		device.pool.outboundElementReuseChan = make(chan *QueueOutboundElement, PreallocatedBuffersPerPool)
+		for i := 0; i < PreallocatedBuffersPerPool; i += 1 {
+			device.pool.outboundElementReuseChan <- new(QueueOutboundElement)
+		}
+	}
+}
+
+func (device *Device) GetMessageBuffer() *[MaxMessageSize]byte {
+	if PreallocatedBuffersPerPool == 0 {
+		return device.pool.messageBufferPool.Get().(*[MaxMessageSize]byte)
+	} else {
+		return <-device.pool.messageBufferReuseChan
+	}
+}
+
+func (device *Device) PutMessageBuffer(msg *[MaxMessageSize]byte) {
+	if PreallocatedBuffersPerPool == 0 {
+		device.pool.messageBufferPool.Put(msg)
+	} else {
+		device.pool.messageBufferReuseChan <- msg
+	}
+}
+
+func (device *Device) GetInboundElement() *QueueInboundElement {
+	if PreallocatedBuffersPerPool == 0 {
+		return device.pool.inboundElementPool.Get().(*QueueInboundElement)
+	} else {
+		return <-device.pool.inboundElementReuseChan
+	}
+}
+
+func (device *Device) PutInboundElement(msg *QueueInboundElement) {
+	if PreallocatedBuffersPerPool == 0 {
+		device.pool.inboundElementPool.Put(msg)
+	} else {
+		device.pool.inboundElementReuseChan <- msg
+	}
+}
+
+func (device *Device) GetOutboundElement() *QueueOutboundElement {
+	if PreallocatedBuffersPerPool == 0 {
+		return device.pool.outboundElementPool.Get().(*QueueOutboundElement)
+	} else {
+		return <-device.pool.outboundElementReuseChan
+	}
+}
+
+func (device *Device) PutOutboundElement(msg *QueueOutboundElement) {
+	if PreallocatedBuffersPerPool == 0 {
+		device.pool.outboundElementPool.Put(msg)
+	} else {
+		device.pool.outboundElementReuseChan <- msg
+	}
+}