no need for FreeList, we have sync.Pool at home

email/message.go

@@ -12,9 +12,9 @@ package email
 
 import (
 	"fmt"
+	"sync"
 
 	"git.erbosoft.com/amy/amsterdam/config"
-	"git.erbosoft.com/amy/amsterdam/util"
 	"github.com/CloudyKit/jet/v6"
 )
 
@@ -51,7 +51,7 @@ type amMessage struct {
 }
 
 // freeMessages is a free list for amMessage structures.
-var freeMessages util.FreeList[amMessage]
+var freeMessages sync.Pool
 
 // formatAddress outputs an E-mail address with optional name associated with it.
 func formatAddress(addr string, name string) string {
@@ -126,7 +126,7 @@ func (m *amMessage) Send() {
  *     The new Message.
  */
 func AmNewEmailMessage(sender int32, ip string) Message {
-	rc := freeMessages.Get()
+	rc := freeMessages.Get().(*amMessage)
 	if rc == nil {
 		rc = &amMessage{to: make([]string, 0), cc: make([]string, 0), bcc: make([]string, 0),
 			headers: make(map[string]string), vars: make(jet.VarMap)}

ui/amcontext.go

@@ -18,6 +18,7 @@ import (
 	"net/http"
 	"net/url"
 	"strconv"
+	"sync"
 	"time"
 
 	"git.erbosoft.com/amy/amsterdam/config"
@@ -510,7 +511,7 @@ var defoptions *AmSessionOptions = &AmSessionOptions{
 }
 
 // freeContext is a free list for amContext structures.
-var freeContext util.FreeList[amContext]
+var freeContext sync.Pool
 
 // amContextRecycleBin is the channel we put contexts on to be recycled.
 var amContextRecycleBin chan *amContext
@@ -523,7 +524,7 @@ var amContextRecycleBin chan *amContext
  *     Standard Go error status.
  */
 func newContext(ctxt echo.Context) (*amContext, error) {
-	rc := freeContext.Get()
+	rc := freeContext.Get().(*amContext)
 	if rc == nil {
 		rc = &amContext{
 			rendervars: make(jet.VarMap),

util/freelist.go

@@ -1,67 +0,0 @@
-/*
- * Amsterdam Web Communities System
- * Copyright (c) 2025 Erbosoft Metaverse Design Solutions, All Rights Reserved
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-// Package util contains utility definitions.
-package util
-
-import "sync"
-
-// freeListElem is an element of the free list.
-type freeListElem[T any] struct {
-	next *freeListElem[T]
-	prev *freeListElem[T]
-	data *T
-}
-
-// FreeList defines a free list.
-type FreeList[T any] struct {
-	New     func() *T
-	mutex   sync.Mutex
-	listptr *freeListElem[T]
-}
-
-// Put adds a value to the free list.
-func (l *FreeList[T]) Put(value *T) {
-	l.mutex.Lock()
-	defer l.mutex.Unlock()
-	ne := freeListElem[T]{data: value}
-	if l.listptr == nil {
-		ne.next = &ne
-		ne.prev = &ne
-		l.listptr = &ne
-	} else {
-		ne.next = l.listptr
-		ne.prev = l.listptr.prev
-		ne.next.prev = &ne
-		ne.prev.next = &ne
-	}
-}
-
-// Get removes a value from the free list. If there are no values and New is specified, is calls that.
-func (l *FreeList[T]) Get() *T {
-	l.mutex.Lock()
-	defer l.mutex.Unlock()
-	var rc *T = nil
-	if l.listptr == nil {
-		if l.New != nil {
-			rc = l.New()
-		}
-	} else {
-		elt := l.listptr
-		rc = elt.data
-		l.listptr = elt.next
-		if l.listptr == elt {
-			l.listptr = nil
-		} else {
-			elt.prev.next = elt.next
-			elt.next.prev = elt.prev
-		}
-	}
-	return rc
-}