From bd68ebb0474167d436d5fe58cd96289dee419b88 Mon Sep 17 00:00:00 2001
From: hunter-bera <133678627+hunter-bera@users.noreply.github.com>
Date: Wed, 3 Jul 2024 17:15:53 -0400
Subject: [PATCH] add rwlist

---
 tools/rwstore/rwlist.go           | 42 +++++++++++++++++++++++++++++++
 tools/{rwmap => rwstore}/rwmap.go |  2 +-
 2 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 tools/rwstore/rwlist.go
 rename tools/{rwmap => rwstore}/rwmap.go (98%)

diff --git a/tools/rwstore/rwlist.go b/tools/rwstore/rwlist.go
new file mode 100644
index 0000000..4df3cef
--- /dev/null
+++ b/tools/rwstore/rwlist.go
@@ -0,0 +1,42 @@
+package rwstore
+
+import "sync"
+
+type RWList[V any] struct {
+	a []V
+	sync.RWMutex
+}
+
+func NewRWList[V any]() *RWList[V] {
+	return &RWList[V]{
+		a: make([]V, 0),
+	}
+}
+
+func (rw *RWList[V]) Get(index int) (V, bool) {
+	rw.RLock()
+	defer rw.RUnlock()
+	if index < 0 || index >= len(rw.a) {
+		var zero V
+		return zero, false
+	}
+	return rw.a[index], true
+}
+
+func (rw *RWList[V]) Replace(newList []V) {
+	rw.Lock()
+	rw.a = newList
+	rw.Unlock()
+}
+
+func (rw *RWList[V]) Append(value V) {
+	rw.Lock()
+	rw.a = append(rw.a, value)
+	rw.Unlock()
+}
+
+func (rw *RWList[V]) Copy() []V {
+	rw.RLock()
+	defer rw.RUnlock()
+	return append([]V(nil), rw.a...)
+}
diff --git a/tools/rwmap/rwmap.go b/tools/rwstore/rwmap.go
similarity index 98%
rename from tools/rwmap/rwmap.go
rename to tools/rwstore/rwmap.go
index 3ddce67..4544b11 100644
--- a/tools/rwmap/rwmap.go
+++ b/tools/rwstore/rwmap.go
@@ -1,4 +1,4 @@
-package rwmap
+package rwstore
 
 import (
 	"sync"