containers: Add SyncValue and SyncPool types

1 files changed, 33 insertions, 0 deletions

diff --git a/lib/containers/syncpool.go b/lib/containers/syncpool.go
new file mode 100644
index 0000000..cb5398d
--- /dev/null
+++ b/lib/containers/syncpool.go
@@ -0,0 +1,33 @@
+// Copyright (C) 2022-2023  Luke Shumaker <lukeshu@lukeshu.com>
+//
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package containers
+
+import (
+	"sync"
+)
+
+type SyncPool[T any] struct {
+	New func() T
+
+	inner sync.Pool
+}
+
+func (p *SyncPool[T]) Get() (val T, ok bool) {
+	_val := p.inner.Get()
+	switch {
+	case _val != nil:
+		//nolint:forcetypeassert // Typed wrapper around untyped lib.
+		return _val.(T), true
+	case p.New != nil:
+		return p.New(), true
+	default:
+		var zero T
+		return zero, false
+	}
+}
+
+func (p *SyncPool[T]) Put(val T) {
+	p.inner.Put(val)
+}