Adding upstream version 9.0.3.

Signed-off-by: Daniel Baumann <daniel@debian.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/modules/util/timer.go b/modules/util/timer.go
new file mode 100644
index 0000000..f9a7950
--- /dev/null
+++ b/modules/util/timer.go
@@ -0,0 +1,36 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package util
+
+import (
+	"sync"
+	"time"
+)
+
+func Debounce(d time.Duration) func(f func()) {
+	type debouncer struct {
+		mu sync.Mutex
+		t  *time.Timer
+	}
+	db := &debouncer{}
+
+	return func(f func()) {
+		db.mu.Lock()
+		defer db.mu.Unlock()
+
+		if db.t != nil {
+			db.t.Stop()
+		}
+		var trigger *time.Timer
+		trigger = time.AfterFunc(d, func() {
+			db.mu.Lock()
+			defer db.mu.Unlock()
+			if trigger == db.t {
+				f()
+				db.t = nil
+			}
+		})
+		db.t = trigger
+	}
+}