sync: migrate ai-operator to Gitea (2026-08-10)

internal/asterisk/ari/lock.go

@@ -0,0 +1,33 @@
+package ari
+
+import (
+	"fmt"
+	"os"
+	"syscall"
+)
+
+type LockFile struct {
+	path string
+	file *os.File
+}
+
+func AcquireLock(path string) (*LockFile, error) {
+	file, err := os.OpenFile(path, os.O_CREATE|os.O_RDWR, 0600)
+	if err != nil {
+		return nil, err
+	}
+	if err := syscall.Flock(int(file.Fd()), syscall.LOCK_EX|syscall.LOCK_NB); err != nil {
+		_ = file.Close()
+		return nil, fmt.Errorf("ARI events listener lock is already held: %s", path)
+	}
+	_, _ = file.WriteString(fmt.Sprintf("%d\n", os.Getpid()))
+	return &LockFile{path: path, file: file}, nil
+}
+
+func (l *LockFile) Release() error {
+	if l == nil || l.file == nil {
+		return nil
+	}
+	_ = syscall.Flock(int(l.file.Fd()), syscall.LOCK_UN)
+	return l.file.Close()
+}