chore: import upstream snapshot with attribution

2026-07-13 12:25:30 +08:00
commit 680845cb1c
445 changed files with 103779 additions and 0 deletions
@@ -0,0 +1,87 @@
+//===----------------------------------------------------------------------===//
+// Copyright © 2025-2026 Apple Inc. and the Containerization project authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//===----------------------------------------------------------------------===//
+
+import Foundation
+import Logging
+
+actor TimeSyncer {
+    private var task: Task<Void, Never>?
+    private var context: Vminitd?
+    private var paused: Bool
+    private let logger: Logger?
+
+    init(logger: Logger?) {
+        self.paused = false
+        self.logger = logger
+    }
+
+    func start(context: Vminitd, interval: Duration = .seconds(30)) {
+        guard self.task == nil else {
+            return
+        }
+
+        self.context = context
+        self.task = Task {
+            while true {
+                do {
+                    do {
+                        try await Task.sleep(for: interval)
+                    } catch {
+                        return
+                    }
+
+                    guard !paused else {
+                        continue
+                    }
+
+                    var timeval = timeval()
+                    guard gettimeofday(&timeval, nil) == 0 else {
+                        throw POSIXError.fromErrno()
+                    }
+
+                    try await context.setTime(
+                        sec: Int64(timeval.tv_sec),
+                        usec: Int32(timeval.tv_usec)
+                    )
+                } catch {
+                    self.logger?.error("failed to sync time with guest agent: \(error)")
+                }
+            }
+        }
+    }
+
+    func pause() async {
+        self.paused = true
+    }
+
+    func resume() async {
+        self.paused = false
+    }
+
+    func close() async throws {
+        guard let task else {
+            // Already closed, nop.
+            return
+        }
+
+        task.cancel()
+        await task.value
+
+        try await self.context?.close()
+        self.task = nil
+        self.context = nil
+    }
+}