Project import generated by Copybara.
PiperOrigin-RevId: 237361882
Change-Id: I109a68f44db867b20f8c6a7732b0ce657133e52a
diff --git a/quic/core/quic_alarm.cc b/quic/core/quic_alarm.cc
new file mode 100644
index 0000000..e31c7aa
--- /dev/null
+++ b/quic/core/quic_alarm.cc
@@ -0,0 +1,73 @@
+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/third_party/quiche/src/quic/core/quic_alarm.h"
+
+namespace quic {
+
+QuicAlarm::QuicAlarm(QuicArenaScopedPtr<Delegate> delegate)
+ : delegate_(std::move(delegate)), deadline_(QuicTime::Zero()) {}
+
+QuicAlarm::~QuicAlarm() {}
+
+void QuicAlarm::Set(QuicTime new_deadline) {
+ DCHECK(!IsSet());
+ DCHECK(new_deadline.IsInitialized());
+ deadline_ = new_deadline;
+ SetImpl();
+}
+
+void QuicAlarm::Cancel() {
+ if (!IsSet()) {
+ // Don't try to cancel an alarm that hasn't been set.
+ return;
+ }
+ deadline_ = QuicTime::Zero();
+ CancelImpl();
+}
+
+void QuicAlarm::Update(QuicTime new_deadline, QuicTime::Delta granularity) {
+ if (!new_deadline.IsInitialized()) {
+ Cancel();
+ return;
+ }
+ if (std::abs((new_deadline - deadline_).ToMicroseconds()) <
+ granularity.ToMicroseconds()) {
+ return;
+ }
+ const bool was_set = IsSet();
+ deadline_ = new_deadline;
+ if (was_set) {
+ UpdateImpl();
+ } else {
+ SetImpl();
+ }
+}
+
+bool QuicAlarm::IsSet() const {
+ return deadline_.IsInitialized();
+}
+
+void QuicAlarm::Fire() {
+ if (!IsSet()) {
+ return;
+ }
+
+ deadline_ = QuicTime::Zero();
+ delegate_->OnAlarm();
+}
+
+void QuicAlarm::UpdateImpl() {
+ // CancelImpl and SetImpl take the new deadline by way of the deadline_
+ // member, so save and restore deadline_ before canceling.
+ const QuicTime new_deadline = deadline_;
+
+ deadline_ = QuicTime::Zero();
+ CancelImpl();
+
+ deadline_ = new_deadline;
+ SetImpl();
+}
+
+} // namespace quic
