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1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include "net/quic/quic_alarm.h"
6 
7 #include "base/logging.h"
8 
9 namespace net {
10 
QuicAlarm(Delegate * delegate)11 QuicAlarm::QuicAlarm(Delegate* delegate)
12     : delegate_(delegate),
13       deadline_(QuicTime::Zero()) {
14 }
15 
~QuicAlarm()16 QuicAlarm::~QuicAlarm() {}
17 
Set(QuicTime deadline)18 void QuicAlarm::Set(QuicTime deadline) {
19   DCHECK(!IsSet());
20   DCHECK(deadline.IsInitialized());
21   deadline_ = deadline;
22   SetImpl();
23 }
24 
Cancel()25 void QuicAlarm::Cancel() {
26   deadline_ = QuicTime::Zero();
27   CancelImpl();
28 }
29 
IsSet() const30 bool QuicAlarm::IsSet() const {
31   return deadline_.IsInitialized();
32 }
33 
Fire()34 void QuicAlarm::Fire() {
35   if (!deadline_.IsInitialized()) {
36     return;
37   }
38 
39   deadline_ = QuicTime::Zero();
40   QuicTime deadline = delegate_->OnAlarm();
41   // delegate_->OnAlarm() might call Set(), in which case  deadline_ will
42   // already contain the new value, so don't overwrite it.
43   if (!deadline_.IsInitialized() && deadline.IsInitialized()) {
44     Set(deadline);
45   }
46 }
47 
48 }  // namespace net
49