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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 | |
| 11 QuicAlarm::QuicAlarm(Delegate* delegate) | |
| 12 : delegate_(delegate), | |
| 13 deadline_(QuicTime::Zero()) { | |
| 14 } | |
| 15 | |
| 16 QuicAlarm::~QuicAlarm() {} | |
| 17 | |
| 18 void QuicAlarm::Set(QuicTime deadline) { | |
| 19 DCHECK(!IsSet()); | |
| 20 DCHECK(deadline.IsInitialized()); | |
| 21 deadline_ = deadline; | |
| 22 SetImpl(); | |
| 23 } | |
| 24 | |
| 25 void QuicAlarm::Cancel() { | |
| 26 deadline_ = QuicTime::Zero(); | |
| 27 CancelImpl(); | |
| 28 } | |
| 29 | |
| 30 void QuicAlarm::Update(QuicTime deadline, QuicTime::Delta granularity) { | |
| 31 if (!deadline.IsInitialized()) { | |
| 32 Cancel(); | |
| 33 return; | |
| 34 } | |
| 35 if (std::abs(deadline.Subtract(deadline_).ToMicroseconds()) < | |
| 36 granularity.ToMicroseconds()) { | |
| 37 return; | |
| 38 } | |
| 39 Cancel(); | |
| 40 Set(deadline); | |
| 41 } | |
| 42 | |
| 43 bool QuicAlarm::IsSet() const { | |
| 44 return deadline_.IsInitialized(); | |
| 45 } | |
| 46 | |
| 47 void QuicAlarm::Fire() { | |
| 48 if (!deadline_.IsInitialized()) { | |
| 49 return; | |
| 50 } | |
| 51 | |
| 52 deadline_ = QuicTime::Zero(); | |
| 53 QuicTime deadline = delegate_->OnAlarm(); | |
| 54 // delegate_->OnAlarm() might call Set(), in which case deadline_ will | |
| 55 // already contain the new value, so don't overwrite it. | |
| 56 if (!deadline_.IsInitialized() && deadline.IsInitialized()) { | |
| 57 Set(deadline); | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 } // namespace net | |
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