1/*
2 * Copyright (c) 2021 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include "ecmascript/dfx/vmstat/caller_stat.h"
17
18namespace panda::ecmascript {
19void PandaRuntimeTimer::Start(PandaRuntimeCallerStat *callerStat, PandaRuntimeTimer *parent)
20{
21    parent_ = parent;
22    callerStat_ = callerStat;
23    uint64_t nowTime = Now();
24    if (parent != nullptr) {
25        parent_->Pause(nowTime);
26    }
27    Resume(nowTime);
28}
29
30PandaRuntimeTimer *PandaRuntimeTimer::Stop()
31{
32    uint64_t nowTime = Now();
33    Pause(nowTime);
34    if (parent_ != nullptr) {
35        parent_->Resume(nowTime);
36    }
37    UpdateCallerState();
38    elapsed_ = 0;
39    return parent_;
40}
41
42void PandaRuntimeTimer::Pause(uint64_t now)
43{
44    if (!IsStarted()) {
45        return;
46    }
47    elapsed_ += (now - start_);
48    start_ = 0;
49}
50
51void PandaRuntimeTimer::Resume(uint64_t now)
52{
53    if (IsStarted()) {
54        return;
55    }
56    start_ = now;
57}
58
59void PandaRuntimeTimer::Snapshot()
60{
61    uint64_t nowTime = Now();
62    Pause(nowTime);
63
64    PandaRuntimeTimer *timer = this;
65    while (timer != nullptr) {
66        timer->UpdateCallerState();
67        timer = timer->parent_;
68    }
69    Resume(nowTime);
70}
71}  // namespace panda::ecmascript