1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/*
* Copyright 2019 The Android Open Source Project
*
* 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
*
* http://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.
*/
#pragma once
#include <chrono>
#include <cmath>
#include <functional>
#include <string>
#include <cutils/compiler.h>
#include <utils/Trace.h>
namespace std {
template <class Rep, class Period>
bool signbit(std::chrono::duration<Rep, Period> v) {
return signbit(std::chrono::duration_cast<std::chrono::nanoseconds>(v).count());
}
} // namespace std
namespace android {
namespace {
template <typename T>
int64_t to_int64(T v) {
return int64_t(v);
}
template <class Rep, class Period>
int64_t to_int64(std::chrono::duration<Rep, Period> v) {
return int64_t(v.count());
}
} // namespace
template <typename T>
class TracedOrdinal {
public:
static_assert(std::is_same<bool, T>() || (std::is_signed<T>() && std::is_integral<T>()) ||
std::is_same<std::chrono::nanoseconds, T>(),
"Type is not supported. Please test it with systrace before adding "
"it to the list.");
TracedOrdinal(std::string name, T initialValue)
: mName(std::move(name)),
mHasGoneNegative(std::signbit(initialValue)),
mData(initialValue) {
trace();
}
T get() const { return mData; }
operator T() const { return get(); }
TracedOrdinal& operator=(T other) {
mData = other;
mHasGoneNegative = mHasGoneNegative || std::signbit(mData);
trace();
return *this;
}
private:
void trace() {
if (CC_LIKELY(!ATRACE_ENABLED())) {
return;
}
if (mNameNegative.empty()) {
mNameNegative = mName + "Negative";
}
if (!std::signbit(mData)) {
ATRACE_INT64(mName.c_str(), to_int64(mData));
if (mHasGoneNegative) {
ATRACE_INT64(mNameNegative.c_str(), 0);
}
} else {
ATRACE_INT64(mNameNegative.c_str(), -to_int64(mData));
ATRACE_INT64(mName.c_str(), 0);
}
}
const std::string mName;
std::string mNameNegative;
bool mHasGoneNegative;
T mData;
};
} // namespace android
|
