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
|
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdint.h>
#include <sys/time.h>
#include <time.h>
#include <limits>
#include "base/check_op.h"
#include "base/numerics/safe_math.h"
#include "base/time/time.h"
namespace base {
// static
TimeDelta TimeDelta::FromTimeSpec(const timespec& ts) {
// TODO(crbug.com/41405098): Convert the max possible `timespec` explicitly to
// `TimeDelta::Max()`, similar to `Time::FromTimeVal`.
const TimeDelta delta = Seconds(ts.tv_sec) + Nanoseconds(ts.tv_nsec);
return delta.is_positive() ? delta : TimeDelta();
}
struct timespec TimeDelta::ToTimeSpec() const {
if (is_negative()) {
return {
.tv_sec = 0,
.tv_nsec = 0,
};
}
// TODO(crbug.com/41405098): If `time_t` is 32-bit, out of range values should
// be converted to the max possible `timespec`, specifically with `tv_nsec =
// kNanosecondsPerSecond-1`.
const int64_t extra_microseconds =
InMicroseconds() % Time::kMicrosecondsPerSecond;
return {
.tv_sec = saturated_cast<time_t>(InSeconds()),
.tv_nsec = saturated_cast<long>(extra_microseconds *
Time::kNanosecondsPerMicrosecond),
};
}
// static
Time Time::FromTimeVal(struct timeval t) {
DCHECK_LT(t.tv_usec, static_cast<int>(kMicrosecondsPerSecond));
DCHECK_GE(t.tv_usec, 0);
// TODO(crbug.com/41405098): Handle negative values including Time::Min().
if (t.tv_usec == static_cast<suseconds_t>(Time::kMicrosecondsPerSecond) - 1 &&
t.tv_sec == std::numeric_limits<time_t>::max()) {
return Max();
}
return Time::UnixEpoch() + Seconds(t.tv_sec) + Microseconds(t.tv_usec);
}
struct timeval Time::ToTimeVal() const {
if (is_null()) {
return {
.tv_sec = 0,
.tv_usec = 0,
};
}
// TODO(crbug.com/41405098): Handle negative values including Time::Min().
const int64_t us = us_ - kTimeTToMicrosecondsOffset;
return {
.tv_sec = is_max()
? std::numeric_limits<time_t>::max()
: saturated_cast<time_t>(us / Time::kMicrosecondsPerSecond),
.tv_usec =
is_max()
? static_cast<suseconds_t>(Time::kMicrosecondsPerSecond) - 1
: saturated_cast<suseconds_t>(us % Time::kMicrosecondsPerSecond),
};
}
} // namespace base
|
