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1 // Copyright 2014 The Crashpad Authors. All rights reserved. | 1 // Copyright 2014 The Crashpad Authors. All rights reserved. |
2 // | 2 // |
3 // Licensed under the Apache License, Version 2.0 (the "License"); | 3 // Licensed under the Apache License, Version 2.0 (the "License"); |
4 // you may not use this file except in compliance with 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 | 5 // You may obtain a copy of the License at |
6 // | 6 // |
7 // http://www.apache.org/licenses/LICENSE-2.0 | 7 // http://www.apache.org/licenses/LICENSE-2.0 |
8 // | 8 // |
9 // Unless required by applicable law or agreed to in writing, software | 9 // Unless required by applicable law or agreed to in writing, software |
10 // distributed under the License is distributed on an "AS IS" BASIS, | 10 // distributed under the License is distributed on an "AS IS" BASIS, |
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
12 // See the License for the specific language governing permissions and | 12 // See the License for the specific language governing permissions and |
13 // limitations under the License. | 13 // limitations under the License. |
14 | 14 |
15 #include "util/misc/clock.h" | 15 #include "util/misc/clock.h" |
16 | 16 |
17 #include <time.h> | 17 #include <windows.h> |
18 | |
19 #include "base/logging.h" | |
20 #include "base/posix/eintr_wrapper.h" | |
21 #include "build/build_config.h" | |
22 | |
23 namespace { | |
24 | |
25 const uint64_t kNanosecondsPerSecond = 1E9; | |
26 | |
27 } // namespace | |
28 | 18 |
29 namespace crashpad { | 19 namespace crashpad { |
30 | 20 |
31 #if !defined(OS_MACOSX) | 21 uint64_t ClockMonotonicNanoseconds() { |
22 LARGE_INTEGER frequency; | |
23 LARGE_INTEGER time; | |
32 | 24 |
33 uint64_t ClockMonotonicNanoseconds() { | 25 QueryPerformanceFrequency(&frequency); |
Mark Mentovai
2014/12/16 23:06:54
Cache this like we do in clock_mac.cc? (TimebaseIn
Mark Mentovai
2014/12/16 23:06:54
PCHECK() or DPCHECK() this and QueryPerformanceCou
scottmg
2014/12/17 01:01:28
Done.
scottmg
2014/12/17 01:01:28
They can't fail on XP or later, so I prefer not to
| |
34 timespec now; | 26 QueryPerformanceCounter(&time); |
35 int rv = clock_gettime(CLOCK_MONOTONIC, &now); | |
36 DPCHECK(rv == 0) << "clock_gettime"; | |
37 | 27 |
38 return now.tv_sec * kNanosecondsPerSecond + now.tv_nsec; | 28 // |time| is the elapsed number of ticks, and we have the number of |
29 // ticks-per-second. Use this to convert to the number of nanoseconds. | |
30 time.QuadPart *= 1000000000; | |
Mark Mentovai
2014/12/16 23:06:54
Fear of overflow: what kind of number is frequency
Mark Mentovai
2014/12/16 23:06:54
1E9 or kNanosecondsPerSecond = 1E9?
scottmg
2014/12/17 01:01:28
Done.
scottmg
2014/12/17 01:01:28
Done.
| |
31 time.QuadPart /= frequency.QuadPart; | |
32 | |
33 return time.QuadPart; | |
39 } | 34 } |
40 | 35 |
41 #endif | |
42 | |
43 void SleepNanoseconds(uint64_t nanoseconds) { | 36 void SleepNanoseconds(uint64_t nanoseconds) { |
44 timespec sleep_time; | 37 // This is both inaccurate (will be way too long for short sleeps) and |
45 sleep_time.tv_sec = nanoseconds / kNanosecondsPerSecond; | 38 // incorrect (can sleep for less than requested). But it's what's available |
46 sleep_time.tv_nsec = nanoseconds % kNanosecondsPerSecond; | 39 // without implementing a busy loop. |
47 int rv = HANDLE_EINTR(nanosleep(&sleep_time, &sleep_time)); | 40 const uint64_t kNanosecondsPerMillisecond = 1000000; |
Mark Mentovai
2014/12/16 23:06:54
1E6? Counting more than four identical characters
scottmg
2014/12/17 01:01:28
Done.
| |
48 DPCHECK(rv == 0) << "nanosleep"; | 41 ::Sleep(static_cast<DWORD>(nanoseconds / kNanosecondsPerMillisecond)); |
Mark Mentovai
2014/12/16 23:06:54
The :: isn’t necessary, unless they’re so strongly
scottmg
2014/12/17 01:01:28
Done.
| |
49 } | 42 } |
50 | 43 |
51 } // namespace crashpad | 44 } // namespace crashpad |
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