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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/time/time.h" | 5 #include "base/time/time.h" |
6 | 6 |
7 #include <CoreFoundation/CFDate.h> | 7 #include <CoreFoundation/CFDate.h> |
8 #include <CoreFoundation/CFTimeZone.h> | 8 #include <CoreFoundation/CFTimeZone.h> |
9 #include <mach/mach.h> | 9 #include <mach/mach.h> |
10 #include <mach/mach_time.h> | 10 #include <mach/mach_time.h> |
11 #include <stddef.h> | 11 #include <stddef.h> |
12 #include <stdint.h> | 12 #include <stdint.h> |
13 #include <sys/sysctl.h> | 13 #include <sys/sysctl.h> |
14 #include <sys/time.h> | 14 #include <sys/time.h> |
15 #include <sys/types.h> | 15 #include <sys/types.h> |
16 #include <time.h> | 16 #include <time.h> |
17 | 17 |
18 #include "base/logging.h" | 18 #include "base/logging.h" |
19 #include "base/mac/mach_logging.h" | 19 #include "base/mac/mach_logging.h" |
20 #include "base/mac/scoped_cftyperef.h" | 20 #include "base/mac/scoped_cftyperef.h" |
21 #include "base/mac/scoped_mach_port.h" | 21 #include "base/mac/scoped_mach_port.h" |
22 #include "base/macros.h" | 22 #include "base/macros.h" |
23 #include "base/numerics/safe_conversions.h" | 23 #include "base/numerics/safe_conversions.h" |
24 #include "build/build_config.h" | 24 #include "build/build_config.h" |
25 | 25 |
26 namespace { | 26 namespace { |
27 | 27 |
| 28 #if defined(OS_IOS) |
| 29 const char* kIOSKernBoottimeClockId = |
| 30 "IOS_CF_ABSOLUTE_TIME_MINUS_KERN_BOOTTIME_MICROS"; |
| 31 #else |
| 32 const char* kMacMachClockId = "MAC_MACH_ABSOLUTE_TIME_MICROS"; |
| 33 #endif // defined(OS_IOS) |
| 34 |
28 int64_t ComputeCurrentTicks() { | 35 int64_t ComputeCurrentTicks() { |
29 #if defined(OS_IOS) | 36 #if defined(OS_IOS) |
30 // On iOS mach_absolute_time stops while the device is sleeping. Instead use | 37 // On iOS mach_absolute_time stops while the device is sleeping. Instead use |
31 // now - KERN_BOOTTIME to get a time difference that is not impacted by clock | 38 // now - KERN_BOOTTIME to get a time difference that is not impacted by clock |
32 // changes. KERN_BOOTTIME will be updated by the system whenever the system | 39 // changes. KERN_BOOTTIME will be updated by the system whenever the system |
33 // clock change. | 40 // clock change. |
34 struct timeval boottime; | 41 struct timeval boottime; |
35 int mib[2] = {CTL_KERN, KERN_BOOTTIME}; | 42 int mib[2] = {CTL_KERN, KERN_BOOTTIME}; |
36 size_t size = sizeof(boottime); | 43 size_t size = sizeof(boottime); |
37 int kr = sysctl(mib, arraysize(mib), &boottime, &size, NULL, 0); | 44 int kr = sysctl(mib, arraysize(mib), &boottime, &size, NULL, 0); |
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230 TimeTicks TimeTicks::Now() { | 237 TimeTicks TimeTicks::Now() { |
231 return TimeTicks(ComputeCurrentTicks()); | 238 return TimeTicks(ComputeCurrentTicks()); |
232 } | 239 } |
233 | 240 |
234 // static | 241 // static |
235 bool TimeTicks::IsHighResolution() { | 242 bool TimeTicks::IsHighResolution() { |
236 return true; | 243 return true; |
237 } | 244 } |
238 | 245 |
239 // static | 246 // static |
| 247 std::string TimeTicks::ClockId() { |
| 248 #if defined(OS_IOS) |
| 249 return kIOSKernBoottimeClockId; |
| 250 #else |
| 251 return kMacMachClockId; |
| 252 #endif // defined(OS_IOS) |
| 253 } |
| 254 |
| 255 // static |
240 ThreadTicks ThreadTicks::Now() { | 256 ThreadTicks ThreadTicks::Now() { |
241 return ThreadTicks(ComputeThreadTicks()); | 257 return ThreadTicks(ComputeThreadTicks()); |
242 } | 258 } |
243 | 259 |
244 } // namespace base | 260 } // namespace base |
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