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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_time.h> | 10 #include <mach/mach_time.h> |
10 #include <sys/sysctl.h> | 11 #include <sys/sysctl.h> |
11 #include <sys/time.h> | 12 #include <sys/time.h> |
12 #include <sys/types.h> | 13 #include <sys/types.h> |
13 #include <time.h> | 14 #include <time.h> |
14 | 15 |
15 #include "base/basictypes.h" | 16 #include "base/basictypes.h" |
16 #include "base/logging.h" | 17 #include "base/logging.h" |
17 #include "base/mac/scoped_cftyperef.h" | 18 #include "base/mac/scoped_cftyperef.h" |
| 19 #include "base/mac/scoped_mach_port.h" |
18 | 20 |
19 namespace { | 21 namespace { |
20 | 22 |
21 uint64_t ComputeCurrentTicks() { | 23 uint64_t ComputeCurrentTicks() { |
22 #if defined(OS_IOS) | 24 #if defined(OS_IOS) |
23 // On iOS mach_absolute_time stops while the device is sleeping. Instead use | 25 // On iOS mach_absolute_time stops while the device is sleeping. Instead use |
24 // now - KERN_BOOTTIME to get a time difference that is not impacted by clock | 26 // now - KERN_BOOTTIME to get a time difference that is not impacted by clock |
25 // changes. KERN_BOOTTIME will be updated by the system whenever the system | 27 // changes. KERN_BOOTTIME will be updated by the system whenever the system |
26 // clock change. | 28 // clock change. |
27 struct timeval boottime; | 29 struct timeval boottime; |
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57 mach_absolute_time() / base::Time::kNanosecondsPerMicrosecond * | 59 mach_absolute_time() / base::Time::kNanosecondsPerMicrosecond * |
58 timebase_info.numer / timebase_info.denom; | 60 timebase_info.numer / timebase_info.denom; |
59 | 61 |
60 // Don't bother with the rollover handling that the Windows version does. | 62 // Don't bother with the rollover handling that the Windows version does. |
61 // With numer and denom = 1 (the expected case), the 64-bit absolute time | 63 // With numer and denom = 1 (the expected case), the 64-bit absolute time |
62 // reported in nanoseconds is enough to last nearly 585 years. | 64 // reported in nanoseconds is enough to last nearly 585 years. |
63 return absolute_micro; | 65 return absolute_micro; |
64 #endif // defined(OS_IOS) | 66 #endif // defined(OS_IOS) |
65 } | 67 } |
66 | 68 |
| 69 uint64_t ComputeThreadTicks() { |
| 70 #if defined(OS_IOS) |
| 71 NOTREACHED(); |
| 72 return 0; |
| 73 #else |
| 74 base::mac::ScopedMachPort thread(mach_thread_self()); |
| 75 mach_msg_type_number_t thread_info_count = THREAD_BASIC_INFO_COUNT; |
| 76 thread_basic_info_data_t thread_info_data; |
| 77 |
| 78 if (thread == MACH_PORT_NULL) { |
| 79 DLOG(ERROR) << "Failed to get mach_thread_self()"; |
| 80 return 0; |
| 81 } |
| 82 |
| 83 kern_return_t kr = thread_info( |
| 84 thread, |
| 85 THREAD_BASIC_INFO, |
| 86 reinterpret_cast<thread_info_t>(&thread_info_data), |
| 87 &thread_info_count); |
| 88 DCHECK_EQ(KERN_SUCCESS, kr); |
| 89 |
| 90 return (thread_info_data.user_time.seconds * |
| 91 base::Time::kMicrosecondsPerSecond) + |
| 92 thread_info_data.user_time.microseconds; |
| 93 #endif // defined(OS_IOS) |
| 94 } |
| 95 |
67 } // namespace | 96 } // namespace |
68 | 97 |
69 namespace base { | 98 namespace base { |
70 | 99 |
71 // The Time routines in this file use Mach and CoreFoundation APIs, since the | 100 // The Time routines in this file use Mach and CoreFoundation APIs, since the |
72 // POSIX definition of time_t in Mac OS X wraps around after 2038--and | 101 // POSIX definition of time_t in Mac OS X wraps around after 2038--and |
73 // there are already cookie expiration dates, etc., past that time out in | 102 // there are already cookie expiration dates, etc., past that time out in |
74 // the field. Using CFDate prevents that problem, and using mach_absolute_time | 103 // the field. Using CFDate prevents that problem, and using mach_absolute_time |
75 // for TimeTicks gives us nice high-resolution interval timing. | 104 // for TimeTicks gives us nice high-resolution interval timing. |
76 | 105 |
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189 return Now(); | 218 return Now(); |
190 } | 219 } |
191 | 220 |
192 // static | 221 // static |
193 bool TimeTicks::IsHighResNowFastAndReliable() { | 222 bool TimeTicks::IsHighResNowFastAndReliable() { |
194 return true; | 223 return true; |
195 } | 224 } |
196 | 225 |
197 // static | 226 // static |
198 TimeTicks TimeTicks::ThreadNow() { | 227 TimeTicks TimeTicks::ThreadNow() { |
199 NOTREACHED(); | 228 return TimeTicks(ComputeThreadTicks()); |
200 return TimeTicks(); | |
201 } | 229 } |
202 | 230 |
203 // static | 231 // static |
204 TimeTicks TimeTicks::NowFromSystemTraceTime() { | 232 TimeTicks TimeTicks::NowFromSystemTraceTime() { |
205 return HighResNow(); | 233 return HighResNow(); |
206 } | 234 } |
207 | 235 |
208 } // namespace base | 236 } // namespace base |
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