1 /* 2 * Copyright 2015 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SkOncePtr.h" 9 #include "SkString.h" 10 #include "SkTime.h" 11 #include "SkTypes.h" 12 13 void SkTime::DateTime::toISO8601(SkString* dst) const { 14 if (dst) { 15 int timeZoneMinutes = SkToInt(fTimeZoneMinutes); 16 char timezoneSign = timeZoneMinutes >= 0 ? '+' : '-'; 17 int timeZoneHours = SkTAbs(timeZoneMinutes) / 60; 18 timeZoneMinutes = SkTAbs(timeZoneMinutes) % 60; 19 dst->printf("%04u-%02u-%02uT%02u:%02u:%02u%c%02d:%02d", 20 static_cast<unsigned>(fYear), static_cast<unsigned>(fMonth), 21 static_cast<unsigned>(fDay), static_cast<unsigned>(fHour), 22 static_cast<unsigned>(fMinute), 23 static_cast<unsigned>(fSecond), timezoneSign, timeZoneHours, 24 timeZoneMinutes); 25 } 26 } 27 28 29 #ifdef SK_BUILD_FOR_WIN32 30 31 #include "Windows.h" 32 void SkTime::GetDateTime(DateTime* dt) { 33 if (dt) { 34 SYSTEMTIME st; 35 GetSystemTime(&st); 36 dt->fTimeZoneMinutes = 0; 37 dt->fYear = st.wYear; 38 dt->fMonth = SkToU8(st.wMonth); 39 dt->fDayOfWeek = SkToU8(st.wDayOfWeek); 40 dt->fDay = SkToU8(st.wDay); 41 dt->fHour = SkToU8(st.wHour); 42 dt->fMinute = SkToU8(st.wMinute); 43 dt->fSecond = SkToU8(st.wSecond); 44 } 45 } 46 47 #else // SK_BUILD_FOR_WIN32 48 49 #include <time.h> 50 void SkTime::GetDateTime(DateTime* dt) { 51 if (dt) { 52 time_t m_time; 53 time(&m_time); 54 struct tm* tstruct; 55 tstruct = gmtime(&m_time); 56 dt->fTimeZoneMinutes = 0; 57 dt->fYear = tstruct->tm_year + 1900; 58 dt->fMonth = SkToU8(tstruct->tm_mon + 1); 59 dt->fDayOfWeek = SkToU8(tstruct->tm_wday); 60 dt->fDay = SkToU8(tstruct->tm_mday); 61 dt->fHour = SkToU8(tstruct->tm_hour); 62 dt->fMinute = SkToU8(tstruct->tm_min); 63 dt->fSecond = SkToU8(tstruct->tm_sec); 64 } 65 } 66 #endif // SK_BUILD_FOR_WIN32 67 68 #if defined(_MSC_VER) 69 // TODO: try std::chrono again with MSVC 2015? 70 #include <intrin.h> 71 SK_DECLARE_STATIC_ONCE_PTR(double, ns_per_tick); 72 double SkTime::GetNSecs() { 73 uint64_t ticks = __rdtsc(); 74 return ticks * *ns_per_tick.get([]{ 75 LARGE_INTEGER khz; // The docs say this returns Hz, but it returns KHz. 76 QueryPerformanceFrequency(&khz); 77 return new double(1e6 / khz.QuadPart); 78 }); 79 } 80 #elif defined(__MACH__) 81 // TODO: fold into std::chrono when available? 82 #include <mach/mach_time.h> 83 SK_DECLARE_STATIC_ONCE_PTR(double, ns_per_tick); 84 double SkTime::GetNSecs() { 85 uint64_t ticks = mach_absolute_time(); 86 return ticks * *ns_per_tick.get([]{ 87 mach_timebase_info_data_t timebase; 88 (void)mach_timebase_info(&timebase); 89 return new double(timebase.numer * 1.0 / timebase.denom); 90 }); 91 } 92 #else 93 // This std::chrono code looks great on Linux and Android, 94 // but MSVC 2013 returned mostly garbage (0ns times, etc). 95 #include <chrono> 96 double SkTime::GetNSecs() { 97 auto now = std::chrono::high_resolution_clock::now(); 98 std::chrono::duration<double, std::nano> ns = now.time_since_epoch(); 99 return ns.count(); 100 } 101 #endif 102
