Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 1 | #include "Python.h" |
Victor Stinner | 09225b7 | 2012-02-07 23:41:01 +0100 | [diff] [blame] | 2 | #ifdef MS_WINDOWS |
| 3 | #include <windows.h> |
| 4 | #endif |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 5 | |
Victor Stinner | 09225b7 | 2012-02-07 23:41:01 +0100 | [diff] [blame] | 6 | #if defined(__APPLE__) && defined(HAVE_GETTIMEOFDAY) && defined(HAVE_FTIME) |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 7 | /* |
| 8 | * _PyTime_gettimeofday falls back to ftime when getttimeofday fails because the latter |
| 9 | * might fail on some platforms. This fallback is unwanted on MacOSX because |
| 10 | * that makes it impossible to use a binary build on OSX 10.4 on earlier |
| 11 | * releases of the OS. Therefore claim we don't support ftime. |
| 12 | */ |
| 13 | # undef HAVE_FTIME |
| 14 | #endif |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 15 | |
Victor Stinner | 09225b7 | 2012-02-07 23:41:01 +0100 | [diff] [blame] | 16 | #if defined(HAVE_FTIME) && !defined(MS_WINDOWS) |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 17 | #include <sys/timeb.h> |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 18 | extern int ftime(struct timeb *); |
Victor Stinner | 09225b7 | 2012-02-07 23:41:01 +0100 | [diff] [blame] | 19 | #endif |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 20 | |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 21 | static void |
| 22 | pygettimeofday(_PyTime_timeval *tp, _Py_clock_info_t *info) |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 23 | { |
Victor Stinner | 09225b7 | 2012-02-07 23:41:01 +0100 | [diff] [blame] | 24 | #ifdef MS_WINDOWS |
| 25 | FILETIME system_time; |
| 26 | ULARGE_INTEGER large; |
Victor Stinner | 4195b5c | 2012-02-08 23:03:19 +0100 | [diff] [blame] | 27 | ULONGLONG microseconds; |
Victor Stinner | 09225b7 | 2012-02-07 23:41:01 +0100 | [diff] [blame] | 28 | |
| 29 | GetSystemTimeAsFileTime(&system_time); |
| 30 | large.u.LowPart = system_time.dwLowDateTime; |
| 31 | large.u.HighPart = system_time.dwHighDateTime; |
Victor Stinner | 4195b5c | 2012-02-08 23:03:19 +0100 | [diff] [blame] | 32 | /* 11,644,473,600,000,000: number of microseconds between |
Victor Stinner | 09225b7 | 2012-02-07 23:41:01 +0100 | [diff] [blame] | 33 | the 1st january 1601 and the 1st january 1970 (369 years + 89 leap |
| 34 | days). */ |
Victor Stinner | 4195b5c | 2012-02-08 23:03:19 +0100 | [diff] [blame] | 35 | microseconds = large.QuadPart / 10 - 11644473600000000; |
| 36 | tp->tv_sec = microseconds / 1000000; |
| 37 | tp->tv_usec = microseconds % 1000000; |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 38 | if (info) { |
| 39 | DWORD timeAdjustment, timeIncrement; |
| 40 | BOOL isTimeAdjustmentDisabled; |
| 41 | |
| 42 | info->implementation = "GetSystemTimeAsFileTime()"; |
Benjamin Peterson | 49a69e4 | 2012-05-01 09:38:34 -0400 | [diff] [blame] | 43 | info->monotonic = 0; |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 44 | (void) GetSystemTimeAdjustment(&timeAdjustment, &timeIncrement, |
| 45 | &isTimeAdjustmentDisabled); |
| 46 | info->resolution = timeIncrement * 1e-7; |
| 47 | if (isTimeAdjustmentDisabled) |
Benjamin Peterson | 49a69e4 | 2012-05-01 09:38:34 -0400 | [diff] [blame] | 48 | info->adjusted = 0; |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 49 | else |
Benjamin Peterson | 49a69e4 | 2012-05-01 09:38:34 -0400 | [diff] [blame] | 50 | info->adjusted = 1; |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 51 | } |
Victor Stinner | 09225b7 | 2012-02-07 23:41:01 +0100 | [diff] [blame] | 52 | #else |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 53 | /* There are three ways to get the time: |
| 54 | (1) gettimeofday() -- resolution in microseconds |
| 55 | (2) ftime() -- resolution in milliseconds |
| 56 | (3) time() -- resolution in seconds |
| 57 | In all cases the return value in a timeval struct. |
| 58 | Since on some systems (e.g. SCO ODT 3.0) gettimeofday() may |
| 59 | fail, so we fall back on ftime() or time(). |
| 60 | Note: clock resolution does not imply clock accuracy! */ |
Victor Stinner | 09225b7 | 2012-02-07 23:41:01 +0100 | [diff] [blame] | 61 | |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 62 | #ifdef HAVE_GETTIMEOFDAY |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 63 | int err; |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 64 | #ifdef GETTIMEOFDAY_NO_TZ |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 65 | err = gettimeofday(tp); |
| 66 | #else |
| 67 | err = gettimeofday(tp, (struct timezone *)NULL); |
| 68 | #endif |
| 69 | if (err == 0) { |
| 70 | if (info) { |
| 71 | info->implementation = "gettimeofday()"; |
| 72 | info->resolution = 1e-6; |
Benjamin Peterson | 49a69e4 | 2012-05-01 09:38:34 -0400 | [diff] [blame] | 73 | info->monotonic = 0; |
| 74 | info->adjusted = 1; |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 75 | } |
Victor Stinner | ccd5715 | 2012-02-08 14:31:50 +0100 | [diff] [blame] | 76 | return; |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 77 | } |
| 78 | #endif /* HAVE_GETTIMEOFDAY */ |
Victor Stinner | 09225b7 | 2012-02-07 23:41:01 +0100 | [diff] [blame] | 79 | |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 80 | #if defined(HAVE_FTIME) |
Victor Stinner | 4195b5c | 2012-02-08 23:03:19 +0100 | [diff] [blame] | 81 | { |
| 82 | struct timeb t; |
| 83 | ftime(&t); |
| 84 | tp->tv_sec = t.time; |
| 85 | tp->tv_usec = t.millitm * 1000; |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 86 | if (info) { |
| 87 | info->implementation = "ftime()"; |
| 88 | info->resolution = 1e-3; |
Benjamin Peterson | 49a69e4 | 2012-05-01 09:38:34 -0400 | [diff] [blame] | 89 | info->monotonic = 0; |
| 90 | info->adjusted = 1; |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 91 | } |
Victor Stinner | 4195b5c | 2012-02-08 23:03:19 +0100 | [diff] [blame] | 92 | } |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 93 | #else /* !HAVE_FTIME */ |
Victor Stinner | 4195b5c | 2012-02-08 23:03:19 +0100 | [diff] [blame] | 94 | tp->tv_sec = time(NULL); |
| 95 | tp->tv_usec = 0; |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 96 | if (info) { |
| 97 | info->implementation = "time()"; |
| 98 | info->resolution = 1.0; |
Benjamin Peterson | 49a69e4 | 2012-05-01 09:38:34 -0400 | [diff] [blame] | 99 | info->monotonic = 0; |
| 100 | info->adjusted = 1; |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 101 | } |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 102 | #endif /* !HAVE_FTIME */ |
Victor Stinner | 09225b7 | 2012-02-07 23:41:01 +0100 | [diff] [blame] | 103 | |
| 104 | #endif /* MS_WINDOWS */ |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 105 | } |
| 106 | |
Victor Stinner | ec89539 | 2012-04-29 02:41:27 +0200 | [diff] [blame] | 107 | void |
| 108 | _PyTime_gettimeofday(_PyTime_timeval *tp) |
| 109 | { |
| 110 | pygettimeofday(tp, NULL); |
| 111 | } |
| 112 | |
| 113 | void |
| 114 | _PyTime_gettimeofday_info(_PyTime_timeval *tp, _Py_clock_info_t *info) |
| 115 | { |
| 116 | pygettimeofday(tp, info); |
| 117 | } |
| 118 | |
Victor Stinner | 5d272cc | 2012-03-13 13:35:55 +0100 | [diff] [blame] | 119 | static void |
| 120 | error_time_t_overflow(void) |
Victor Stinner | 643cd68 | 2012-03-02 22:54:03 +0100 | [diff] [blame] | 121 | { |
Victor Stinner | 5d272cc | 2012-03-13 13:35:55 +0100 | [diff] [blame] | 122 | PyErr_SetString(PyExc_OverflowError, |
| 123 | "timestamp out of range for platform time_t"); |
| 124 | } |
| 125 | |
Larry Hastings | 76ad59b | 2012-05-03 00:30:07 -0700 | [diff] [blame] | 126 | time_t |
Victor Stinner | 5d272cc | 2012-03-13 13:35:55 +0100 | [diff] [blame] | 127 | _PyLong_AsTime_t(PyObject *obj) |
| 128 | { |
| 129 | #if defined(HAVE_LONG_LONG) && SIZEOF_TIME_T == SIZEOF_LONG_LONG |
| 130 | PY_LONG_LONG val; |
| 131 | val = PyLong_AsLongLong(obj); |
| 132 | #else |
| 133 | long val; |
| 134 | assert(sizeof(time_t) <= sizeof(long)); |
| 135 | val = PyLong_AsLong(obj); |
| 136 | #endif |
| 137 | if (val == -1 && PyErr_Occurred()) { |
| 138 | if (PyErr_ExceptionMatches(PyExc_OverflowError)) |
| 139 | error_time_t_overflow(); |
| 140 | return -1; |
| 141 | } |
| 142 | return (time_t)val; |
| 143 | } |
| 144 | |
Larry Hastings | 6fe20b3 | 2012-04-19 15:07:49 -0700 | [diff] [blame] | 145 | PyObject * |
| 146 | _PyLong_FromTime_t(time_t t) |
| 147 | { |
| 148 | #if defined(HAVE_LONG_LONG) && SIZEOF_TIME_T == SIZEOF_LONG_LONG |
| 149 | return PyLong_FromLongLong((PY_LONG_LONG)t); |
| 150 | #else |
| 151 | assert(sizeof(time_t) <= sizeof(long)); |
| 152 | return PyLong_FromLong((long)t); |
| 153 | #endif |
| 154 | } |
| 155 | |
Victor Stinner | 5d272cc | 2012-03-13 13:35:55 +0100 | [diff] [blame] | 156 | static int |
| 157 | _PyTime_ObjectToDenominator(PyObject *obj, time_t *sec, long *numerator, |
| 158 | double denominator) |
| 159 | { |
| 160 | assert(denominator <= LONG_MAX); |
Victor Stinner | 643cd68 | 2012-03-02 22:54:03 +0100 | [diff] [blame] | 161 | if (PyFloat_Check(obj)) { |
Victor Stinner | bd273c1 | 2012-03-13 19:12:23 +0100 | [diff] [blame] | 162 | double d, intpart, err; |
| 163 | /* volatile avoids unsafe optimization on float enabled by gcc -O3 */ |
| 164 | volatile double floatpart; |
Victor Stinner | 643cd68 | 2012-03-02 22:54:03 +0100 | [diff] [blame] | 165 | |
| 166 | d = PyFloat_AsDouble(obj); |
| 167 | floatpart = modf(d, &intpart); |
| 168 | if (floatpart < 0) { |
| 169 | floatpart = 1.0 + floatpart; |
| 170 | intpart -= 1.0; |
| 171 | } |
| 172 | |
| 173 | *sec = (time_t)intpart; |
| 174 | err = intpart - (double)*sec; |
Victor Stinner | 5d272cc | 2012-03-13 13:35:55 +0100 | [diff] [blame] | 175 | if (err <= -1.0 || err >= 1.0) { |
| 176 | error_time_t_overflow(); |
| 177 | return -1; |
| 178 | } |
Victor Stinner | 643cd68 | 2012-03-02 22:54:03 +0100 | [diff] [blame] | 179 | |
Victor Stinner | 5d272cc | 2012-03-13 13:35:55 +0100 | [diff] [blame] | 180 | floatpart *= denominator; |
| 181 | *numerator = (long)floatpart; |
Victor Stinner | 643cd68 | 2012-03-02 22:54:03 +0100 | [diff] [blame] | 182 | return 0; |
| 183 | } |
| 184 | else { |
Victor Stinner | 5d272cc | 2012-03-13 13:35:55 +0100 | [diff] [blame] | 185 | *sec = _PyLong_AsTime_t(obj); |
| 186 | if (*sec == (time_t)-1 && PyErr_Occurred()) |
| 187 | return -1; |
| 188 | *numerator = 0; |
Victor Stinner | 643cd68 | 2012-03-02 22:54:03 +0100 | [diff] [blame] | 189 | return 0; |
| 190 | } |
Victor Stinner | 5d272cc | 2012-03-13 13:35:55 +0100 | [diff] [blame] | 191 | } |
Victor Stinner | 643cd68 | 2012-03-02 22:54:03 +0100 | [diff] [blame] | 192 | |
Victor Stinner | 5d272cc | 2012-03-13 13:35:55 +0100 | [diff] [blame] | 193 | int |
| 194 | _PyTime_ObjectToTime_t(PyObject *obj, time_t *sec) |
| 195 | { |
| 196 | if (PyFloat_Check(obj)) { |
| 197 | double d, intpart, err; |
| 198 | |
Victor Stinner | 5d272cc | 2012-03-13 13:35:55 +0100 | [diff] [blame] | 199 | d = PyFloat_AsDouble(obj); |
| 200 | (void)modf(d, &intpart); |
| 201 | |
| 202 | *sec = (time_t)intpart; |
| 203 | err = intpart - (double)*sec; |
| 204 | if (err <= -1.0 || err >= 1.0) { |
| 205 | error_time_t_overflow(); |
| 206 | return -1; |
| 207 | } |
| 208 | return 0; |
| 209 | } |
| 210 | else { |
| 211 | *sec = _PyLong_AsTime_t(obj); |
| 212 | if (*sec == (time_t)-1 && PyErr_Occurred()) |
| 213 | return -1; |
| 214 | return 0; |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | int |
| 219 | _PyTime_ObjectToTimespec(PyObject *obj, time_t *sec, long *nsec) |
| 220 | { |
| 221 | return _PyTime_ObjectToDenominator(obj, sec, nsec, 1e9); |
| 222 | } |
| 223 | |
| 224 | int |
| 225 | _PyTime_ObjectToTimeval(PyObject *obj, time_t *sec, long *usec) |
| 226 | { |
| 227 | return _PyTime_ObjectToDenominator(obj, sec, usec, 1e6); |
Victor Stinner | 643cd68 | 2012-03-02 22:54:03 +0100 | [diff] [blame] | 228 | } |
| 229 | |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 230 | void |
Alexander Belopolsky | 6fc4ade | 2010-08-05 17:34:27 +0000 | [diff] [blame] | 231 | _PyTime_Init() |
| 232 | { |
| 233 | /* Do nothing. Needed to force linking. */ |
| 234 | } |