diff options
Diffstat (limited to 'Modules/timemodule.c')
| -rw-r--r-- | Modules/timemodule.c | 372 |
1 files changed, 97 insertions, 275 deletions
diff --git a/Modules/timemodule.c b/Modules/timemodule.c index d0917a4073..5f6290d98f 100644 --- a/Modules/timemodule.c +++ b/Modules/timemodule.c @@ -27,28 +27,13 @@ #define WIN32_LEAN_AND_MEAN #include <windows.h> #include "pythread.h" - -#if defined(__BORLANDC__) -/* These overrides not needed for Win32 */ -#define timezone _timezone -#define tzname _tzname -#define daylight _daylight -#endif /* __BORLANDC__ */ #endif /* MS_WINDOWS */ #endif /* !__WATCOMC__ || __QNX__ */ -#if defined(__APPLE__) -#include <mach/mach_time.h> -#endif - /* Forward declarations */ -static int floatsleep(double); +static int pysleep(_PyTime_t); static PyObject* floattime(_Py_clock_info_t *info); -#ifdef MS_WINDOWS -static OSVERSIONINFOEX winver; -#endif - static PyObject * time_time(PyObject *self, PyObject *unused) { @@ -92,12 +77,12 @@ floatclock(_Py_clock_info_t *info) } #endif /* HAVE_CLOCK */ -#if defined(MS_WINDOWS) && !defined(__BORLANDC__) +#ifdef MS_WINDOWS #define WIN32_PERF_COUNTER /* Win32 has better clock replacement; we have our own version, due to Mark Hammond and Tim Peters */ -static int -win_perf_counter(_Py_clock_info_t *info, PyObject **result) +static PyObject* +win_perf_counter(_Py_clock_info_t *info) { static LONGLONG cpu_frequency = 0; static LONGLONG ctrStart; @@ -109,10 +94,8 @@ win_perf_counter(_Py_clock_info_t *info, PyObject **result) QueryPerformanceCounter(&now); ctrStart = now.QuadPart; if (!QueryPerformanceFrequency(&freq) || freq.QuadPart == 0) { - /* Unlikely to happen - this works on all intel - machines at least! Revert to clock() */ - *result = NULL; - return -1; + PyErr_SetFromWindowsErr(0); + return NULL; } cpu_frequency = freq.QuadPart; } @@ -124,10 +107,9 @@ win_perf_counter(_Py_clock_info_t *info, PyObject **result) info->monotonic = 1; info->adjustable = 0; } - *result = PyFloat_FromDouble(diff / (double)cpu_frequency); - return 0; + return PyFloat_FromDouble(diff / (double)cpu_frequency); } -#endif +#endif /* MS_WINDOWS */ #if defined(WIN32_PERF_COUNTER) || defined(HAVE_CLOCK) #define PYCLOCK @@ -135,11 +117,10 @@ static PyObject* pyclock(_Py_clock_info_t *info) { #ifdef WIN32_PERF_COUNTER - PyObject *res; - if (win_perf_counter(info, &res) == 0) - return res; -#endif + return win_perf_counter(info); +#else return floatclock(info); +#endif } static PyObject * @@ -169,7 +150,7 @@ time_clock_gettime(PyObject *self, PyObject *args) ret = clock_gettime((clockid_t)clk_id, &tp); if (ret != 0) { - PyErr_SetFromErrno(PyExc_IOError); + PyErr_SetFromErrno(PyExc_OSError); return NULL; } return PyFloat_FromDouble(tp.tv_sec + tp.tv_nsec * 1e-9); @@ -185,22 +166,22 @@ time_clock_settime(PyObject *self, PyObject *args) { int clk_id; PyObject *obj; - time_t tv_sec; - long tv_nsec; + _PyTime_t t; struct timespec tp; int ret; if (!PyArg_ParseTuple(args, "iO:clock_settime", &clk_id, &obj)) return NULL; - if (_PyTime_ObjectToTimespec(obj, &tv_sec, &tv_nsec, _PyTime_ROUND_DOWN) == -1) + if (_PyTime_FromSecondsObject(&t, obj, _PyTime_ROUND_FLOOR) < 0) + return NULL; + + if (_PyTime_AsTimespec(t, &tp) == -1) return NULL; - tp.tv_sec = tv_sec; - tp.tv_nsec = tv_nsec; ret = clock_settime((clockid_t)clk_id, &tp); if (ret != 0) { - PyErr_SetFromErrno(PyExc_IOError); + PyErr_SetFromErrno(PyExc_OSError); return NULL; } Py_RETURN_NONE; @@ -223,7 +204,7 @@ time_clock_getres(PyObject *self, PyObject *args) ret = clock_getres((clockid_t)clk_id, &tp); if (ret != 0) { - PyErr_SetFromErrno(PyExc_IOError); + PyErr_SetFromErrno(PyExc_OSError); return NULL; } @@ -237,17 +218,17 @@ Return the resolution (precision) of the specified clock clk_id."); #endif /* HAVE_CLOCK_GETTIME */ static PyObject * -time_sleep(PyObject *self, PyObject *args) +time_sleep(PyObject *self, PyObject *obj) { - double secs; - if (!PyArg_ParseTuple(args, "d:sleep", &secs)) + _PyTime_t secs; + if (_PyTime_FromSecondsObject(&secs, obj, _PyTime_ROUND_CEILING)) return NULL; if (secs < 0) { PyErr_SetString(PyExc_ValueError, "sleep length must be non-negative"); return NULL; } - if (floatsleep(secs) != 0) + if (pysleep(secs) != 0) return NULL; Py_INCREF(Py_None); return Py_None; @@ -341,7 +322,7 @@ parse_time_t_args(PyObject *args, char *format, time_t *pwhen) whent = time(NULL); } else { - if (_PyTime_ObjectToTime_t(ot, &whent, _PyTime_ROUND_DOWN) == -1) + if (_PyTime_ObjectToTime_t(ot, &whent, _PyTime_ROUND_FLOOR) == -1) return 0; } *pwhen = whent; @@ -903,122 +884,17 @@ the local timezone used by methods such as localtime, but this behaviour\n\ should not be relied on."); #endif /* HAVE_WORKING_TZSET */ -#if defined(MS_WINDOWS) || defined(__APPLE__) \ - || (defined(HAVE_CLOCK_GETTIME) \ - && (defined(CLOCK_HIGHRES) || defined(CLOCK_MONOTONIC))) -#define PYMONOTONIC -#endif - -#ifdef PYMONOTONIC -static PyObject* +static PyObject * pymonotonic(_Py_clock_info_t *info) { -#if defined(MS_WINDOWS) - static ULONGLONG (*GetTickCount64) (void) = NULL; - static ULONGLONG (CALLBACK *Py_GetTickCount64)(void); - static int has_getickcount64 = -1; - double result; - - if (has_getickcount64 == -1) { - /* GetTickCount64() was added to Windows Vista */ - if (winver.dwMajorVersion >= 6) { - HINSTANCE hKernel32; - hKernel32 = GetModuleHandleW(L"KERNEL32"); - *(FARPROC*)&Py_GetTickCount64 = GetProcAddress(hKernel32, - "GetTickCount64"); - has_getickcount64 = (Py_GetTickCount64 != NULL); - } - else - has_getickcount64 = 0; - } - - if (has_getickcount64) { - ULONGLONG ticks; - ticks = Py_GetTickCount64(); - result = (double)ticks * 1e-3; - } - else { - static DWORD last_ticks = 0; - static DWORD n_overflow = 0; - DWORD ticks; - - ticks = GetTickCount(); - if (ticks < last_ticks) - n_overflow++; - last_ticks = ticks; - - result = ldexp(n_overflow, 32); - result += ticks; - result *= 1e-3; - } - - if (info) { - DWORD timeAdjustment, timeIncrement; - BOOL isTimeAdjustmentDisabled, ok; - if (has_getickcount64) - info->implementation = "GetTickCount64()"; - else - info->implementation = "GetTickCount()"; - info->monotonic = 1; - ok = GetSystemTimeAdjustment(&timeAdjustment, &timeIncrement, - &isTimeAdjustmentDisabled); - if (!ok) { - PyErr_SetFromWindowsErr(0); - return NULL; - } - info->resolution = timeIncrement * 1e-7; - info->adjustable = 0; - } - return PyFloat_FromDouble(result); - -#elif defined(__APPLE__) - static mach_timebase_info_data_t timebase; - uint64_t time; - double secs; - - if (timebase.denom == 0) { - /* According to the Technical Q&A QA1398, mach_timebase_info() cannot - fail: https://developer.apple.com/library/mac/#qa/qa1398/ */ - (void)mach_timebase_info(&timebase); - } - - time = mach_absolute_time(); - secs = (double)time * timebase.numer / timebase.denom * 1e-9; - if (info) { - info->implementation = "mach_absolute_time()"; - info->resolution = (double)timebase.numer / timebase.denom * 1e-9; - info->monotonic = 1; - info->adjustable = 0; - } - return PyFloat_FromDouble(secs); - -#elif defined(HAVE_CLOCK_GETTIME) && (defined(CLOCK_HIGHRES) || defined(CLOCK_MONOTONIC)) - struct timespec tp; -#ifdef CLOCK_HIGHRES - const clockid_t clk_id = CLOCK_HIGHRES; - const char *function = "clock_gettime(CLOCK_HIGHRES)"; -#else - const clockid_t clk_id = CLOCK_MONOTONIC; - const char *function = "clock_gettime(CLOCK_MONOTONIC)"; -#endif - - if (clock_gettime(clk_id, &tp) != 0) { - PyErr_SetFromErrno(PyExc_OSError); + _PyTime_t t; + double d; + if (_PyTime_GetMonotonicClockWithInfo(&t, info) < 0) { + assert(info != NULL); return NULL; } - - if (info) { - struct timespec res; - info->monotonic = 1; - info->implementation = function; - info->adjustable = 0; - if (clock_getres(clk_id, &res) == 0) - info->resolution = res.tv_sec + res.tv_nsec * 1e-9; - else - info->resolution = 1e-9; - } - return PyFloat_FromDouble(tp.tv_sec + tp.tv_nsec * 1e-9); -#endif + d = _PyTime_AsSecondsDouble(t); + return PyFloat_FromDouble(d); } static PyObject * @@ -1031,40 +907,15 @@ PyDoc_STRVAR(monotonic_doc, "monotonic() -> float\n\ \n\ Monotonic clock, cannot go backward."); -#endif /* PYMONOTONIC */ static PyObject* perf_counter(_Py_clock_info_t *info) { -#if defined(WIN32_PERF_COUNTER) || defined(PYMONOTONIC) - PyObject *res; -#endif -#if defined(WIN32_PERF_COUNTER) - static int use_perf_counter = 1; -#endif -#ifdef PYMONOTONIC - static int use_monotonic = 1; -#endif - #ifdef WIN32_PERF_COUNTER - if (use_perf_counter) { - if (win_perf_counter(info, &res) == 0) - return res; - use_perf_counter = 0; - } -#endif - -#ifdef PYMONOTONIC - if (use_monotonic) { - res = pymonotonic(info); - if (res != NULL) - return res; - use_monotonic = 0; - PyErr_Clear(); - } + return win_perf_counter(info); +#else + return pymonotonic(info); #endif - - return floattime(info); } static PyObject * @@ -1231,10 +1082,8 @@ time_get_clock_info(PyObject *self, PyObject *args) else if (strcmp(name, "clock") == 0) obj = pyclock(&info); #endif -#ifdef PYMONOTONIC else if (strcmp(name, "monotonic") == 0) obj = pymonotonic(&info); -#endif else if (strcmp(name, "perf_counter") == 0) obj = perf_counter(&info); else if (strcmp(name, "process_time") == 0) @@ -1411,7 +1260,7 @@ static PyMethodDef time_methods[] = { {"clock_settime", time_clock_settime, METH_VARARGS, clock_settime_doc}, {"clock_getres", time_clock_getres, METH_VARARGS, clock_getres_doc}, #endif - {"sleep", time_sleep, METH_VARARGS, sleep_doc}, + {"sleep", time_sleep, METH_O, sleep_doc}, {"gmtime", time_gmtime, METH_VARARGS, gmtime_doc}, {"localtime", time_localtime, METH_VARARGS, localtime_doc}, {"asctime", time_asctime, METH_VARARGS, asctime_doc}, @@ -1426,9 +1275,7 @@ static PyMethodDef time_methods[] = { #ifdef HAVE_WORKING_TZSET {"tzset", time_tzset, METH_NOARGS, tzset_doc}, #endif -#ifdef PYMONOTONIC {"monotonic", time_monotonic, METH_NOARGS, monotonic_doc}, -#endif {"process_time", time_process_time, METH_NOARGS, process_time_doc}, {"perf_counter", time_perf_counter, METH_NOARGS, perf_counter_doc}, {"get_clock_info", time_get_clock_info, METH_VARARGS, get_clock_info_doc}, @@ -1510,15 +1357,6 @@ PyInit_time(void) if (PyStructSequence_InitType2(&StructTimeType, &struct_time_type_desc) < 0) return NULL; - -#ifdef MS_WINDOWS - winver.dwOSVersionInfoSize = sizeof(winver); - if (!GetVersionEx((OSVERSIONINFO*)&winver)) { - Py_DECREF(m); - PyErr_SetFromWindowsErr(0); - return NULL; - } -#endif } Py_INCREF(&StructTimeType); #ifdef HAVE_STRUCT_TM_TM_ZONE @@ -1534,109 +1372,93 @@ PyInit_time(void) static PyObject* floattime(_Py_clock_info_t *info) { - _PyTime_timeval t; -#ifdef HAVE_CLOCK_GETTIME - struct timespec tp; - int ret; - - /* _PyTime_gettimeofday() does not use clock_gettime() - because it would require to link Python to the rt (real-time) - library, at least on Linux */ - ret = clock_gettime(CLOCK_REALTIME, &tp); - if (ret == 0) { - if (info) { - struct timespec res; - info->implementation = "clock_gettime(CLOCK_REALTIME)"; - info->monotonic = 0; - info->adjustable = 1; - if (clock_getres(CLOCK_REALTIME, &res) == 0) - info->resolution = res.tv_sec + res.tv_nsec * 1e-9; - else - info->resolution = 1e-9; - } - return PyFloat_FromDouble(tp.tv_sec + tp.tv_nsec * 1e-9); + _PyTime_t t; + double d; + if (_PyTime_GetSystemClockWithInfo(&t, info) < 0) { + assert(info != NULL); + return NULL; } -#endif - _PyTime_gettimeofday_info(&t, info); - return PyFloat_FromDouble((double)t.tv_sec + t.tv_usec * 1e-6); + d = _PyTime_AsSecondsDouble(t); + return PyFloat_FromDouble(d); } -/* Implement floatsleep() for various platforms. +/* Implement pysleep() for various platforms. When interrupted (or when another error occurs), return -1 and set an exception; else return 0. */ static int -floatsleep(double secs) +pysleep(_PyTime_t secs) { -/* XXX Should test for MS_WINDOWS first! */ -#if defined(HAVE_SELECT) && !defined(__EMX__) - struct timeval t; - double frac; - int err; - - frac = fmod(secs, 1.0); - secs = floor(secs); - t.tv_sec = (long)secs; - t.tv_usec = (long)(frac*1000000.0); - Py_BEGIN_ALLOW_THREADS - err = select(0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &t); - Py_END_ALLOW_THREADS - if (err != 0) { -#ifdef EINTR - if (errno == EINTR) { - if (PyErr_CheckSignals()) - return -1; - } - else + _PyTime_t deadline, monotonic; +#ifndef MS_WINDOWS + struct timeval timeout; + int err = 0; +#else + _PyTime_t millisecs; + unsigned long ul_millis; + DWORD rc; + HANDLE hInterruptEvent; #endif - { - PyErr_SetFromErrno(PyExc_IOError); + + deadline = _PyTime_GetMonotonicClock() + secs; + + do { +#ifndef MS_WINDOWS + if (_PyTime_AsTimeval(secs, &timeout, _PyTime_ROUND_CEILING) < 0) return -1; - } - } -#elif defined(__WATCOMC__) && !defined(__QNX__) - /* XXX Can't interrupt this sleep */ - Py_BEGIN_ALLOW_THREADS - delay((int)(secs * 1000 + 0.5)); /* delay() uses milliseconds */ - Py_END_ALLOW_THREADS -#elif defined(MS_WINDOWS) - { - double millisecs = secs * 1000.0; - unsigned long ul_millis; + Py_BEGIN_ALLOW_THREADS + err = select(0, (fd_set *)0, (fd_set *)0, (fd_set *)0, &timeout); + Py_END_ALLOW_THREADS + + if (err == 0) + break; + + if (errno != EINTR) { + PyErr_SetFromErrno(PyExc_OSError); + return -1; + } +#else + millisecs = _PyTime_AsMilliseconds(secs, _PyTime_ROUND_CEILING); if (millisecs > (double)ULONG_MAX) { PyErr_SetString(PyExc_OverflowError, "sleep length is too large"); return -1; } - Py_BEGIN_ALLOW_THREADS + /* Allow sleep(0) to maintain win32 semantics, and as decreed * by Guido, only the main thread can be interrupted. */ ul_millis = (unsigned long)millisecs; - if (ul_millis == 0 || !_PyOS_IsMainThread()) + if (ul_millis == 0 || !_PyOS_IsMainThread()) { + Py_BEGIN_ALLOW_THREADS Sleep(ul_millis); - else { - DWORD rc; - HANDLE hInterruptEvent = _PyOS_SigintEvent(); - ResetEvent(hInterruptEvent); - rc = WaitForSingleObjectEx(hInterruptEvent, ul_millis, FALSE); - if (rc == WAIT_OBJECT_0) { - Py_BLOCK_THREADS - errno = EINTR; - PyErr_SetFromErrno(PyExc_IOError); - return -1; - } + Py_END_ALLOW_THREADS + break; } + + hInterruptEvent = _PyOS_SigintEvent(); + ResetEvent(hInterruptEvent); + + Py_BEGIN_ALLOW_THREADS + rc = WaitForSingleObjectEx(hInterruptEvent, ul_millis, FALSE); Py_END_ALLOW_THREADS - } -#else - /* XXX Can't interrupt this sleep */ - Py_BEGIN_ALLOW_THREADS - sleep((int)secs); - Py_END_ALLOW_THREADS + + if (rc != WAIT_OBJECT_0) + break; #endif + /* sleep was interrupted by SIGINT */ + if (PyErr_CheckSignals()) + return -1; + + monotonic = _PyTime_GetMonotonicClock(); + secs = deadline - monotonic; + if (secs < 0) + break; + /* retry with the recomputed delay */ + } while (1); + return 0; } |