diff options
Diffstat (limited to 'unix/tclUnixTime.c')
| -rw-r--r-- | unix/tclUnixTime.c | 237 |
1 files changed, 96 insertions, 141 deletions
diff --git a/unix/tclUnixTime.c b/unix/tclUnixTime.c index 12ba965..6a73ac2 100644 --- a/unix/tclUnixTime.c +++ b/unix/tclUnixTime.c @@ -8,14 +8,13 @@ * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclUnixTime.c,v 1.26 2005/11/02 23:26:50 dkf Exp $ */ #include "tclInt.h" #include <locale.h> -#define TM_YEAR_BASE 1900 -#define IsLeapYear(x) (((x)%4 == 0) && ((x)%100 != 0 || (x)%400 == 0)) +#if defined(TCL_WIDE_CLICKS) && defined(MAC_OSX_TCL) +#include <mach/mach_time.h> +#endif /* * TclpGetDate is coded to return a pointer to a 'struct tm'. For thread @@ -23,8 +22,9 @@ * variable is the key to this buffer. */ +#ifndef TCL_NO_DEPRECATED static Tcl_ThreadDataKey tmKey; -typedef struct ThreadSpecificData { +typedef struct { struct tm gmtime_buf; struct tm localtime_buf; } ThreadSpecificData; @@ -46,6 +46,8 @@ static char *lastTZ = NULL; /* Holds the last setting of the TZ static void SetTZIfNecessary(void); static void CleanupMemory(ClientData clientData); +#endif /* TCL_NO_DEPRECATED */ + static void NativeScaleTime(Tcl_Time *timebuf, ClientData clientData); static void NativeGetTime(Tcl_Time *timebuf, @@ -60,7 +62,7 @@ Tcl_ScaleTimeProc *tclScaleTimeProcPtr = NativeScaleTime; ClientData tclTimeClientData = NULL; /* - *----------------------------------------------------------------------------- + *---------------------------------------------------------------------- * * TclpGetSeconds -- * @@ -73,7 +75,7 @@ ClientData tclTimeClientData = NULL; * Side effects: * None. * - *----------------------------------------------------------------------------- + *---------------------------------------------------------------------- */ unsigned long @@ -83,7 +85,7 @@ TclpGetSeconds(void) } /* - *----------------------------------------------------------------------------- + *---------------------------------------------------------------------- * * TclpGetClicks -- * @@ -98,7 +100,7 @@ TclpGetSeconds(void) * Side effects: * None. * - *----------------------------------------------------------------------------- + *---------------------------------------------------------------------- */ unsigned long @@ -110,7 +112,7 @@ TclpGetClicks(void) if (tclGetTimeProcPtr != NativeGetTime) { Tcl_Time time; - (*tclGetTimeProcPtr) (&time, tclTimeClientData); + tclGetTimeProcPtr(&time, tclTimeClientData); now = time.sec*1000000 + time.usec; } else { /* @@ -123,24 +125,26 @@ TclpGetClicks(void) #else Tcl_Time time; - (*tclGetTimeProcPtr) (&time, tclTimeClientData); + tclGetTimeProcPtr(&time, tclTimeClientData); now = time.sec*1000000 + time.usec; #endif return now; } +#ifdef TCL_WIDE_CLICKS /* *---------------------------------------------------------------------- * - * TclpGetTimeZone -- + * TclpGetWideClicks -- * - * Determines the current timezone. The method varies wildly between - * different platform implementations, so its hidden in this function. + * This procedure returns a WideInt value that represents the highest + * resolution clock available on the system. There are no garantees on + * what the resolution will be. In Tcl we will call this value a "click". + * The start time is also system dependant. * * Results: - * The return value is the local time zone, measured in minutes away from - * GMT (-ve for east, +ve for west). + * Number of WideInt clicks from some start time. * * Side effects: * None. @@ -148,103 +152,74 @@ TclpGetClicks(void) *---------------------------------------------------------------------- */ -int -TclpGetTimeZone( - unsigned long currentTime) +Tcl_WideInt +TclpGetWideClicks(void) { - int timeZone; + Tcl_WideInt now; - /* - * We prefer first to use the time zone in "struct tm" if the structure - * contains such a member. Following that, we try to locate the external - * 'timezone' variable and use its value. If both of those methods fail, - * we attempt to convert a known time to local time and use the difference - * from UTC as the local time zone. In all cases, we need to undo any - * Daylight Saving Time adjustment. - */ - -#if defined(HAVE_TM_TZADJ) -#define TCL_GOT_TIMEZONE - /* - * Struct tm contains tm_tzadj - that value may be used. - */ - - time_t curTime = (time_t) currentTime; - struct tm *timeDataPtr = TclpLocaltime(&curTime); + if (tclGetTimeProcPtr != NativeGetTime) { + Tcl_Time time; - timeZone = timeDataPtr->tm_tzadj / 60; - if (timeDataPtr->tm_isdst) { - timeZone += 60; - } + tclGetTimeProcPtr(&time, tclTimeClientData); + now = ((Tcl_WideInt)time.sec)*1000000 + time.usec; + } else { +#ifdef MAC_OSX_TCL + now = (Tcl_WideInt) (mach_absolute_time() & INT64_MAX); +#else +#error Wide high-resolution clicks not implemented on this platform #endif - -#if defined(HAVE_TM_GMTOFF) && !defined (TCL_GOT_TIMEZONE) -#define TCL_GOT_TIMEZONE - /* - * Struct tm contains tm_gmtoff - that value may be used. - */ - - time_t curTime = (time_t) currentTime; - struct tm *timeDataPtr = TclpLocaltime(&curTime); - - timeZone = -(timeDataPtr->tm_gmtoff / 60); - if (timeDataPtr->tm_isdst) { - timeZone += 60; } -#endif -#if defined(HAVE_TIMEZONE_VAR) && !defined(TCL_GOT_TIMEZONE) && !defined(USE_DELTA_FOR_TZ) -#define TCL_GOT_TIMEZONE - /* - * The 'timezone' external var is present and may be used. - */ + return now; +} + +/* + *---------------------------------------------------------------------- + * + * TclpWideClicksToNanoseconds -- + * + * This procedure converts click values from the TclpGetWideClicks native + * resolution to nanosecond resolution. + * + * Results: + * Number of nanoseconds from some start time. + * + * Side effects: + * None. + * + *---------------------------------------------------------------------- + */ - SetTZIfNecessary(); +double +TclpWideClicksToNanoseconds( + Tcl_WideInt clicks) +{ + double nsec; - /* - * Note: this is not a typo in "timezone" below! See tzset documentation - * for details. - */ + if (tclGetTimeProcPtr != NativeGetTime) { + nsec = clicks * 1000; + } else { +#ifdef MAC_OSX_TCL + static mach_timebase_info_data_t tb; + static uint64_t maxClicksForUInt64; - timeZone = timezone / 60; + if (!tb.denom) { + mach_timebase_info(&tb); + maxClicksForUInt64 = UINT64_MAX / tb.numer; + } + if ((uint64_t) clicks < maxClicksForUInt64) { + nsec = ((uint64_t) clicks) * tb.numer / tb.denom; + } else { + nsec = ((long double) (uint64_t) clicks) * tb.numer / tb.denom; + } +#else +#error Wide high-resolution clicks not implemented on this platform #endif - -#if !defined(TCL_GOT_TIMEZONE) -#define TCL_GOT_TIMEZONE - /* - * Fallback - determine time zone with a known reference time. - */ - - time_t tt; - struct tm *stm; - - tt = 849268800L; /* 1996-11-29 12:00:00 GMT */ - stm = TclpLocaltime(&tt); /* eg 1996-11-29 6:00:00 CST6CDT */ - - /* - * The calculation below assumes a max of +12 or -12 hours from GMT. - */ - - timeZone = (12 - stm->tm_hour)*60 + (0 - stm->tm_min); - if (stm->tm_isdst) { - timeZone += 60; } - /* - * Now have offset for our known reference time, eg +360 for CST6CDT. - */ -#endif - -#ifndef TCL_GOT_TIMEZONE - /* - * Cause fatal compile error, we don't know how to get timezone. - */ - -#error autoconf did not figure out how to determine the timezone. -#endif - - return timeZone; + return nsec; } +#endif /* TCL_WIDE_CLICKS */ /* *---------------------------------------------------------------------- @@ -270,7 +245,7 @@ void Tcl_GetTime( Tcl_Time *timePtr) /* Location to store time information. */ { - (*tclGetTimeProcPtr) (timePtr, tclTimeClientData); + tclGetTimeProcPtr(timePtr, tclTimeClientData); } /* @@ -291,9 +266,10 @@ Tcl_GetTime( *---------------------------------------------------------------------- */ +#ifndef TCL_NO_DEPRECATED struct tm * TclpGetDate( - CONST time_t *time, + const time_t *time, int useGMT) { if (useGMT) { @@ -308,8 +284,7 @@ TclpGetDate( * * TclpGmtime -- * - * Wrapper around the 'gmtime' library function to make it thread - * safe. + * Wrapper around the 'gmtime' library function to make it thread safe. * * Results: * Returns a pointer to a 'struct tm' in thread-specific data. @@ -322,7 +297,7 @@ TclpGetDate( struct tm * TclpGmtime( - CONST time_t *timePtr) /* Pointer to the number of seconds since the + const time_t *timePtr) /* Pointer to the number of seconds since the * local system's epoch */ { /* @@ -332,26 +307,14 @@ TclpGmtime( ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&tmKey); #ifdef HAVE_GMTIME_R - gmtime_r(timePtr, &(tsdPtr->gmtime_buf)); + gmtime_r(timePtr, &tsdPtr->gmtime_buf); #else Tcl_MutexLock(&tmMutex); - memcpy((VOID *) &(tsdPtr->gmtime_buf), (VOID *) gmtime(timePtr), - sizeof(struct tm)); + memcpy(&tsdPtr->gmtime_buf, gmtime(timePtr), sizeof(struct tm)); Tcl_MutexUnlock(&tmMutex); #endif - return &(tsdPtr->gmtime_buf); -} - -/* - * Forwarder for obsolete item in Stubs - */ - -struct tm * -TclpGmtime_unix( - CONST time_t *timePtr) -{ - return TclpGmtime(timePtr); + return &tsdPtr->gmtime_buf; } /* @@ -373,7 +336,7 @@ TclpGmtime_unix( struct tm * TclpLocaltime( - CONST time_t *timePtr) /* Pointer to the number of seconds since the + const time_t *timePtr) /* Pointer to the number of seconds since the * local system's epoch */ { /* @@ -384,25 +347,16 @@ TclpLocaltime( SetTZIfNecessary(); #ifdef HAVE_LOCALTIME_R - localtime_r(timePtr, &(tsdPtr->localtime_buf)); + localtime_r(timePtr, &tsdPtr->localtime_buf); #else Tcl_MutexLock(&tmMutex); - memcpy((VOID *) &(tsdPtr->localtime_buf), (VOID *) localtime(timePtr), - sizeof(struct tm)); + memcpy(&tsdPtr->localtime_buf, localtime(timePtr), sizeof(struct tm)); Tcl_MutexUnlock(&tmMutex); #endif - return &(tsdPtr->localtime_buf); -} -/* - * Forwarder for obsolete item in Stubs - */ -struct tm* -TclpLocaltime_unix( - CONST time_t *timePtr) -{ - return TclpLocaltime(timePtr); + return &tsdPtr->localtime_buf; } +#endif /* TCL_NO_DEPRECATED */ /* *---------------------------------------------------------------------- @@ -513,9 +467,8 @@ NativeGetTime( ClientData clientData) { struct timeval tv; - struct timezone tz; - (void) gettimeofday(&tv, &tz); + (void) gettimeofday(&tv, NULL); timePtr->sec = tv.tv_sec; timePtr->usec = tv.tv_usec; } @@ -538,10 +491,11 @@ NativeGetTime( *---------------------------------------------------------------------- */ +#ifndef TCL_NO_DEPRECATED static void SetTZIfNecessary(void) { - CONST char *newTZ = getenv("TZ"); + const char *newTZ = getenv("TZ"); Tcl_MutexLock(&tmMutex); if (newTZ == NULL) { @@ -550,11 +504,11 @@ SetTZIfNecessary(void) if (lastTZ == NULL || strcmp(lastTZ, newTZ)) { tzset(); if (lastTZ == NULL) { - Tcl_CreateExitHandler(CleanupMemory, (ClientData) NULL); + Tcl_CreateExitHandler(CleanupMemory, NULL); } else { - Tcl_Free(lastTZ); + ckfree(lastTZ); } - lastTZ = Tcl_Alloc(strlen(newTZ) + 1); + lastTZ = ckalloc(strlen(newTZ) + 1); strcpy(lastTZ, newTZ); } Tcl_MutexUnlock(&tmMutex); @@ -581,8 +535,9 @@ static void CleanupMemory( ClientData ignored) { - Tcl_Free(lastTZ); + ckfree(lastTZ); } +#endif /* TCL_NO_DEPRECATED */ /* * Local Variables: |