Tcl Source Code

static Tcl_ObjCmdProc	ClockAddObjCmd;
static int		ClockValidDate(DateInfo *,
			    ClockFmtScnCmdArgs *, int stage);
static struct tm *	ThreadSafeLocalTime(const time_t *);
static size_t		TzsetIfNecessary(void);
static void		ClockDeleteCmdProc(void *);
static Tcl_ObjCmdProc	ClockSafeCatchCmd;
static void		ClockFinalize(void *);
/*
 * Structure containing description of "native" clock commands to create.
 */

struct ClockCommand {
    const char *name;		/* The tail of the command name. The full name
				 * is "::tcl::clock::<name>". When NULL marks

    const struct ClockCommand *clockCmdPtr;
    char cmdName[50];		/* Buffer large enough to hold the string
				 *::tcl::clock::GetJulianDayFromEraYearMonthDay
				 * plus a terminating NUL. */
    Command *cmdPtr;
    ClockClientData *data;
    int i;

    static int initialized = 0;	/* global clock engine initialized (in process) */
    /*
     * Register handler to finalize clock on exit.
     */
    if (!initialized) {
	Tcl_CreateExitHandler(ClockFinalize, NULL);
	initialized = 1;
    }

    /*
     * Safe interps get [::clock] as alias to a parent, so do not need their
     * own copies of the support routines.
     */

    if (Tcl_IsSafe(interp)) {

#else
#define WCHAR char
#define wcslen strlen
#define wcscmp strcmp
#define wcscpy strcpy
#endif
#define TZ_INIT_MARKER	((WCHAR *) INT2PTR(-1))

typedef struct ClockTzStatic {
    WCHAR *was;			/* Previous value of TZ. */
    long long lastRefresh;	/* Used for latency before next refresh. */
    size_t epoch;		/* Epoch, signals that TZ changed. */
    size_t envEpoch;		/* Last env epoch, for faster signaling,
				 * that TZ changed via TCL */
} ClockTzStatic;
static ClockTzStatic tz = {	/* Global timezone info; protected by
				 * clockMutex.*/
    TZ_INIT_MARKER, 0, 0, 0
};

static size_t
TzsetIfNecessary(void)
{











    const WCHAR *tzNow;		/* Current value of TZ. */
    Tcl_Time now;		/* Current time. */
    size_t epoch;		/* The tz.epoch that the TZ was read at. */

    /*
     * Prevent performance regression on some platforms by resolving of system time zone:
     * small latency for check whether environment was changed (once per second)

    } else {
	epoch = tz.epoch;
    }
    Tcl_MutexUnlock(&clockMutex);

    return epoch;
}

static void
ClockFinalize(
    TCL_UNUSED(void *))
{
    ClockFrmScnFinalize();

    if (tz.was && tz.was != TZ_INIT_MARKER) {
	Tcl_Free(tz.was);
    }
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */

static void		ClockFmtObj_FreeInternalRep(Tcl_Obj *objPtr);
static int		ClockFmtObj_SetFromAny(Tcl_Interp *, Tcl_Obj *objPtr);
static void		ClockFmtObj_UpdateString(Tcl_Obj *objPtr);

TCL_DECLARE_MUTEX(ClockFmtMutex);	/* Serializes access to common format list. */

static void		ClockFmtScnStorageDelete(ClockFmtScnStorage *fss);


/*
 * Derivation of tclStringHashKeyType with another allocEntryProc
 */

static Tcl_HashKeyType ClockFmtScnStorageHashKeyType;

	ClockFmtScnStorageHashKeyType.freeEntryProc = ClockFmtScnStorageFreeProc;

	/* initialize hash table */
	Tcl_InitCustomHashTable(&FmtScnHashTable, TCL_CUSTOM_TYPE_KEYS,
		&ClockFmtScnStorageHashKeyType);

	initialized = 1;

    }

    /* get or create entry (and alocate storage) */
    hPtr = Tcl_CreateHashEntry(&FmtScnHashTable, strFmt, &isNew);
    if (hPtr != NULL) {
	fss = FmtScn4HashEntry(hPtr);

ClockFrmScnClearCaches(void)
{
    Tcl_MutexLock(&ClockFmtMutex);
    /* clear caches ... */
    Tcl_MutexUnlock(&ClockFmtMutex);
}

void
ClockFrmScnFinalize()

{
    if (!initialized) {
	return;
    }
    Tcl_MutexLock(&ClockFmtMutex);
#if CLOCK_FMT_SCN_STORAGE_GC_SIZE > 0
    /* clear GC */
    ClockFmtScnStorage_GC.stackPtr = NULL;
    ClockFmtScnStorage_GC.stackBound = NULL;
    ClockFmtScnStorage_GC.count = 0;
#endif

			    Tcl_Obj *objPtr);
MODULE_SCOPE Tcl_Obj *	ClockLocalizeFormat(ClockFmtScnCmdArgs *opts);
MODULE_SCOPE int	ClockScan(DateInfo *info, Tcl_Obj *strObj,
			    ClockFmtScnCmdArgs *opts);
MODULE_SCOPE int	ClockFormat(DateFormat *dateFmt,
			    ClockFmtScnCmdArgs *opts);
MODULE_SCOPE void	ClockFrmScnClearCaches(void);
MODULE_SCOPE void	ClockFrmScnFinalize();

#endif /* _TCLCLOCK_H */