/* Calculates at1 - at2.
* The only constraint here is that this needs to be the inverse
* of CFAbsoluteTimeByAddingGregorianUnits(), but that's a very rigid constraint.
* Unfortunately, due to the nonuniformity of the year and month units, this
* inversion essentially has to approximate until it finds the answer.
*/
CFGregorianUnits CFAbsoluteTimeGetDifferenceAsGregorianUnits(CFAbsoluteTime at1, CFAbsoluteTime at2,
CFTimeZoneRef tz,
CFOptionFlags unitFlags)
{
const int32_t seconds[5] = {366 * 24 * 3600, 31 * 24 * 3600, 24 * 3600, 3600, 60};
CFGregorianUnits units = {0, 0, 0, 0, 0, 0.0};
CFAbsoluteTime atold, atnew = at2;
int32_t idx, incr;
incr = (at2 < at1) ? 1 : -1;
/* Successive approximation: years, then months, then days, then hours, then minutes. */
for (idx = 0; idx < 5; idx++) {
if (unitFlags & (1 << idx)) {
((int32_t*)&units)[idx] = -3 * incr + (int32_t)((at1 - atnew) / seconds[idx]);
do {
atold = atnew;
((int32_t*)&units)[idx] += incr;
atnew = CFAbsoluteTimeAddGregorianUnits(at2, tz, units);
} while ((1 == incr && atnew <= at1) || (-1 == incr && at1 <= atnew));
((int32_t*)&units)[idx] -= incr;
atnew = atold;
}
}
if (unitFlags & kCFGregorianUnitsSeconds) {
units.seconds = at1 - atnew;
}
if (0.0 == units.seconds) {
units.seconds = 0.0; // stomp out possible -0.0
}
return units;
}
bool wxOSXTimerImpl::Start( int milliseconds, bool mode )
{
(void)wxTimerImpl::Start(milliseconds, mode);
wxCHECK_MSG( m_milli > 0, false, wxT("invalid value for timer timeout") );
wxCHECK_MSG( m_info->m_timerRef == NULL, false, wxT("attempting to restart a timer") );
CFGregorianUnits gumilli ;
memset(&gumilli,0,sizeof(gumilli) );
gumilli.seconds = m_milli / 1000.0;
CFRunLoopTimerContext ctx ;
memset( &ctx, 0 , sizeof(ctx) );
ctx.version = 0;
ctx.info = this;
m_info->m_timer = this;
m_info->m_timerRef = CFRunLoopTimerCreate(
kCFAllocatorDefault,
CFAbsoluteTimeAddGregorianUnits( CFAbsoluteTimeGetCurrent() , NULL, gumilli ),
IsOneShot() ? 0 : CFTimeInterval( m_milli / 1000.0 ) ,
0, 0, wxProcessTimer, &ctx);
wxASSERT_MSG( m_info->m_timerRef != NULL, wxT("unable to create timer"));
CFRunLoopRef runLoop = 0;
#if wxOSX_USE_IPHONE
runLoop = CFRunLoopGetMain();
#else
runLoop = CFRunLoopGetCurrent();
#endif
CFRunLoopAddTimer( runLoop, m_info->m_timerRef, kCFRunLoopCommonModes) ;
return true;
}
