wxFileOffset CStatusLineCtrl::GetCurrentSpeed()
{
if (!m_pStatus)
return -1;
const wxTimeSpan timeDiff( wxDateTime::UNow().Subtract(m_gcLastTimeStamp) );
if (timeDiff.GetMilliseconds().GetLo() <= 2000)
return m_gcLastSpeed;
m_gcLastTimeStamp = wxDateTime::UNow();
if (m_gcLastOffset == -1)
m_gcLastOffset = m_pStatus->startOffset;
const wxFileOffset fileOffsetDiff = m_pStatus->currentOffset - m_gcLastOffset;
m_gcLastOffset = m_pStatus->currentOffset;
m_gcLastSpeed = fileOffsetDiff * 1000 / timeDiff.GetMilliseconds().GetLo();
return m_gcLastSpeed;
}
unsigned int CFileZillaEnginePrivate::GetRemainingReconnectDelay(const CServer& server)
{
std::list<t_failedLogins>::iterator iter = m_failedLogins.begin();
while (iter != m_failedLogins.end())
{
const wxTimeSpan span = wxDateTime::UNow() - iter->time;
const int delay = m_pOptions->GetOptionVal(OPTION_RECONNECTDELAY);
if (span.GetSeconds() >= delay)
{
std::list<t_failedLogins>::iterator prev = iter;
iter++;
m_failedLogins.erase(prev);
}
else if (!iter->critical && iter->server.GetHost() == server.GetHost() && iter->server.GetPort() == server.GetPort())
return delay * 1000 - span.GetMilliseconds().GetLo();
else if (iter->server == server)
return delay * 1000 - span.GetMilliseconds().GetLo();
else
iter++;
}
return 0;
}
bool Threading::Semaphore::WaitWithoutYield(const wxTimeSpan& timeout)
{
// This method is the reason why there has to be a special Darwin
// implementation of Semaphore. Note that semaphore_timedwait() is prone
// to returning with KERN_ABORTED, which basically signifies that some
// signal has worken it up. The best official "documentation" for
// semaphore_timedwait() is the way it's used in Grand Central Dispatch,
// which is open-source.
// on x86 platforms, mach_absolute_time() returns nanoseconds
// TODO(aktau): on iOS a scale value from mach_timebase_info will be necessary
u64 const kOneThousand = 1000;
u64 const kOneBillion = kOneThousand * kOneThousand * kOneThousand;
u64 const delta = timeout.GetMilliseconds().GetValue() * (kOneThousand * kOneThousand);
mach_timespec_t ts;
kern_return_t kr = KERN_ABORTED;
for (u64 now = mach_absolute_time(), deadline = now + delta;
kr == KERN_ABORTED; now = mach_absolute_time()) {
if (now > deadline) {
// timed out by definition
return false;
}
u64 timeleft = deadline - now;
ts.tv_sec = timeleft / kOneBillion;
ts.tv_nsec = timeleft % kOneBillion;
// possible return values of semaphore_timedwait() (from XNU sources):
// internal kernel val -> return value
// THREAD_INTERRUPTED -> KERN_ABORTED
// THREAD_TIMED_OUT -> KERN_OPERATION_TIMED_OUT
// THREAD_AWAKENED -> KERN_SUCCESS
// THREAD_RESTART -> KERN_TERMINATED
// default -> KERN_FAILURE
kr = semaphore_timedwait(m_sema, ts);
}
if (kr == KERN_OPERATION_TIMED_OUT) {
return false;
}
// while it's entirely possible to have KERN_FAILURE here, we should
// probably assert so we can study and correct the actual error here
// (the thread dying while someone is wainting for it).
MACH_CHECK(kr);
__atomic_sub_fetch(&m_counter, 1, __ATOMIC_SEQ_CST);
return true;
}