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simplify clock_device (nw)

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This commit is contained in:
smf- 2018-09-25 23:50:55 +01:00
parent a2f529a761
commit 17db38f44d
2 changed files with 13 additions and 39 deletions
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49
src/devices/machine/clock.cpp
View File

@ -22,48 +22,25 @@ void clock_device::device_start()
void clock_device::device_clock_changed() void clock_device::device_clock_changed()
{ {
update_timer(); if (!m_signal_handler.isnull() && m_clock > 0)
} {
if (m_timer == nullptr)
m_timer = timer_alloc(0);
attotime clock_device::period() const attotime period(attotime::from_hz(m_clock * 2));
{
if (m_clock > 0)
return attotime::from_hz(m_clock * 2);
return attotime::never; attotime next = period - m_timer->elapsed();
if (next < attotime::zero)
next = attotime::zero;
m_timer->adjust(next, 0, period);
}
else if (m_timer != nullptr)
m_timer->adjust(attotime::never);
} }
void clock_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) void clock_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
{ {
m_signal = !m_signal; m_signal = !m_signal;
m_signal_handler(m_signal); m_signal_handler(m_signal);
m_timer->adjust(period());
}
void clock_device::update_timer()
{
if (!m_signal_handler.isnull() && m_clock > 0)
{
if (m_timer == nullptr)
{
m_timer = timer_alloc(0);
m_timer->adjust(period());
}
else
{
attotime next = period() - m_timer->elapsed();
if (next < attotime::zero)
{
next = attotime::zero;
}
m_timer->adjust(next);
}
}
else if (m_timer != nullptr)
{
m_timer->adjust(attotime::never);
}
} }

3
src/devices/machine/clock.h
View File

@ -26,9 +26,6 @@ protected:
virtual void device_clock_changed() override; virtual void device_clock_changed() override;
private: private:
void update_timer();
attotime period();
int m_signal; int m_signal;
emu_timer *m_timer; emu_timer *m_timer;