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Ensures updates even when the event queue is empty.

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This commit is contained in:
Thomas Harte 2019-10-17 23:59:43 -04:00
parent 696af5c3a6
commit 2e86dada1d
1 changed files with 22 additions and 19 deletions
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41
Components/SerialPort/SerialPort.cpp
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@ -16,30 +16,33 @@ void Line::set_writer_clock_rate(int clock_rate) {
void Line::advance_writer(int cycles) {
remaining_delays_ = std::max(remaining_delays_ - cycles, 0);
while(!events_.empty()) {
if(events_.front().delay < cycles) {
cycles -= events_.front().delay;
write_cycles_since_delegate_call_ += events_.front().delay;
const auto old_level = level_;
if(events_.empty()) {
write_cycles_since_delegate_call_ += cycles;
if(write_cycles_since_delegate_call_ > 256) update_delegate(level_);
} else {
while(!events_.empty()) {
if(events_.front().delay < cycles) {
cycles -= events_.front().delay;
write_cycles_since_delegate_call_ += events_.front().delay;
const auto old_level = level_;
auto iterator = events_.begin() + 1;
while(iterator != events_.end() && iterator->type != Event::Delay) {
level_ = iterator->type == Event::SetHigh;
++iterator;
}
events_.erase(events_.begin(), iterator);
auto iterator = events_.begin() + 1;
while(iterator != events_.end() && iterator->type != Event::Delay) {
level_ = iterator->type == Event::SetHigh;
++iterator;
}
events_.erase(events_.begin(), iterator);
if(old_level != level_) {
update_delegate(old_level);
if(old_level != level_) {
update_delegate(old_level);
}
} else {
events_.front().delay -= cycles;
write_cycles_since_delegate_call_ += cycles;
break;
}
} else {
events_.front().delay -= cycles;
write_cycles_since_delegate_call_ += cycles;
break;
}
}
// TODO: some sort of ongoing update_delegate() ?
}
void Line::write(bool level) {