Linux runtime: overrun detection for real-time timers and for plc execution.
If real-time timer wakes-up PLC thread too late (10% over period), then
warning is logged.
If PLC code (IO retreive, execution, IO publish) takes longer than requested
PLC execution cycle, then warning is logged, and CPU hoogging is mitigated
by delaying next PLC execution a few cylces more until having at least
1ms minimal idle time.
// widget_back.ysl2
widget_desc("Back") {
longdesc
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Back widget brings focus back to previous page in history when clicked.
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shortdesc > Jump to previous page
}
widget_class("Back")
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on_click(evt) {
if(jump_history.length > 1){
let page_name, index;
do {
jump_history.pop(); // forget current page
if(jump_history.length == 0) return;
[page_name, index] = jump_history[jump_history.length-1];
} while(page_name == "ScreenSaver") // never go back to ScreenSaver
switch_page(page_name, index);
}
}
init() {
this.element.onclick = this.on_click.bind(this);
}
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