Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 | 20x 20x 20x 20x 20x 20x 20x 20x 20x 20x 20x 20x 20x 20x 20x 20x 56x 56x 56x 20x 20x 56x 56x 56x 20x 879x 879x 879x 37x 37x 37x 879x 20x 20x 20x 20x 20x | 'use strict';
const {
FunctionPrototypeBind,
SafeMap,
} = primordials;
const {
errnoException,
} = require('internal/errors');
const { signals } = internalBinding('constants').os;
let Signal;
const signalWraps = new SafeMap();
function isSignal(event) {
return typeof event === 'string' && signals[event] !== undefined;
}
// Detect presence of a listener for the special signal types
function startListeningIfSignal(type) {
if (isSignal(type) && !signalWraps.has(type)) {
if (Signal === undefined)
Signal = internalBinding('signal_wrap').Signal;
const wrap = new Signal();
wrap.unref();
wrap.onsignal = FunctionPrototypeBind(process.emit, process, type, type);
const signum = signals[type];
const err = wrap.start(signum);
if (err) {
wrap.close();
throw errnoException(err, 'uv_signal_start');
}
signalWraps.set(type, wrap);
}
}
function stopListeningIfSignal(type) {
const wrap = signalWraps.get(type);
if (wrap !== undefined && process.listenerCount(type) === 0) {
wrap.close();
signalWraps.delete(type);
}
}
module.exports = {
startListeningIfSignal,
stopListeningIfSignal
};
|