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 876x 876x 876x 38x 38x 38x 876x 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
};
|