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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 16423x 16423x 16423x 20x 20x 16423x 16423x 165x 165x 165x 165x 165x 165x 165x 165x 165x 165x 165x 165x 165x 165x 16423x 20x 611x 611x 611x 38x 38x 38x 611x 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 }; |