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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 | 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 22x 16305x 16305x 16305x 22x 22x 16305x 16305x 160x 160x 160x 160x 160x 160x 160x 160x 160x 160x 160x 160x 160x 160x 16305x 22x 508x 508x 508x 38x 38x 38x 508x 22x 22x 22x 22x 22x | '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 }; |