main.js (1891B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2019 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 'use strict'; 20 21 // MODULES // 22 23 var native = require( 'fs' ).close; 24 var isNonNegativeInteger = require( '@stdlib/assert/is-nonnegative-integer' ).isPrimitive; 25 var isFunction = require( '@stdlib/assert/is-function' ); 26 27 28 // MAIN // 29 30 /** 31 * Asynchronously closes a file descriptor. 32 * 33 * @param {NonNegativeInteger} fd - file descriptor 34 * @param {Function} clbk - callback to invoke after closing a file descriptor 35 * @throws {TypeError} first argument must be a valid file descriptor (nonnegative integer) 36 * @throws {TypeError} last argument must be a function 37 * 38 * @example 39 * var openSync = require( '@stdlib/fs/open' ).sync; 40 * 41 * function done( error ) { 42 * if ( error ) { 43 * throw error; 44 * } 45 * } 46 * 47 * var fd = openSync( __filename, 'r+' ); 48 * if ( fd instanceof Error ) { 49 * throw fd; 50 * } 51 * 52 * close( fd, done ); 53 */ 54 function close( fd, clbk ) { // eslint-disable-line stdlib/no-redeclare 55 if ( !isNonNegativeInteger( fd ) ) { 56 throw new TypeError( 'invalid argument. First argument must be a valid file descriptor (nonnegative integer). Value: `' + fd + '`.' ); 57 } 58 if ( !isFunction( clbk ) ) { 59 throw new TypeError( 'invalid argument. Last argument must be a function. VAlue: `' + clbk + '`.' ); 60 } 61 native( fd, clbk ); 62 } 63 64 65 // EXPORTS // 66 67 module.exports = close;