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Support for UV_FS_O_FILEMAP was added in libuv in version 1.31.0. This exposes the flag in fs.constants. Refs: https://github.com/libuv/libuv/pull/2295 PR-URL: https://github.com/nodejs/node/pull/29260 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Ron Korving <ron@ronkorving.nl> Reviewed-By: James M Snell <jasnell@gmail.com>
30 lines
784 B
JavaScript
30 lines
784 B
JavaScript
'use strict';
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require('../common');
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const assert = require('assert');
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const fs = require('fs');
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const join = require('path').join;
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const {
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O_CREAT = 0,
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O_RDONLY = 0,
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O_TRUNC = 0,
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O_WRONLY = 0,
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UV_FS_O_FILEMAP = 0
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} = fs.constants;
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const tmpdir = require('../common/tmpdir');
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tmpdir.refresh();
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// Run this test on all platforms. While UV_FS_O_FILEMAP is only available on
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// Windows, it should be silently ignored on other platforms.
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const filename = join(tmpdir.path, 'fmap.txt');
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const text = 'Memory File Mapping Test';
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const mw = UV_FS_O_FILEMAP | O_TRUNC | O_CREAT | O_WRONLY;
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const mr = UV_FS_O_FILEMAP | O_RDONLY;
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fs.writeFileSync(filename, text, { flag: mw });
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const r1 = fs.readFileSync(filename, { encoding: 'utf8', flag: mr });
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assert.strictEqual(r1, text);
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