38 lines
1.0 KiB
JavaScript
38 lines
1.0 KiB
JavaScript
const exec = require('child_process').execSync;
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module.exports = class Darwin {
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static getTotalMemory() {
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return parseInt(exec('sysctl -n hw.memsize', {'encoding': 'utf8'}), 10);
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}
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static getUsedMemory() {
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const memoryTypes = ['active', 'wired down', 'inactive'];
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const pageSize = this.getPageSize();
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let totalMemoryUsed = 0;
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memoryTypes.forEach((memoryType) => {
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totalMemoryUsed += this.getMemoryTypeUsage(memoryType);
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});
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return (totalMemoryUsed * pageSize);
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}
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static getFreeMemory() {
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return this.getTotalMemory() - this.getUsedMemory();
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}
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static getPageSize() {
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return parseInt(exec('sysctl -n hw.pagesize', {'encoding': 'utf8'}), 10);
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}
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static getMemoryTypeUsage(memoryType) {
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let position = 3;
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if (1 < memoryType.split(' ').length) {
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position = 4;
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}
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return parseInt(exec(`vm_stat | grep 'Pages ${memoryType}:' | awk '{print $${position}}'`, {'encoding': 'utf8'}), 10);
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}
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};
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