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'use strict';
const is_reused_symbol = Symbol('isReused');
class FreeList {
constructor(name, max, ctor) {
this.name = name;
this.ctor = ctor;
this.max = max;
this.list = [];
}
alloc() {
let item;
if (this.list.length > 0) {
item = this.list.pop();
item[is_reused_symbol] = true;
} else {
item = this.ctor.apply(this, arguments);
item[is_reused_symbol] = false;
}
return item;
}
free(obj) {
if (this.list.length < this.max) {
this.list.push(obj);
return true;
}
return false;
}
}
module.exports = {
FreeList,
symbols: {
is_reused_symbol
}
};
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