[英]What is the correct way to get the next value in every thread?
I have a multi-threaded scenario, I spool up 1000 threads: 我有一个多线程场景,我调整了1000个线程:
private ConcurrentDictionary<TableNames, int> _lastInsertedIds = new ConcurrentDictionary<TableNames, int>();
Parallel.For(0, 100, i => {
var id = ++_lastInsertedIds[TableNames.Scores];
});
How can I ensure the id is always the next highest no matter what the order of execution? 无论执行顺序如何,我如何确保id始终是最高的?
I would like to avoid using a manual lock object. 我想避免使用手动锁定对象。
You can use AddOrUpdate : 您可以使用AddOrUpdate :
Parallel.For(0, 100, i => {
var id = _lastInsertedIds.AddOrUpdate(TableNames.Scores, 1, (key, existing) => existing + 1);
});
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