18 lines
413 B
Go
18 lines
413 B
Go
package password
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import "errors"
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var ErrBusy = errors.New("password computation is busy")
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// 所有协议和恢复流程共享一个计算名额；满载立即拒绝，不积压等待请求。
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var computationSlot = make(chan struct{}, 1)
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func acquireComputation() (func(), error) {
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select {
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case computationSlot <- struct{}{}:
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return func() { <-computationSlot }, nil
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default:
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return nil, ErrBusy
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}
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}
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