19 lines
486 B
Go
19 lines
486 B
Go
// Package passwordcapacity 管理所有密码计算入口共享的并发名额。
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package passwordcapacity
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import "errors"
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var ErrBusy = errors.New("password computation is busy")
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var computationSlot = make(chan struct{}, 1)
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// Acquire 满载时立即拒绝，不积压等待请求；调用方必须延迟释放名额。
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func Acquire() (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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