30 lines
616 B
Go
30 lines
616 B
Go
// Tokens for controlling concurrency
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package pacer
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// TokenDispenser is for controlling concurrency
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type TokenDispenser struct {
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tokens chan struct{}
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}
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// NewTokenDispenser makes a pool of n tokens
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func NewTokenDispenser(n int) *TokenDispenser {
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td := &TokenDispenser{
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tokens: make(chan struct{}, n),
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}
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// Fill up the upload tokens
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for i := 0; i < n; i++ {
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td.tokens <- struct{}{}
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}
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return td
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}
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// Get gets a token from the pool - don't forget to return it with Put
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func (td *TokenDispenser) Get() {
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<-td.tokens
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}
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// Put returns a token
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func (td *TokenDispenser) Put() {
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td.tokens <- struct{}{}
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}
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