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401cf81034
This commit modernizes Go usage. This was done with:
go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix -test ./...
Then files needed to be `go fmt`ed and a few comments needed to be
restored.
The modernizations include replacing
- if/else conditional assignment by a call to the built-in min or max functions added in go1.21
- sort.Slice(x, func(i, j int) bool) { return s[i] < s[j] } by a call to slices.Sort(s), added in go1.21
- interface{} by the 'any' type added in go1.18
- append([]T(nil), s...) by slices.Clone(s) or slices.Concat(s), added in go1.21
- loop around an m[k]=v map update by a call to one of the Collect, Copy, Clone, or Insert functions from the maps package, added in go1.21
- []byte(fmt.Sprintf...) by fmt.Appendf(nil, ...), added in go1.19
- append(s[:i], s[i+1]...) by slices.Delete(s, i, i+1), added in go1.21
- a 3-clause for i := 0; i < n; i++ {} loop by for i := range n {}, added in go1.22
31 lines
605 B
Go
31 lines
605 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 range n {
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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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