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29 lines
359 B
Go
29 lines
359 B
Go
package internal
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import (
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"context"
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)
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type CtxMutex chan struct{}
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func NewCtxMutex() CtxMutex {
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return make(CtxMutex, 1)
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}
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func (m CtxMutex) Lock(ctx context.Context) error {
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select {
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case m <- struct{}{}:
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return nil
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case <-ctx.Done():
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return ctx.Err()
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}
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}
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func (m CtxMutex) Unlock() {
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select {
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case <-m:
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default:
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panic("not locked")
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}
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}
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