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19 lines
427 B
Go
19 lines
427 B
Go
package syncx
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import "sync/atomic"
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// A OnceGuard is used to make sure a resouce can be taken once.
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type OnceGuard struct {
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done uint32
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}
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// Taken checks if the resource is taken.
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func (og *OnceGuard) Taken() bool {
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return atomic.LoadUint32(&og.done) == 1
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}
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// Take takes the resource, returns true on success, false for otherwise.
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func (og *OnceGuard) Take() bool {
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return atomic.CompareAndSwapUint32(&og.done, 0, 1)
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}
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