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18 lines
415 B
Go
18 lines
415 B
Go
package utils
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import (
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"reflect"
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"unsafe"
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)
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func IsChanClosed(ch interface{}) bool {
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if reflect.TypeOf(ch).Kind() != reflect.Chan {
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panic("object is not a channel.")
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}
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ptr := *(*uintptr)(unsafe.Pointer(uintptr(unsafe.Pointer(&ch)) + unsafe.Sizeof(uint(0))))
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ptr += unsafe.Sizeof(uint(0)) * 2
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ptr += unsafe.Sizeof(uintptr(0))
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ptr += unsafe.Sizeof(uint16(0))
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return *(*uint32)(unsafe.Pointer(ptr)) > 0
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}
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