零是有效的句柄吗? [英] Is zero ever a valid handle?
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问题描述
.NET Framework中有一个SafeHandleZeroOrMinusOneIsInvalid
类,还有一个SafeHandleMinusOneIsInvalid
类.
There is a SafeHandleZeroOrMinusOneIsInvalid
class in the .NET Framework, as well as a SafeHandleMinusOneIsInvalid
class.
这是为什么?在哪种情况下零是有效的句柄?
Why is this? In which situations is zero ever a valid handle?
推荐答案
As additional lecture to the other answers, see this OldNewThing blog entry about inconsistent handle return values.
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