问题描述
两个问题：
1。
在 ntdef.h中， NTSTATUS 的定义如下：
In "ntdef.h" the NTSTATUS is defined as follow:
typedef __success(return >= 0) LONG NTSTATUS;
__ success（return> = 0）到底是什么？
what the hell is the "__success(return >= 0)"?
2。
在 ntstatus.h中， STATUS_SUCCESS 定义为0。
In "ntstatus.h", STATUS_SUCCESS is defined to 0.
#define STATUS_SUCCESS ((NTSTATUS)0x00000000L) // ntsubauth
但是 ntdef.h中的 NT_SUCCESS 宏是：
But the NT_SUCCESS macro in "ntdef.h" is:
#define NT_SUCCESS(Status) (((NTSTATUS)(Status)) >= 0)
应该不是状态== 0吗？
Shouldn't it be "Status == 0" ?
推荐答案
__成功是在SpecStrings_strict中定义的高级注释 .h，其定义如下。
__success is an "Advanced Annotation" defined in SpecStrings_strict.h, which defines it as follows.
* __success(expr) T f() : indicates whether function f succeeded or
* not. If is true at exit, all the function's guarantees (as given
* by other annotations) must hold. If is false at exit, the caller
* should not expect any of the function's guarantees to hold. If not used,
* the function must always satisfy its guarantees. Added automatically to
* functions that indicate success in standard ways, such as by returning an
* HRESULT.
NT_SUCCESS 不能对<$ c进行严格测试的原因$ c> STATUS_SUCCESS（0）可能是其他代码，例如 STATUS_PENDING 实际上并不是失败。
The reason that NT_SUCCESS doesn't do a strict test against STATUS_SUCCESS (0) is probably that other codes like STATUS_PENDING aren't actually failures.
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