C11，6.2.4对象的存储持续时间，4（添加了重点）：
用存储级规范符声明标识符的对象 _thread_local 具有线程存储持续时间。
C11，7.5错误＆lt; errno.h＆gt; 2（添加了强调）：
errno 扩展到可修改的lvalue 201），该201）具有 int 和
是“线程存储持续时间”和“线程本地存储持续时间”同义词？
额外注意：当前的支持 _thread_local 独立于 __ stdc_no_threads __ ，而它是（可能）预计将取决于。
C11, 6.2.4 Storage durations of objects, 4 (emphasis added):
An object whose identifier is declared with the storage-class specifier _Thread_local has thread storage duration.
C11, 7.5 Errors <errno.h>, 2 (emphasis added):
errno which expands to a modifiable lvalue 201) that has type int and thread local storage
duration
Are "thread storage duration" and "thread local storage duration" the synonyms?
Extra note: currently the support of _Thread_local is independent of __STDC_NO_THREADS__ while it is (probably) expected to be dependent.
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这是我看到的唯一合理的解释，是的。规范第6.2.4/1段中存储持续时间的定义不包括“线程本地存储持续时间”：
但是，线程存储持续时间是用
_thread_local存储类规范声明的标识符的存储持续时间，在一般讨论中，描述与“线程local local”相关的对象相关的对象。在第7.5节中，我出现了“线程本地存储持续时间”（这是规格中该术语的唯一出现）构成编辑错误，但我认为预期的含义并不疑问。规格的说法强化了这一点（C11 7.5/3）。
errno在不同线程中可能具有不同的值可以通过两种方式解释：errno具有线程存储持续时间，或者errno的特殊，独特的特征，除了具有线程存储持续时间以外的其他方式提供。我发现（2）鉴于规格的整体，完全令人难以置信。
That's the only plausible interpretation I see, yes. The definition of storage duration in paragraph 6.2.4/1 of the spec does not include a "thread local storage duration":
However, thread storage duration is the storage duration of identifiers declared with the
_Thread_localstorage class specifier, and it is fairly common in general discussion to describe the objects associated with such identifiers as "thread local". I take the appearance of "thread local storage duration" in in section 7.5 -- which is the only appearance of that term in the spec -- to constitute an editorial error, but I don't think the intended meaning is in doubt. This is reinforced by the spec's remarks that(C11 7.5/3).
That
errnomay have different values in different threads can be explained in only two ways:errnohas thread storage duration, ORerrno, provided by some means other than it having thread storage duration.I find explanation (2) altogether implausible in light of the spec overall.
是的。他们是同一件事。
C11库文件的规范
errno.h告诉您，errno的行为应为：声明为：存储持续时间规范告诉您什么
_thread_local < /代码>表示Yes. They are the same thing.
The specification for the C11 library file
errno.his telling you thaterrnoshall behave as if declared as:and the storage duration specification is telling you what
_Thread_localmeans