> For the complete documentation index, see [llms.txt](https://book.bsdcn.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://book.bsdcn.org/man/pthread/pthread_mutexattr_getkind_np.3.md).

# pthread\_mutexattr\_getkind\_np.3

`pthread_mutexattr_getkind_np` — mutex 属性操作（遗留）

## 名称

`pthread_mutexattr_getkind_np`, `pthread_mutexattr_setkind_np`

## 库

libpthread

## 概要

```c
#include <pthread_np.h>

int
pthread_mutexattr_getkind_np(pthread_mutexattr_t attr);

int
pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind);
```

## 描述

*这些函数是 mutex 类型操作的已弃用且不可移植的实现。*

建议改用 pthread\_mutexattr\_gettype(3) 和 pthread\_mutexattr\_settype(3) 函数。

## 返回值

`pthread_mutexattr_getkind_np` 函数在成功时返回一个表示 mutex 属性 `attr` “类型”的正值；否则返回 -1，并设置全局变量 `errno` 以指示错误。

`pthread_mutexattr_setkind_np` 函数在成功时返回 0，否则返回一个错误编号以指示错误。

## 错误

`pthread_mutexattr_getkind_np` 和 `pthread_mutexattr_setkind_np` 函数在以下情况下将失败：

**`[EINVAL]`** 由 `attr` 指定的值无效。

## 参见

[pthread\_mutex\_destroy(3)](/man/pthread/pthread_mutex_destroy.3.md), [pthread\_mutex\_init(3)](/man/pthread/pthread_mutex_init.3.md), pthread\_mutexattr\_gettype(3), pthread\_mutexattr\_settype(3), [pthread\_np(3)](/man/pthread/pthread_np.3.md)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://book.bsdcn.org/man/pthread/pthread_mutexattr_getkind_np.3.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.