> 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_cleanup_push.3.md).

# pthread\_cleanup\_push.3

`pthread_cleanup_push` — 为线程退出添加清理函数

## 名称

`pthread_cleanup_push`

## 库

Lb libpthread

## 概要

`#include <pthread.h>`

`Ft void Fn pthread_cleanup_push void *cleanup_routinevoid * void *arg`

## 描述

`Fn pthread_cleanup_push` 函数将 `cleanup_routine` 添加到当前线程退出时调用的清理处理程序栈的栈顶。

调用 `cleanup_routine` 时，`arg` 将作为其唯一参数传递。

`Fn pthread_cleanup_push` 函数实现为一个打开新块的宏。对此函数的调用必须作为单独语句出现，并与同一词法作用域中后续对 [pthread\_cleanup\_pop(3)](/man/pthread/pthread_cleanup_pop.3.md) 的调用配对。

## 返回值

`Fn pthread_cleanup_push` 函数不返回任何值。

## 错误

无

## 参见

[pthread\_cleanup\_pop(3)](/man/pthread/pthread_cleanup_pop.3.md), [pthread\_exit(3)](/man/pthread/pthread_exit.3.md)

## 标准

`Fn pthread_cleanup_push` 函数遵循 ISO/IEC 9945-1:1996 ("POSIX.1") 标准。


---

# 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_cleanup_push.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.