/*
 * Copyright 2012-2024 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

/*
 * Copyright 2012-2024 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

	JMP	(AX)(AX*4)
	JCS	2(PC)
	JMP	R13

// LTYPEN spec4	{ outcode($1, &$2); }
	NOP
	NOP	AX
	NOP	foo+4(SB)

// LTYPES spec5	{ outcode($1, &$2); }
	SHLL	CX, R12
	SHLL	CX, foo+4(SB)
	// Old syntax, still accepted:
	SHLL	CX, R11:AX // SHLL CX, AX, R11

// LTYPEM spec6	{ outcode($1, &$2); }
	MOVL	AX, R11
	MOVL	$4, R11
//	MOVL	AX, 0(AX):DS // no longer works - did it ever?

// LTYPEI spec7	{ outcode($1, &$2); }

pkg syscall (freebsd-arm64), const WUNTRACED = 2
pkg syscall (freebsd-arm64), const WUNTRACED ideal-int
pkg syscall (freebsd-arm64), func Accept(int) (int, Sockaddr, error)
pkg syscall (freebsd-arm64), func Accept4(int, int) (int, Sockaddr, error)
pkg syscall (freebsd-arm64), func Access(string, uint32) error
pkg syscall (freebsd-arm64), func Adjtime(*Timeval, *Timeval) error
pkg syscall (freebsd-arm64), func Bind(int, Sockaddr) error

/*
 * Copyright 2012-2024 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

pkg syscall (darwin-arm64), const WSTOPPED ideal-int
pkg syscall (darwin-arm64), const WUNTRACED = 2
pkg syscall (darwin-arm64), const WUNTRACED ideal-int
pkg syscall (darwin-arm64), func Accept(int) (int, Sockaddr, error)
pkg syscall (darwin-arm64), func Access(string, uint32) error
pkg syscall (darwin-arm64), func Adjtime(*Timeval, *Timeval) error
pkg syscall (darwin-arm64), func Bind(int, Sockaddr) error

* Обработка данных:
    * К примеру, если вы получаете файл, который должен пройти через медленный процесс, вы можете отправить ответ "Accepted" (HTTP 202) и отправить работу с файлом в фон.

## Использование класса `BackgroundTasks`

Сначала импортируйте `BackgroundTasks`, потом добавьте в функцию параметр с типом `BackgroundTasks`:

```Python hl_lines="1  13"

/*
 * Copyright 2012-2024 CodeLibs Project and the Others.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,

# 后台任务

你可以定义在返回响应后运行的后台任务。

这对需要在请求之后执行的操作很有用，但客户端不必在接收响应之前等待操作完成。

包括这些例子：

* 执行操作后发送的电子邮件通知：
    * 由于连接到电子邮件服务器并发送电子邮件往往很“慢”（几秒钟），您可以立即返回响应并在后台发送电子邮件通知。
* 处理数据：
    * 例如，假设您收到的文件必须经过一个缓慢的过程，您可以返回一个"Accepted"(HTTP 202)响应并在后台处理它。

## 使用 `BackgroundTasks`

首先导入 `BackgroundTasks` 并在 *路径操作函数* 中使用类型声明 `BackgroundTasks` 定义一个参数：

```Python hl_lines="1  13"
{!../../docs_src/background_tasks/tutorial001.py!}
```

* Any code that changes feature functionality must be done within 2 weeks of the release branch cutting. Even then it is
 at the discretion of the release managers if PRs will be accepted and merged into the release branch.
* All code merged in after the feature freeze must have an associated GitHub issue and a release note (exception for
  unit and integration test changes).