> 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/man9/buf_lock.9.md).

# BUF\_LOCK.9

`BUF_LOCK` — 锁定缓冲区

## 名称

`BUF_LOCK`

## 概要

```c
#include <sys/param.h>

#include <sys/systm.h>

#include <sys/uio.h>

#include <sys/bio.h>

#include <sys/buf.h>

int
BUF_LOCK(struct buf *bp, int locktype)
```

## 描述

`BUF_LOCK` 函数锁定给定的缓冲区。如果锁已被持有，此调用将阻塞直到能获取锁，除非设置了 `LK_NOWAIT`。

其参数如下：

**`bp`** 要锁定的缓冲区。

**`locktype`** 控制锁类型的标志。详见 lockmgr(9)。

## 返回值

成功时返回 0。非零返回值的信息参见 lockmgr(9)。

## 参见

[buf(9)](/man/man9/buf.9.md), [BUF\_TIMELOCK(9)](/man/man9/buf_timelock.9.md), [BUF\_UNLOCK(9)](/man/man9/buf_unlock.9.md), lockmgr(9)

## 作者

本手册页由 Chad David <davidc@acns.ab.ca> 编写。


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