#ifdef _LOCK_

#ifdef _LOCK_是一个条件编译指令，用于判断是否定义了宏_LOCK_。如果宏_LOCK_被定义为1，那么就会执行条件编译指令块中的代码，包括加锁和解锁操作。如果宏_LOCK_没有被定义或者被定义为其他值，那么条件编译指令块中的代码将被忽略。\[1\]\[2\]
#### 引用[.reference_title]
- *1* [线程互斥（加锁实现）](https://blog.csdn.net/leliyanga/article/details/9300155)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* *3* [Linux系统开发 | 线程同步与互斥](https://blog.csdn.net/feit2417/article/details/81302501)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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