并发系列（四）锁

Dear 丶 2021-11-08 22:10 750阅读 0赞

# 1.锁思维导图概览 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1NoZWxkb25fX0xlZQ_size_16_color_FFFFFF_t_70]

# 2.知识分点 #

### 2.1 悲观锁VS乐观锁 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1NoZWxkb25fX0xlZQ_size_16_color_FFFFFF_t_70 1]

### 2.2 自旋锁VS适应性自旋锁 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1NoZWxkb25fX0xlZQ_size_16_color_FFFFFF_t_70 2]

### 2.3 无锁 ###

![在这里插入图片描述][20190806171330941.png]

### 2.4 偏向锁 ###

![在这里插入图片描述][20190806171427133.png]

### 2.5 轻量级锁 ###

![在这里插入图片描述][20190806171513958.png]

### 2.6 重量级锁 ###

![在这里插入图片描述][20190806171639173.png]

![在这里插入图片描述][20190806171738349.png]

### 2.7 公平锁VS非公平锁 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1NoZWxkb25fX0xlZQ_size_16_color_FFFFFF_t_70 3]

### 2.8 可重入锁VS不可重入锁 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1NoZWxkb25fX0xlZQ_size_16_color_FFFFFF_t_70 4]

### 2.9 共享锁VS排他锁 ###

![在这里插入图片描述][20190806172017834.png]

### 2.10 锁消除 ###

![在这里插入图片描述][20190806172102326.png]

### 2.11 锁粗化 ###

![在这里插入图片描述][20190806172137977.png]

### 2.12 读写锁 ###

![在这里插入图片描述][20190806172309829.png]

### 2.13 分段锁 ###

![在这里插入图片描述][20190806172325679.png]

### 2.14 互斥锁 ###

![在这里插入图片描述][20190806172349781.png]

### 2.15 闭锁 ###

![在这里插入图片描述][20190806172415103.png]

### 2.16 死锁 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1NoZWxkb25fX0xlZQ_size_16_color_FFFFFF_t_70 5]

### 2.17 活锁 ###

![在这里插入图片描述][20190806172500939.png]

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[20190806171330941.png]: /images/20211108/ff782bdb229a4a37ac4920516ead0241.png
[20190806171427133.png]: /images/20211108/8853ec5761914e78b22d4d3896e12853.png
[20190806171513958.png]: /images/20211108/f9cb43923aec4795baeb9d18b3e4de72.png
[20190806171639173.png]: /images/20211108/ba66a438c2ce436eb3779f50ad6b4bb1.png
[20190806171738349.png]: /images/20211108/254ec2452c6142afb9448e4567c713d6.png
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[20190806172017834.png]: /images/20211108/504bc05092aa4013bf77aa05ed70e1f8.png
[20190806172102326.png]: /images/20211108/0763d55ca9e7420289dfaa74199c71eb.png
[20190806172137977.png]: /images/20211108/32b7dab8034646bca5b081017bdcc714.png
[20190806172309829.png]: /images/20211108/7e8ee965312f4e35b0b6a7a6aee3b75a.png
[20190806172325679.png]: /images/20211108/89cb421d95e54840acfda221bc338341.png
[20190806172349781.png]: /images/20211108/474482beb55a431489f065b29a4d007d.png
[20190806172415103.png]: /images/20211108/f1a2e56a328940e993c3fc84f2c14783.png
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[20190806172500939.png]: /images/20211108/44483dc6c30b48bd8b9d8371296f327f.png