初稿，还在继续学习源码中…
代码目录结构
.
├── Contributing
├── LICENSE
├── Makefile
├── README
├── adm ( 做成系统服务相关配置 )
├── ct （测试用例代码）
├── doc （文档）
├── pkg （文档）重要代码
- tube
- heap
- job
用两个数据结构描述job。（1）jobrec，job的描述信息，元数据；（2）job，job内容的实际存储
struct job {
Jobrec r; // persistent fields; these get written to the wal //描述job的属性，持久化时这些数据会写到文件中。
/* bookeeping fields; these are in-memory only */
char pad[6];
tube tube; // 指针，指向一个tube
job prev, next; /* linked list of jobs */
job ht_next; /* Next job in a hash table list */
size_t heap_index; /* where is this job in its current heap */
File *file;
job fnext;
job fprev;
void *reserver;
int walresv;
int walused;
char body[]; // written separately to the wal
};- ms
自定义的集合类型，在此项目中用来管理连接、tube。 - all_jobs_init
哈希表，存储job,按照job id取模来进行哈希。该哈希表用于快速查找job。
job状态迁移
put with delay release with delay
----------------> [DELAYED] <------------.
| |
| (time passes) |
| |
put v reserve | delete
-----------------> [READY] ---------> [RESERVED] --------> *poof*
^ ^ | |
| \ release | |
| `-------------' |
| |
| kick |
| |
| bury |
[BURIED] <---------------'
|
| delete
`--------> *poof*