linux下消息队列的C语言封装，以及示例代码。用于进程间和线程间通信。-Provide C-language package of message queue under linux as well as sample code. This package is used for inter-process communication.

使用sem_init对共享内存的操作，使得比sem_open更加方便-Use sem_init operations on shared memory, making it more convenient than sem_open