一些想法：

1. 也许你叫的dlopen（）更多然后一次？ DL 库维护它在每一个的dlopen（）所以 dlclose（）增加引用计数将卸载库只如果计数器== 0。

1. Probably you call dlopen() more then once? dl library maintains reference counters which is incremented on every dlopen() so dlclose() will unload the library ONLY if counter == 0.

你指定 RTLD_NODELETE 为的dlopen标志（）（假设你是在Linux上）？如果是， dlclose（）不会卸载您的图书馆。

Did you specify RTLD_NODELETE flag for dlopen() (assuming you are on Linux)? If yes, dlclose() won't unload your library.

你有没有尝试调试系统调用与 strace的？启动Apache，认定其PID和跟踪所有系统调用的Apache没有按调用使用strace -p＆LT; PID＆GT; 。也许它会给你一些想法是怎么回事。

Did you try to debug syscalls with strace? Start Apache, finds its pid and trace all syscalls Apache doesn by calling strace -p<pid>. Probably it will give you some idea what is going on.