To work around this omission, I use the POSIX condition variable emulations synchronization primitives, which are outlined in the series of articles.
为解决此缺憾，我使用POSIX条件变量模拟同步原语，并在一系列文章中对此进行了概述。
2
While the target variable is guaranteed to be only assigned once, the delegate may be called by multiple concurrent threads unless a synchronization object is passed in.
这保证了目标变量只会设置一次。不过，如果没有使用同步对象的话，委托可能会被几个并发线程调用多次。
3
When more than one thread accesses a mutable variable, all threads must use synchronization, or else some very bad things can happen.