If possible, just design your program never to re-lock a mutex it already has.

如果可能，在设计程序时决不要锁定一个已经锁定的互斥量。

youdao

Finally, the first thing any thread tries to do when waking up from pthread_cond_wait is re-lock the mutex it unlocked when initially called.

最后，当一个线程从调用pthread_cond_wait而被唤醒时，要做的第一件事就是重新锁定它在最初调用时解锁的那个互斥量。

youdao

None of this requires you to actually root the phone, and if you're worried about warranty you can re-lock the handset with the very same code.

本无根，需要你真正的电话，如果您对保修，您可以重新锁定与手机相同的代码非常担心。

youdao

That way, if rates rise dramatically, you can get out of your CD and re-lock at a higher.

FORBES: Use a Reverse CD Ladder to Save for Future Expenses

Known as Nexus Root Toolkit, the program can be used to easily unlock and root Nexus devices, and can also return them to stock and re-lock the bootloader.

ENGADGET: Refresh Roundup: week of July 9th, 2012 Mobile

New Jersey Governor If the polls are accurate, New Jersey Gov. Christie Todd Whitman is a lock for re-election this November.

CNN: Whitman A Favorite In New Jersey