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Mutex Emergization - (UNIX)
原标题:Mutex Initialization -(UNIX)

在以下法典中。 Aex 启动。 重要的是NUL

pthread_mutex_init(&a->monitor,NULL);

我想知道,我们为什么把联合国利比里亚特派团作为第二个参数。

最佳回答

第二个论点是<条码>pread_mutexattr_t 结构的一个要点,它使你 t清了该校方的行为。

多数互换选择只在对冲情况下(避免出现优先权转移的僵局,在程序而不是对面之间分享权差)才有用,而更为有益的选择(例如,再入侵控制)在2008年修订《规则》时只是标准化的,这意味着你可以依赖其存在交叉面貌。 paxdiablo的回答有一个全面的清单。

问题回答

NUL, as a mutex mandatee, given Yous an implementation defined Objecte. 如果你想要知道你可以做什么,请查阅following reference,并遵循pthread_mutexattr_*。 http://code>SEE ALSO。

这是标准问题7,1003.1-2008。 http://www. opengroup.org/onlinepubs/9699919799/“rel=“nofollow noreferer”>。 在底层左边的<代码>Headers 上进行扫描,使您能够浏览具体功能(包括<代码>pthreads.h)。

属性使你能够确定或取得:

  • the type (deadlocking, deadlock-detecting, recursive, etc).
  • the robustness (what happens when you acquire a mutex and the original owner died while possessing it).
  • the process-shared attribute (for sharing a mutex across process boundaries).
  • the protocol (how a thread behaves in terms of priority when a higher-priority thread wants the mutex).
  • the priority ceiling (the priority at which the critical section will run, a way of preventing priority inversion).

当然,还有init和销毁电话,与具体特性没有直接关系,但用于制造。

The second argument of pthread_mutex_init takes the pthread_mutexattr_t as argument. You can use the second argument to specify the attributes to the mutex and if its NULL default mutex attributes are used.





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