pthread锁定/解锁解决方案

我想重新实现vxWorks函数taskLock（）和taskUnlock（）。pthread锁定/解锁解决方案

这是vxWorks函数的原始描述。

* taskUnlock - enable task rescheduling 
* 
* This routine decrements the preemption lock count. Typically this call is 
* paired with taskLock() and concludes a critical section of code. 
* Preemption will not be unlocked until taskUnlock() has been called as many 
* times as taskLock(). When the lock count is decremented to zero, any tasks 
* that were eligible to preempt the current task will execute. 
* 
* The taskUnlock() routine is not callable from interrupt service routines.

我使用pthreads来重新实现vxWorks任务。那么有没有可能做到这一点？

如果我理解正确。如果函数调用taskLock，则在调用taskunlock之前不会中断以下代码。

我在网上找不到解决方案。

来源

2012-09-26 Manfred

你为什么这样做它的调度？你最终的目标是什么？ –

@MaximYegorushkin'我想重新实现vxWorks函数taskLock（）和taskUnlock（）。 '因为有一个vxwork相关的驱动程序（但这不是这篇文章的上下文） – Manfred

从v2lin Project on sourceforge.net/ taskLock评论：

taskLock - 'locks the scheduler' to prevent preemption of the current task 
      by other task-level code. Because we cannot actually lock the 
      scheduler in a pthreads environment, we temporarily set the 
      dynamic priority of the calling thread above that of any other 
      thread, thus guaranteeing that no other tasks preempt it.

因为我们不能真正锁定在并行线程环境

来源

2012-09-26 13:47:28 Manfred

pthread锁定/解锁解决方案

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