我怎么同步访问共享内存中的LynxOS / POSIX？ [英] How do I synchronize access to shared memory in LynxOS/POSIX?

问题描述

我实现一个的LynxOS SE （POSIX一致性）系统，该系统将通过共享通信的两个进程内存。

I am implementing two processes on a LynxOS SE (POSIX conformant) system that will communicate via shared memory.

一过程将作为一个生产者，另一个是消费者。在多线程系统我的做法，这将是使用互斥和condvar（条件变量）对，与消费者等待的condvar（与调用pthread_cond_wait ）和制作它的信号（与调用pthread_cond_signal ）时，共享内存进行更新。

One process will act as a "producer" and the other a "consumer". In a multi-threaded system my approach to this would be to use a mutex and condvar (condition variable) pair, with the consumer waiting on the condvar (with pthread_cond_wait) and the producer signalling it (with pthread_cond_signal) when the shared memory is updated.

如何在一个多进程实现这一点，而不是多线程，架构？

How do I achieve this in a multi-process, rather than multi-threaded, architecture?

有没有的LynxOS / POSIX的方式来创建一个condvar /互斥体对，可以在进程间使用吗？结果
或者是一些其他的同步机制在这种情况下更合适？

Is there a LynxOS/POSIX way to create a condvar/mutex pair that can be used between processes?
Or is some other synchronization mechanism more appropriate in this scenario?

推荐答案

标准的方法来创建一个进程共享互斥/湿。变量是你设置pthread_mutexattr_setpshared / pthread_condattr_setpshared属性初始化它们。检查LynxOS的支持。

The standard way to create a process shared mutex/cond. variable is to initialize them with an attribute where you set pthread_mutexattr_setpshared/pthread_condattr_setpshared. Check if LynxOS supports that.

您会很自然需要把这种互斥/湿。在共享内存中的变量在某种程度上，让所有进程都可以使用它。

You'll naturally need to place such mutexes/cond. variables in shared memory somehow, so all processes can use it.

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