互斥在共享内存时一个用户崩溃？ [英] Mutex in shared memory when one user crashes?

问题描述

假设一个进程创建共享内存中的互斥和锁定它，而互斥被锁定转储核心。

Suppose that a process is creating a mutex in shared memory and locking it and dumps core while the mutex is locked.

现在在另一个进程中，我怎样检测的互斥锁已经锁定，但没有任何进程拥有？

Now in another process how do I detect that mutex is already locked but not owned by any process?

推荐答案

如果使用Linux或类似的东西，可考虑使用的命名信号的，而不是（我假设是什么）pthreads的互斥。我不认为有一种方法来确定一个pthreads的互斥的锁定PID，短构建自己的报名表，并把它在共享内存。

If you're working in Linux or something similar, consider using named semaphores instead of (what I assume are) pthreads mutexes. I don't think there is a way to determine the locking PID of a pthreads mutex, short of building your own registration table and also putting it in shared memory.

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