CODEWITHSUNDEEP
clinuxportinghp-uxmemory-locking
atu0830
atu0830

Reputation: 405

How to use plock(HPUX) on Linux

I am porting a HP-UX program to Linux. There IS

plock(PROCLOCK);

Should I use mlock() to instead of it?

Also the original code did not call plock(UNLOCK), not sure why, but I should add munlock()?

Upvotes: 1

Views: 336

Answers (1)

Jonathon Reinhart
Jonathon Reinhart

Reputation: 137398

The SunOS 5.10 man page for plock(3C) says:

USAGE

The mlock(3C) and mlockall(3C) functions are the preferred interfaces for process locking.

Considering plock is not available in Linux, yes mlock is the correct alternative.

The Linux man page for mlock() says:

Memory locking has two main applications: real-time algorithms and high-security data processing.

If your application falls under one of those two categories, then I would say yes, it makes sense to call mlock(). I can't think of any reason you would call munlock, but your specific program requirements may be different.

The man page has further guidance on how exactly you should call it to attain the desired results. Without knowing what your program does, or why the original author decided to call plock, that's the best advice I can give.

Upvotes: 2

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