Re: [boost] [interprocess] locked mutex and process killed

Subject: Re: [boost] [interprocess] locked mutex and process killed
From: Vicente Botet Escriba (vicente.botet_at_[hidden])
Date: 2009-03-24 13:34:58

Edouard A. wrote:
> 
> On Tue, 24 Mar 2009 09:39:08 -0700 (PDT), Vicente Botet Escriba
> <vicente.botet_at_[hidden]> wrote:
> 
>> if this is the case, what do you think about adding a kind of resource
>> manager that will ensure all the shared resources are released (and in
>> particular the interprocess::mutex are unlocked) on a cleanup phase just
>> before diing?
> 
> Hi Vicente,
> 
> If the process is killed by the operating system (or the user with
> SIGKILL/TerminateProcess) there is nothing you can do before dying
> (otherwise that means you could make a process immortal). 
> 
> For mutexes they will be unlocked when leaving the scope of your function,
> so if you have some sort of exception translator you should be on the safe
> side even for division by zero, bad memory access and the like (in Windows
> I'm thinking about _set_se_translator). A lot of low memory errors will
> also be caught thanks to std::bad_alloc.
> 
> For other resources it may make sense to register a clean up function with
> atexit.
> 
> Kind regards.
> 
> -- 
> 
> EA
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> 

How the mutex will be unlocked when leaving the scope of the function?

Vicente
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