Re: [Boost-users] [boost::interprocess] Do I need to use lock before allocate shared memory?

Subject: Re: [Boost-users] [boost::interprocess] Do I need to use lock before allocate shared memory?
From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2009-12-21 02:55:51

El 19/12/2009 16:04, blp330 escribió:
>
> Hi,
>
> Do I need to use lock before allocate shared memory?
>
> I have two processes that will allocate string to the same shared memory, do
> I need to use lock?

No, you don't need a lock when allocating raw memory 
("managed_shared_memory.allocated()") or constructing objects 
("managed_shared_memory.construct<>"). Once constructed, if two threads 
use the same objects, you will need to use a lock, just like a 
std::vector shared by two threads.

Best,

Ion