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Re: boost mutex locks

by Rush Manbert :: Rate this Message:

On Jul 15, 2009, at 4:53 AM, mike_wilson wrote:

<snip>

> Say one thread accesses the SetMyObject() , given that there is a
> lock in
> the function, it will also lock the GetMyObject() blocking any other
> thread from calling?
>
> This kind of implies that wherever in the object there is a lock, any
> function owned by the object will be locked to any other thread
> trying to
> access. Is this correct?
>

You are correct. There is, however, a variant of mutex that allows for
multiple readers to hold the lock simultaneously, but there can only
be a single writer. All readers or other writers are locked out until
the writer releases the lock. But if you mostly read this can reduce
contention.

- Rush

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