Re: [Boost-users] [interprocess] Meaning of "unspecified" arguments (scoped_lock constructors)

AMDG Mark Reginald James wrote:

Hello,

I haven't been able to discover the meaning of "unspecified" in things like scoped_lock constructor parameters:

http://www.boost.org/doc/libs/1_36_0/doc/html/boost/interprocess/scoped_lock...

I'm trying to lock a scoped lock only if the mutex is not null. It looks like I need to use one of these "unspecified" constructors to assign the mutex but not lock it, so that I can then lock it in an "if" statement if the mutex is not null.

I'd be grateful for any help.

The argument you want is boost::interprocess::defer_lock, I think. It look like the doxygen/boostbook needs some tweaking here. In Christ, Steven Watanabe