[omniORB] omni_mutex::trylock

[Luke Deller]

Hello,

Here's a patch to add a non-blocking "trylock" method to the omni_mutex
class in the omnithread library.  Would something like this be a
useful addition to the omnithread code base?

See that I added the relevant mapping to a native thread library call
in nt.h, posix.h and VxThread.h.  The last of these is untested.

The other implementations (mach.h, pthread_nt.h and solaris.h) appear
to be currently broken due to missing a definition of
OMNI_MUTEX_LOCK_IMPLEMENTATION, so I did not bother with them.

Kind regards,
Luke.

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