Initial commit for mbed-util

[bogdanm]

mbed-util is an utilies library for mbed, its job is to provide implementations of various data structures and algorithms used in mbed. It is similar in scope to https://github.com/ARMmbed/foundation (and will likely get some components from there), but geared more towards mbed. It has a few advantages:

• some libraries can depend on mbed-util instead of mbed-core, which is a much more "lightweight" dependency
• it's not supposed to depend on mbed-core (see also the above point), which means that with the proper support code it should be usable on non-mbed platforms, for example POSIX based test environments

Initial components:

• critical section lock (implementation taken from https://github.com/ARMmbed/minar/blob/master/source/minar.cpp)
• pool allocator (implementation adapted from https://github.com/ARMmbed/system-pool)

Planned components:

• extendable pool allocator (soon to come)
• FunctionPointerX and Event (moved from mbed-core)
• generic data structures
• ...

[bogdanm]

Renamed. @autopulated, @0xc0170, please CR.

[autopulated]

looks good to me. cc @hugovincent re: the naming scheme

[bogdanm]

If there aren't serious objections to this, I'm going to merge it in order to move forward.

[0xc0170]

LGTM

[sg-]

Just wondering why this doesn't follow the mbed SDK naming convention or will that be changing?

https://developer.mbed.org/teams/SDK-Development/wiki/mbed-sdk-coding-style

[bogdanm]

It very likely means that I've missed something. Could you please point me to the place(s) that don't follow the naming convention?

[sg-]

Sorry, I was just reading comments and linked to this https://github.com/ARMmbed/foundation so the comment was more about that repo. The style here looks good!

[autopulated]

@sg- because it was written in R&D and follows the style guide we had at the time ;)