[utils] CLog: add Log and LogFunction function with additional component parameter

[Rechi]

Description

Add additional Log and LogFunction functions to the CLog class which take a component parameter. The Functions check if component logging for that component is enabled and log in that case otherwise they do nothing.

Motivation and Context

make component logging easier

How Has This Been Tested?

compiled for windows

Types of change

• Bug fix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves existing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the Code guidelines of this project
• My change requires a change to the documentation, either Doxygen or wiki
• I have updated the documentation accordingly
• I have read the CONTRIBUTING document
• I have added tests to cover my change
• All new and existing tests passed

[Montellese]

Makes sense IMO but right now it only compiles on windows.

[popcornmix]

Makes sense to me too.
One issue I have with LogF is __FUNCTION__ is not very informative. A lot of times this gives an ambiguous name like Create, Open, Close with no clues as to which component actually generated the message.

Most of the code I write uses:
CLog::Log(LOGDEBUG, "%s::%s Destroying pool", CLASSNAME, __FUNCTION__);
and I have to manually define CLASSNAME as it doesn't seem to be available from compiler.
This is a lot more useful information. I wonder if we could provide a standard way of achieving this?

It looks like gcc provides __PRETTY_FUNCTION__ (with msvc __FUNCSIG__ may be interesting, but I haven't investigated).

But __PRETTY_FUNCTION__ evaluates to something like:
MMAL::CMMALPool::CMMALPool(const char*, bool, uint32_t, uint32_t, uint32_t, MMAL::MMALState)
which is too verbose for logging, but truncating the string at the ( might give something useful.

[Rechi]

now it compiles on all platforms

[MartijnKaijser]

@Rechi https://forum.kodi.tv/showthread.php?tid=298462&pid=2633192#pid2633192