When compiling with VC++ 2017, Godot generates huge numbers of
C4291 warnings about missing placement delete.
I have not found a way to disable these warnings using compiler
options: AFAICT there is no equivalent to `-f-no-exceptions` for
VC++ (there is only /EH to change the exception-handling model,
/GX is deprecated) and adding /wd4291 to the
`disable_nonessential_warnings` list in the `SConstruct` file
or even compiling with `warnings=no` does not disable the
messages.
Placement delete is only called when placement new throws an
exception, since Godot doesn't use exceptions this change should
have no runtime effect.
Fixes#12654 (probably, difficult to say without log)
Plus:
- An allocation is counted only after checking its success.
- Max usage is updated after growing reallocs as well.
- Drop unused header.
- Changed the 0xFFF.. at get_mem_available() to -1 with a comment telling it's the same, but more universal.
Using a magic value for memory allocated but uninitialized and another one for memory about-to-be-released. Helps in debugging unitialized members, dangling pointerts, etc.
Disabled by default. Can be enabled for debug builds by defining `DEBUG_MEMORY_TAGGING`.
The allocation count is managed atomically and where it actually should
change (for instance, not counting an allocation before its success has
been checked).
Bonus: Improve readability of the pre-pad checks.
I can show you the code
Pretty, with proper whitespace
Tell me, coder, now when did
You last write readable code?
I can open your eyes
Make you see your bad indent
Force you to respect the style
The core devs agreed upon
A whole new world
A new fantastic code format
A de facto standard
With some sugar
Enforced with clang-format
A whole new world
A dazzling style we all dreamed of
And when we read it through
It's crystal clear
That now we're in a whole new world of code
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!
