Add get_page_size to os module

[hk-none]

Describe the feature

Is there any way to add a function to os module to return the systems memory page size?

Use Case

Useful for low level programming

Proposed Solution

 usize(unsafe { C.syscall(C._SC_PAGESIZE) })

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

Version used

V 0.4.2 5b1b2cc

Environment details (OS name and version, etc.)

V full version: V 0.4.2 5b1b2cc
OS: macos, macOS, 14.1, 23B73
Processor: 8 cpus, 64bit, little endian, Apple M1 Pro

Git version: git version 2.39.2
Git vroot status: 4.1.18-37-ga4b4b909 (53627 commit(s) behind V master)
.git/config present: false

CC version: Apple clang version 15.0.0 (clang-1500.0.40.1)
thirdparty/tcc: N/A

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[JalonSolov]

From a stackoverflow question about this:

It is entirely platform dependent which address-ranges are mapped to which page-sizes.
Further the pagesize is not system-wide. You can allocate memory from different page-size
regions according to the use case. And you can even have platforms without any virtual
memory management.

So, code handling this topic must be platform specific.

Especially when you add Windows into the mix.

[hk-none]

Yeah, I figured from looking at go's implementation. Is this something we will add to os?