Re: Estimating free system resource at runtime

[Anonymouse via Digitalmars-d-learn]

On Sunday, 20 August 2017 at 15:49:09 UTC, seany wrote:
However, i cant find anything on google to tell me how to 
estimate system resource using D. for C++ and windowes, i could 
find some API-s


Can e do this in D?


You can just use those C APIs. I believe the GC does, unless I'm 
reading it wrong.


https://github.com/dlang/druntime/blob/acd2c55095ec039be2a9c20a8891ee40e4a393c3/src/gc/os.d#L173-L175
https://github.com/dlang/druntime/blob/acd2c55095ec039be2a9c20a8891ee40e4a393c3/src/core/sys/windows/winbase.d#L1383-L1392

Estimating free system resource at runtime

[seany via Digitalmars-d-learn]

Hi

I have a system that has to deal with 30+GB files. They can't be 
loaded to the amount of memory I have.


So my idea was to create a way to estimate available system RAM, 
and read a chunk from file which is 1/10 of size of available 
RAM, and process it as far as i can. If the read chunk is too 
small to meaningfully process, then i wait until resources are 
free.  If i read a chunk with some trailing things at the end 
that cant be processed, then i trim it, and reset the seek 
position.


However, i cant find anything on google to tell me how to 
estimate system resource using D. for C++ and windowes, i could 
find some API-s


Can e do this in D?