Allocate memory pages

[LemonParty]

In Windows we have VirtualAlloc function for allocate memory pages. What is used in UNIX?

[Khrys]

mmap,  and  mprotect  is analogous to  VirtualProtect

[LemonParty]

So if I want just memory I have to pass 0 to fd and offset arguments of mmap?

[MarkMLl]

So if I want just memory I have to pass 0 to fd and offset arguments of mmap?

There's an example at https://www.freepascal.org/docs-html/current/rtl/baseunix/fpmmap.html which suggests that it's not that simple. I've not used it ** , and suggest that you look for online examples- even if (shock! Horror!!) they're written in C etc.

** I've not used it in Pascal. I've used it in some C-based video stuff, but was doing so by rote based on existing code and there is absolutely no way I'd set myself up as an expert. I believe it's covered by POSIX, so examples should be fairly portable.

MarkMLl

[LemonParty]

Seems work.

Code: Pascal  [Select][+][-]

1. Fpmmap(nil, Size, PROT_EXEC or PROT_READ or PROT_WRITE, MAP_SHARED or MAP_ANONYMOUS, -1, 0)

MAP_ANONYMOUS should be specified if no need to map to a file.