How to memory map a file in Common Lisp on Linux?

Question

How can I achieve memory mapping in Common Lisp either through cffi or a custom library?

There is void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset); in C language.

Duplicate? https://stackoverflow.com/questions/27451190/how-do-i-memory-map-tmpfs-files-in-sbcl SBCL has a `mmap` in `sb-posix`. — Ehvince, Nov 16 '19 at 13:41

score 6 · Accepted Answer · answered Nov 16 '19 at 21:55

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There is already How do I memory map tmpfs files in sbcl?, but nowadays there is a portable library for that: just (ql:quickload "mmap").

The repository is here.

answered Nov 16 '19 at 21:55

Svante

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score 1 · Answer 2 · answered Nov 20 '19 at 09:01

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Some implementations let you specify in a call to function open take the file should be memory-mapped. At least Allegro CL supports (open .. :mapped t). This also works in macro with-open-file which expands into open.

answered Nov 20 '19 at 09:01

zut

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How to memory map a file in Common Lisp on Linux?

2 Answers2