mirror of
https://github.com/systemd/systemd.git
synced 2024-12-25 01:34:28 +03:00
ae2a15bc14
This macro will read a pointer of any type, return it, and set the pointer to NULL. This is useful as an explicit concept of passing ownership of a memory area between pointers. This takes inspiration from Rust: https://doc.rust-lang.org/std/option/enum.Option.html#method.take and was suggested by Alan Jenkins (@sourcejedi). It drops ~160 lines of code from our codebase, which makes me like it. Also, I think it clarifies passing of ownership, and thus helps readability a bit (at least for the initiated who know the new macro)
15 lines
160 B
Plaintext
15 lines
160 B
Plaintext
@@
|
|
local idexpression p;
|
|
expression q;
|
|
@@
|
|
- p = q;
|
|
- q = NULL;
|
|
- return p;
|
|
+ return TAKE_PTR(q);
|
|
@@
|
|
expression p, q;
|
|
@@
|
|
- p = q;
|
|
- q = NULL;
|
|
+ p = TAKE_PTR(q);
|