diff options
author | Lennart Poettering <lennart@poettering.net> | 2018-03-22 16:53:26 +0100 |
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committer | Sven Eden <yamakuzure@gmx.net> | 2018-08-24 16:47:08 +0200 |
commit | 0c2b96fea853ce7f16a9326c3c98117d75defdf6 (patch) | |
tree | ff3d108a1d7f295af840137e3c7f77e9d25692aa /src/basic/proc-cmdline.c | |
parent | 6895c0be1845203e14b776dd8a15a97780ac6942 (diff) |
macro: introduce TAKE_PTR() macro
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)
Diffstat (limited to 'src/basic/proc-cmdline.c')
-rw-r--r-- | src/basic/proc-cmdline.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/src/basic/proc-cmdline.c b/src/basic/proc-cmdline.c index 99d00ab0f..1d1226b28 100644 --- a/src/basic/proc-cmdline.c +++ b/src/basic/proc-cmdline.c @@ -207,10 +207,8 @@ int proc_cmdline_get_key(const char *key, unsigned flags, char **value) { } } - if (value) { - *value = ret; - ret = NULL; - } + if (value) + *value = TAKE_PTR(ret); return found; } |