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logind: unify how we cast between uid_t and pointers for hashmap keys

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Lennart Poettering
2015-01-09 18:35:36 +01:00
parent 309a29dfd2
commit 8cb4ab0058
8 changed files with 25 additions and 13 deletions
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src/shared/macro.h
+8
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@@ -275,6 +275,14 @@ static inline unsigned long ALIGN_POWER2(unsigned long u) {
#define PTR_TO_SIZE(p) ((size_t) ((uintptr_t) (p)))
#define SIZE_TO_PTR(u) ((void *) ((uintptr_t) (u)))
/* The following macros add 1 when converting things, since UID 0 is a
* valid UID, while the pointer NULL is special */
#define PTR_TO_UID(p) ((uid_t) (((uintptr_t) (p))-1))
#define UID_TO_PTR(u) ((void*) (((uintptr_t) (u))+1))
#define PTR_TO_GID(p) ((gid_t) (((uintptr_t) (p))-1))
#define GID_TO_PTR(u) ((void*) (((uintptr_t) (u))+1))
#define memzero(x,l) (memset((x), 0, (l)))
#define zero(x) (memzero(&(x), sizeof(x)))