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Add support for easily declaring static inline functions

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We already had those, but they forced modules to spell out the function
bodies twice.  Eliminate some duplicates we had already grown.

Extracted from a somewhat larger patch from Andres Freund.
This commit is contained in:
Alvaro Herrera
2012-10-08 16:12:27 -03:00
parent 08c8058ce9
commit 976fa10d20
7 changed files with 59 additions and 117 deletions
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22
src/include/nodes/pg_list.h
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@@ -73,32 +73,32 @@ struct ListCell
* them as macros, since we want to avoid double-evaluation of macro
* arguments. Therefore, we implement them using static inline functions
* if supported by the compiler, or as regular functions otherwise.
* See STATIC_IF_INLINE in c.h.
*/
#ifdef USE_INLINE
static inline ListCell *
#ifndef USE_INLINE
extern ListCell *list_head(const List *l);
extern ListCell *list_tail(List *l);
extern int list_length(const List *l);
#endif /* USE_INLINE */
#if defined(USE_INLINE) || defined(PG_LIST_INCLUDE_DEFINITIONS)
STATIC_IF_INLINE ListCell *
list_head(const List *l)
{
return l ? l->head : NULL;
}
static inline ListCell *
STATIC_IF_INLINE ListCell *
list_tail(List *l)
{
return l ? l->tail : NULL;
}
static inline int
STATIC_IF_INLINE int
list_length(const List *l)
{
return l ? l->length : 0;
}
#else
extern ListCell *list_head(const List *l);
extern ListCell *list_tail(List *l);
extern int list_length(const List *l);
#endif /* USE_INLINE */
#endif /* USE_INLINE || PG_LIST_INCLUDE_DEFINITIONS */
/*
* NB: There is an unfortunate legacy from a previous incarnation of