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commit-slab: support shared commit-slab 

define_shared_commit_slab() could be used in a header file to define a
commit-slab. One of these C files must include commit-slab-impl.h and
"call" implement_shared_commit_slab().

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Nguyễn Thái Ngọc Duy 2018-05-19 07:28:18 +02:00 committed by Junio C Hamano
parent a9f1f1f9f8
commit 878f0bb819
3 changed files with 28 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
commit-slab-decl.h
View File

@ -27,4 +27,17 @@ struct slabname { \
(stride), 0, NULL \
}
#define declare_commit_slab_prototypes(slabname, elemtype) \
\
void init_ ##slabname## _with_stride(struct slabname *s, unsigned stride); \
void init_ ##slabname(struct slabname *s); \
void clear_ ##slabname(struct slabname *s); \
elemtype *slabname## _at_peek(struct slabname *s, const struct commit *c, int add_if_missing); \
elemtype *slabname## _at(struct slabname *s, const struct commit *c); \
elemtype *slabname## _peek(struct slabname *s, const struct commit *c)
#define define_shared_commit_slab(slabname, elemtype) \
declare_commit_slab(slabname, elemtype); \
declare_commit_slab_prototypes(slabname, elemtype)
#endif /* COMMIT_SLAB_HDR_H */

22
commit-slab-impl.h
View File

@ -3,11 +3,17 @@
#define MAYBE_UNUSED __attribute__((__unused__))
#define implement_commit_slab(slabname, elemtype) \
#define implement_static_commit_slab(slabname, elemtype) \
implement_commit_slab(slabname, elemtype, static MAYBE_UNUSED)
#define implement_shared_commit_slab(slabname, elemtype) \
implement_commit_slab(slabname, elemtype, )
#define implement_commit_slab(slabname, elemtype, scope) \
\
static int stat_ ##slabname## realloc; \
\
static MAYBE_UNUSED void init_ ##slabname## _with_stride(struct slabname *s, \
scope void init_ ##slabname## _with_stride(struct slabname *s, \
unsigned stride) \
{ \
unsigned int elem_size; \
@ -20,12 +26,12 @@ static MAYBE_UNUSED void init_ ##slabname## _with_stride(struct slabname *s, \
s->slab = NULL; \
} \
\
static MAYBE_UNUSED void init_ ##slabname(struct slabname *s) \
scope void init_ ##slabname(struct slabname *s) \
{ \
init_ ##slabname## _with_stride(s, 1); \
} \
\
static MAYBE_UNUSED void clear_ ##slabname(struct slabname *s) \
scope void clear_ ##slabname(struct slabname *s) \
{ \
unsigned int i; \
for (i = 0; i < s->slab_count; i++) \
@ -34,7 +40,7 @@ static MAYBE_UNUSED void clear_ ##slabname(struct slabname *s) \
FREE_AND_NULL(s->slab); \
} \
\
static MAYBE_UNUSED elemtype *slabname## _at_peek(struct slabname *s, \
scope elemtype *slabname## _at_peek(struct slabname *s, \
const struct commit *c, \
int add_if_missing) \
{ \
@ -62,13 +68,13 @@ static MAYBE_UNUSED elemtype *slabname## _at_peek(struct slabname *s, \
return &s->slab[nth_slab][nth_slot * s->stride]; \
} \
\
static MAYBE_UNUSED elemtype *slabname## _at(struct slabname *s, \
scope elemtype *slabname## _at(struct slabname *s, \
const struct commit *c) \
{ \
return slabname##_at_peek(s, c, 1); \
} \
\
static MAYBE_UNUSED elemtype *slabname## _peek(struct slabname *s, \
scope elemtype *slabname## _peek(struct slabname *s, \
const struct commit *c) \
{ \
return slabname##_at_peek(s, c, 0); \
@ -81,7 +87,7 @@ struct slabname
* to allow a terminating semicolon, which makes instantiations look
* like function declarations. I.e., the expansion of
*
* implement_commit_slab(indegree, int);
* implement_commit_slab(indegree, int, static);
*
* ends in 'struct indegree;'. This would otherwise
* be a syntax error according (at least) to ISO C. It's hard to

2
commit-slab.h
View File

@ -46,6 +46,6 @@
#define define_commit_slab(slabname, elemtype) \
declare_commit_slab(slabname, elemtype); \
implement_commit_slab(slabname, elemtype)
implement_static_commit_slab(slabname, elemtype)
#endif /* COMMIT_SLAB_H */