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commit-slab: support shared commit-slab

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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
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22
commit-slab-impl.h
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@ -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