git/commit-slab-decl.h
Nguyễn Thái Ngọc Duy 878f0bb819 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>
2018-05-21 14:07:19 +09:00

43 lines
1.3 KiB
C

#ifndef COMMIT_SLAB_HDR_H
#define COMMIT_SLAB_HDR_H
/* allocate ~512kB at once, allowing for malloc overhead */
#ifndef COMMIT_SLAB_SIZE
#define COMMIT_SLAB_SIZE (512*1024-32)
#endif
#define declare_commit_slab(slabname, elemtype) \
\
struct slabname { \
unsigned slab_size; \
unsigned stride; \
unsigned slab_count; \
elemtype **slab; \
}
/*
* Statically initialize a commit slab named "var". Note that this
* evaluates "stride" multiple times! Example:
*
* struct indegree indegrees = COMMIT_SLAB_INIT(1, indegrees);
*
*/
#define COMMIT_SLAB_INIT(stride, var) { \
COMMIT_SLAB_SIZE / sizeof(**((var).slab)) / (stride), \
(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 */