diff options
Diffstat (limited to 'third_party/git/commit-slab-decl.h')
| -rw-r--r-- | third_party/git/commit-slab-decl.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/third_party/git/commit-slab-decl.h b/third_party/git/commit-slab-decl.h new file mode 100644 index 000000000000..adc7b46c83b1 --- /dev/null +++ b/third_party/git/commit-slab-decl.h @@ -0,0 +1,43 @@ +#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 */ |