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| author | Junio C Hamano <gitster@pobox.com> | 2018-06-25 13:22:35 -0700 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2018-06-25 13:22:35 -0700 |
| commit | b3b2aaf0fd6c65f83d5f636bb177d96c88079b13 (patch) | |
| tree | eaa7c8b7182b645e65f26278113f5d3a9e7b13a8 /commit-slab.h | |
| parent | ea27893a65cc41cad2710466aa6a58866ff22f1e (diff) | |
| parent | 9d2c97016fa09584337273ba6503e91e7c20d28e (diff) | |
| download | git-b3b2aaf0fd6c65f83d5f636bb177d96c88079b13.tar.gz | |
Merge branch 'nd/commit-util-to-slab'
The in-core "commit" object had an all-purpose "void *util" field,
which was tricky to use especially in library-ish part of the
code. All of the existing uses of the field has been migrated to a
more dedicated "commit-slab" mechanism and the field is eliminated.
* nd/commit-util-to-slab:
commit.h: delete 'util' field in struct commit
merge: use commit-slab in merge remote desc instead of commit->util
log: use commit-slab in prepare_bases() instead of commit->util
show-branch: note about its object flags usage
show-branch: use commit-slab for commit-name instead of commit->util
name-rev: use commit-slab for rev-name instead of commit->util
bisect.c: use commit-slab for commit weight instead of commit->util
revision.c: use commit-slab for show_source
sequencer.c: use commit-slab to associate todo items to commits
sequencer.c: use commit-slab to mark seen commits
shallow.c: use commit-slab for commit depth instead of commit->util
describe: use commit-slab for commit names instead of commit->util
blame: use commit-slab for blame suspects instead of commit->util
commit-slab: support shared commit-slab
commit-slab.h: code split
Diffstat (limited to 'commit-slab.h')
| -rw-r--r-- | commit-slab.h | 115 |
1 files changed, 6 insertions, 109 deletions
diff --git a/commit-slab.h b/commit-slab.h index dcaab8ca04..69bf0c807c 100644 --- a/commit-slab.h +++ b/commit-slab.h @@ -1,6 +1,9 @@ #ifndef COMMIT_SLAB_H #define COMMIT_SLAB_H +#include "commit-slab-decl.h" +#include "commit-slab-impl.h" + /* * define_commit_slab(slabname, elemtype) creates boilerplate code to define * a new struct (struct slabname) that is used to associate a piece of data @@ -41,114 +44,8 @@ * leaking memory. */ -/* allocate ~512kB at once, allowing for malloc overhead */ -#ifndef COMMIT_SLAB_SIZE -#define COMMIT_SLAB_SIZE (512*1024-32) -#endif - -#define MAYBE_UNUSED __attribute__((__unused__)) - -#define define_commit_slab(slabname, elemtype) \ - \ -struct slabname { \ - unsigned slab_size; \ - unsigned stride; \ - unsigned slab_count; \ - elemtype **slab; \ -}; \ -static int stat_ ##slabname## realloc; \ - \ -static MAYBE_UNUSED void init_ ##slabname## _with_stride(struct slabname *s, \ - unsigned stride) \ -{ \ - unsigned int elem_size; \ - if (!stride) \ - stride = 1; \ - s->stride = stride; \ - elem_size = sizeof(elemtype) * stride; \ - s->slab_size = COMMIT_SLAB_SIZE / elem_size; \ - s->slab_count = 0; \ - s->slab = NULL; \ -} \ - \ -static MAYBE_UNUSED void init_ ##slabname(struct slabname *s) \ -{ \ - init_ ##slabname## _with_stride(s, 1); \ -} \ - \ -static MAYBE_UNUSED void clear_ ##slabname(struct slabname *s) \ -{ \ - unsigned int i; \ - for (i = 0; i < s->slab_count; i++) \ - free(s->slab[i]); \ - s->slab_count = 0; \ - FREE_AND_NULL(s->slab); \ -} \ - \ -static MAYBE_UNUSED elemtype *slabname## _at_peek(struct slabname *s, \ - const struct commit *c, \ - int add_if_missing) \ -{ \ - unsigned int nth_slab, nth_slot; \ - \ - nth_slab = c->index / s->slab_size; \ - nth_slot = c->index % s->slab_size; \ - \ - if (s->slab_count <= nth_slab) { \ - unsigned int i; \ - if (!add_if_missing) \ - return NULL; \ - REALLOC_ARRAY(s->slab, nth_slab + 1); \ - stat_ ##slabname## realloc++; \ - for (i = s->slab_count; i <= nth_slab; i++) \ - s->slab[i] = NULL; \ - s->slab_count = nth_slab + 1; \ - } \ - if (!s->slab[nth_slab]) { \ - if (!add_if_missing) \ - return NULL; \ - s->slab[nth_slab] = xcalloc(s->slab_size, \ - sizeof(**s->slab) * s->stride); \ - } \ - return &s->slab[nth_slab][nth_slot * s->stride]; \ -} \ - \ -static MAYBE_UNUSED 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, \ - const struct commit *c) \ -{ \ - return slabname##_at_peek(s, c, 0); \ -} \ - \ -struct slabname - -/* - * Note that this redundant forward declaration is required - * to allow a terminating semicolon, which makes instantiations look - * like function declarations. I.e., the expansion of - * - * define_commit_slab(indegree, int); - * - * ends in 'struct indegree;'. This would otherwise - * be a syntax error according (at least) to ISO C. It's hard to - * catch because GCC silently parses it by default. - */ - -/* - * 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 define_commit_slab(slabname, elemtype) \ + declare_commit_slab(slabname, elemtype); \ + implement_static_commit_slab(slabname, elemtype) #endif /* COMMIT_SLAB_H */ |