#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
* 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 */