44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
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#ifndef COMMIT_SLAB_HDR_H
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#define COMMIT_SLAB_HDR_H
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/* allocate ~512kB at once, allowing for malloc overhead */
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#ifndef COMMIT_SLAB_SIZE
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#define COMMIT_SLAB_SIZE (512*1024-32)
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#endif
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#define declare_commit_slab(slabname, elemtype) \
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\
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struct slabname { \
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unsigned slab_size; \
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unsigned stride; \
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unsigned slab_count; \
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elemtype **slab; \
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}
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/*
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* Statically initialize a commit slab named "var". Note that this
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* evaluates "stride" multiple times! Example:
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*
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* struct indegree indegrees = COMMIT_SLAB_INIT(1, indegrees);
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*
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*/
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#define COMMIT_SLAB_INIT(stride, var) { \
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COMMIT_SLAB_SIZE / sizeof(**((var).slab)) / (stride), \
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(stride), 0, NULL \
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}
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#define declare_commit_slab_prototypes(slabname, elemtype) \
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\
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void init_ ##slabname## _with_stride(struct slabname *s, unsigned stride); \
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void init_ ##slabname(struct slabname *s); \
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void clear_ ##slabname(struct slabname *s); \
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elemtype *slabname## _at_peek(struct slabname *s, const struct commit *c, int add_if_missing); \
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elemtype *slabname## _at(struct slabname *s, const struct commit *c); \
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elemtype *slabname## _peek(struct slabname *s, const struct commit *c)
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#define define_shared_commit_slab(slabname, elemtype) \
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declare_commit_slab(slabname, elemtype); \
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declare_commit_slab_prototypes(slabname, elemtype)
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#endif /* COMMIT_SLAB_HDR_H */
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