[thirdparty/git.git] / commit-slab-decl.h

#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 \
}

#endif /* COMMIT_SLAB_HDR_H */
Commit	Line	Data
a9f1f1f9 NTND	1	#ifndef COMMIT_SLAB_HDR_H
	2	#define COMMIT_SLAB_HDR_H
	3
	4	/* allocate ~512kB at once, allowing for malloc overhead */
	5	#ifndef COMMIT_SLAB_SIZE
	6	#define COMMIT_SLAB_SIZE (512*1024-32)
	7	#endif
	8
	9	#define declare_commit_slab(slabname, elemtype) \
	10	\
	11	struct slabname { \
	12	unsigned slab_size; \
	13	unsigned stride; \
	14	unsigned slab_count; \
	15	elemtype **slab; \
	16	}
	17
	18	/*
	19	* Statically initialize a commit slab named "var". Note that this
	20	* evaluates "stride" multiple times! Example:
	21	*
	22	* struct indegree indegrees = COMMIT_SLAB_INIT(1, indegrees);
	23	*
	24	*/
	25	#define COMMIT_SLAB_INIT(stride, var) { \
	26	COMMIT_SLAB_SIZE / sizeof(**((var).slab)) / (stride), \
	27	(stride), 0, NULL \
	28	}
	29
	30	#endif /* COMMIT_SLAB_HDR_H */