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+#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
+ * of elemtype to commits, and a few functions to use that struct.
+ *
+ * After including this header file, using:
+ *
+ * define_commit_slab(indegree, int);
+ *
+ * will let you call the following functions:
+ *
+ * - int *indegree_at(struct indegree *, struct commit *);
+ *
+ * This function locates the data associated with the given commit in
+ * the indegree slab, and returns the pointer to it. The location to
+ * store the data is allocated as necessary.
+ *
+ * - int *indegree_peek(struct indegree *, struct commit *);
+ *
+ * This function is similar to indegree_at(), but it will return NULL
+ * if the location to store the data associated with the given commit
+ * has not been allocated yet.
+ * Note that the location to store the data might have already been
+ * allocated even if no indegree_at() call has been made for that commit
+ * yet; in this case this function returns a pointer to a
+ * zero-initialized location.
+ *
+ * - void init_indegree(struct indegree *);
+ * void init_indegree_with_stride(struct indegree *, int);
+ *
+ * Initializes the indegree slab that associates an array of integers
+ * to each commit. 'stride' specifies how big each array is. The slab
+ * that is initialized by the variant without "_with_stride" associates
+ * each commit with an array of one integer.
+ *
+ * - void clear_indegree(struct indegree *);
+ *
+ * Empties the slab. The slab can be reused with the same stride
+ * without calling init_indegree() again or can be reconfigured to a
+ * different stride by calling init_indegree_with_stride().
+ *
+ * Call this function before the slab falls out of scope to avoid
+ * leaking memory.
+ *
+ * - void deep_clear_indegree(struct indegree *, void (*free_fn)(int*))
+ *
+ * Empties the slab, similar to clear_indegree(), but in addition it
+ * calls the given 'free_fn' for each slab entry to release any
+ * additional memory that might be owned by the entry (but not the
+ * entry itself!).
+ * Note that 'free_fn' might be called even for entries for which no
+ * indegree_at() call has been made; in this case 'free_fn' is invoked
+ * with a pointer to a zero-initialized location.
+ */
+
+#define define_commit_slab(slabname, elemtype) \
+ declare_commit_slab(slabname, elemtype); \
+ implement_static_commit_slab(slabname, elemtype)
+
+#endif /* COMMIT_SLAB_H */