/* Bitmap abstract data type. */
-/* Element type.
-
- This must be an unsigned integer type at least as wide as int.
-
- Each bit represents one bit in the bitmap.
- If bit 0 in an element represents bit K in the bitmap,
- then bit 1 in the element represents bit K+1 in the bitmap,
- and so on. */
-typedef unsigned long elem_type;
-
-/* From the outside, a bitmap is an array of bits. From the
- inside, it's an array of elem_type (defined above) that
- simulates an array of bits. */
-struct bitmap
- {
- size_t bit_cnt; /* Number of bits. */
- elem_type *bits; /* Elements that represent bits. */
- };
-
-bool bitmap_init (struct bitmap *, size_t bit_cnt);
+struct bitmap *bitmap_create (size_t bit_cnt);
void bitmap_destroy (struct bitmap *);
size_t bitmap_size (const struct bitmap *);
void bitmap_set (struct bitmap *, size_t idx, bool);
void bitmap_set_all (struct bitmap *, bool);
+void bitmap_set_multiple (struct bitmap *, size_t start, size_t end, bool);
void bitmap_mark (struct bitmap *, size_t idx);
void bitmap_reset (struct bitmap *, size_t idx);
bool bitmap_test (const struct bitmap *, size_t idx);
#define BITMAP_ERROR ((size_t) -1)
-size_t bitmap_scan (const struct bitmap *, bool);
-size_t bitmap_find_and_set (struct bitmap *);
-size_t bitmap_find_and_clear (struct bitmap *);
+size_t bitmap_scan (const struct bitmap *, size_t start, size_t cnt, bool);
+size_t bitmap_scan_and_flip (struct bitmap *, size_t start, size_t cnt,
+ bool);
-size_t bitmap_set_cnt (const struct bitmap *);
-bool bitmap_clear_cnt (const struct bitmap *);
-
-bool bitmap_any (const struct bitmap *);
-bool bitmap_none (const struct bitmap *);
-bool bitmap_all (const struct bitmap *);
+size_t bitmap_count (const struct bitmap *, size_t start, size_t end, bool);
+bool bitmap_any (const struct bitmap *, size_t start, size_t end);
+bool bitmap_none (const struct bitmap *, size_t start, size_t end);
+bool bitmap_all (const struct bitmap *, size_t start, size_t end);
#ifdef FILESYS
struct file;
void bitmap_dump (const struct bitmap *);
+size_t bitmap_needed_bytes (size_t bit_cnt);
+struct bitmap *bitmap_create_preallocated (size_t bit_cnt,
+ void *, size_t byte_cnt);
+
#endif /* lib/kernel/bitmap.h */