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- #ifndef __KERN_FS_SFS_BITMAP_H__
- #define __KERN_FS_SFS_BITMAP_H__
-
- #include <defs.h>
-
-
- /*
- * Fixed-size array of bits. (Intended for storage management.)
- *
- * Functions:
- * bitmap_create - allocate a new bitmap object.
- * Returns NULL on error.
- * bitmap_getdata - return pointer to raw bit data (for I/O).
- * bitmap_alloc - locate a cleared bit, set it, and return its index.
- * bitmap_mark - set a clear bit by its index.
- * bitmap_unmark - clear a set bit by its index.
- * bitmap_isset - return whether a particular bit is set or not.
- * bitmap_destroy - destroy bitmap.
- */
-
-
- struct bitmap;
-
- struct bitmap *bitmap_create(uint32_t nbits); // allocate a new bitmap object.
- int bitmap_alloc(struct bitmap *bitmap, uint32_t *index_store); // locate a cleared bit, set it, and return its index.
- bool bitmap_test(struct bitmap *bitmap, uint32_t index); // return whether a particular bit is set or not.
- void bitmap_free(struct bitmap *bitmap, uint32_t index); // according index, set related bit to 1
- void bitmap_destroy(struct bitmap *bitmap); // free memory contains bitmap
- void *bitmap_getdata(struct bitmap *bitmap, size_t *len_store); // return pointer to raw bit data (for I/O)
-
- #endif /* !__KERN_FS_SFS_BITMAP_H__ */
-
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