52 lines
1.8 KiB
C
Executable File
52 lines
1.8 KiB
C
Executable File
#ifndef __LIB_KERNEL_BITMAP_H
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#define __LIB_KERNEL_BITMAP_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <inttypes.h>
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/* Bitmap abstract data type. */
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/* Creation and destruction. */
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struct bitmap *bitmap_create (size_t bit_cnt);
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struct bitmap *bitmap_create_in_buf (size_t bit_cnt, void *, size_t byte_cnt);
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size_t bitmap_buf_size (size_t bit_cnt);
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void bitmap_destroy (struct bitmap *);
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/* Bitmap size. */
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size_t bitmap_size (const struct bitmap *);
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/* Setting and testing single bits. */
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void bitmap_set (struct bitmap *, size_t idx, bool);
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void bitmap_mark (struct bitmap *, size_t idx);
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void bitmap_reset (struct bitmap *, size_t idx);
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void bitmap_flip (struct bitmap *, size_t idx);
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bool bitmap_test (const struct bitmap *, size_t idx);
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/* Setting and testing multiple bits. */
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void bitmap_set_all (struct bitmap *, bool);
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void bitmap_set_multiple (struct bitmap *, size_t start, size_t cnt, bool);
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size_t bitmap_count (const struct bitmap *, size_t start, size_t cnt, bool);
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bool bitmap_contains (const struct bitmap *, size_t start, size_t cnt, bool);
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bool bitmap_any (const struct bitmap *, size_t start, size_t cnt);
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bool bitmap_none (const struct bitmap *, size_t start, size_t cnt);
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bool bitmap_all (const struct bitmap *, size_t start, size_t cnt);
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/* Finding set or unset bits. */
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#define BITMAP_ERROR SIZE_MAX
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size_t bitmap_scan (const struct bitmap *, size_t start, size_t cnt, bool);
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size_t bitmap_scan_and_flip (struct bitmap *, size_t start, size_t cnt, bool);
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/* File input and output. */
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#ifdef FILESYS
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struct file;
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size_t bitmap_file_size (const struct bitmap *);
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bool bitmap_read (struct bitmap *, struct file *);
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bool bitmap_write (const struct bitmap *, struct file *);
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#endif
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/* Debugging. */
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void bitmap_dump (const struct bitmap *);
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#endif /* lib/kernel/bitmap.h */
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