74 lines
2.7 KiB
C
74 lines
2.7 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* tools/testing/selftests/kvm/include/sparsebit.h
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*
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* Copyright (C) 2018, Google LLC.
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*
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* Header file that describes API to the sparsebit library.
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* This library provides a memory efficient means of storing
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* the settings of bits indexed via a uint64_t. Memory usage
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* is reasonable, significantly less than (2^64 / 8) bytes, as
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* long as bits that are mostly set or mostly cleared are close
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* to each other. This library is efficient in memory usage
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* even in the case where most bits are set.
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*/
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#ifndef SELFTEST_KVM_SPARSEBIT_H
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#define SELFTEST_KVM_SPARSEBIT_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct sparsebit;
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typedef uint64_t sparsebit_idx_t;
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typedef uint64_t sparsebit_num_t;
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struct sparsebit *sparsebit_alloc(void);
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void sparsebit_free(struct sparsebit **sbitp);
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void sparsebit_copy(struct sparsebit *dstp, struct sparsebit *src);
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bool sparsebit_is_set(struct sparsebit *sbit, sparsebit_idx_t idx);
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bool sparsebit_is_set_num(struct sparsebit *sbit,
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sparsebit_idx_t idx, sparsebit_num_t num);
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bool sparsebit_is_clear(struct sparsebit *sbit, sparsebit_idx_t idx);
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bool sparsebit_is_clear_num(struct sparsebit *sbit,
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sparsebit_idx_t idx, sparsebit_num_t num);
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sparsebit_num_t sparsebit_num_set(struct sparsebit *sbit);
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bool sparsebit_any_set(struct sparsebit *sbit);
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bool sparsebit_any_clear(struct sparsebit *sbit);
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bool sparsebit_all_set(struct sparsebit *sbit);
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bool sparsebit_all_clear(struct sparsebit *sbit);
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sparsebit_idx_t sparsebit_first_set(struct sparsebit *sbit);
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sparsebit_idx_t sparsebit_first_clear(struct sparsebit *sbit);
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sparsebit_idx_t sparsebit_next_set(struct sparsebit *sbit, sparsebit_idx_t prev);
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sparsebit_idx_t sparsebit_next_clear(struct sparsebit *sbit, sparsebit_idx_t prev);
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sparsebit_idx_t sparsebit_next_set_num(struct sparsebit *sbit,
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sparsebit_idx_t start, sparsebit_num_t num);
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sparsebit_idx_t sparsebit_next_clear_num(struct sparsebit *sbit,
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sparsebit_idx_t start, sparsebit_num_t num);
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void sparsebit_set(struct sparsebit *sbitp, sparsebit_idx_t idx);
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void sparsebit_set_num(struct sparsebit *sbitp, sparsebit_idx_t start,
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sparsebit_num_t num);
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void sparsebit_set_all(struct sparsebit *sbitp);
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void sparsebit_clear(struct sparsebit *sbitp, sparsebit_idx_t idx);
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void sparsebit_clear_num(struct sparsebit *sbitp,
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sparsebit_idx_t start, sparsebit_num_t num);
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void sparsebit_clear_all(struct sparsebit *sbitp);
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void sparsebit_dump(FILE *stream, struct sparsebit *sbit,
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unsigned int indent);
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void sparsebit_validate_internal(struct sparsebit *sbit);
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#ifdef __cplusplus
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}
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#endif
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#endif /* SELFTEST_KVM_SPARSEBIT_H */
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