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Diffstat (limited to 'random/jitterentropy-health.h')
| -rw-r--r-- | random/jitterentropy-health.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/random/jitterentropy-health.h b/random/jitterentropy-health.h new file mode 100644 index 00000000..7754629a --- /dev/null +++ b/random/jitterentropy-health.h @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2021, Stephan Mueller <smueller@chronox.de> + * + * License: see LICENSE file in root directory + * + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF + * WHICH ARE HEREBY DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE + * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + */ + +#ifndef JITTERENTROPY_HEALTH_H +#define JITTERENTROPY_HEALTH_H + +#ifdef __cplusplus +extern "C" +{ +#endif + +static inline uint64_t jent_delta(uint64_t prev, uint64_t next) +{ + return (next - prev); +} + +#ifdef JENT_HEALTH_LAG_PREDICTOR +void jent_lag_init(struct rand_data *ec, unsigned int osr); +#else /* JENT_HEALTH_LAG_PREDICTOR */ +static inline void jent_lag_init(struct rand_data *ec, unsigned int osr) +{ + (void)ec; + (void)osr; +} +#endif /* JENT_HEALTH_LAG_PREDICTOR */ + +void jent_apt_init(struct rand_data *ec, unsigned int osr); +unsigned int jent_stuck(struct rand_data *ec, uint64_t current_delta); +unsigned int jent_health_failure(struct rand_data *ec); + +#ifdef __cplusplus +} +#endif + +#endif /* JITTERENTROPY_HEALTH_H */ |