#ifndef TASK01_ISR_SEMAPHORE_MODEL_H
#define TASK01_ISR_SEMAPHORE_MODEL_H

#include <stddef.h>
#include <stdint.h>

typedef struct IsrEvidence
{
    uint32_t sequence;
    uint32_t event;
    uint32_t tick;
    uint32_t actor;
    uint32_t value;
    uint32_t committed;
} IsrEvidence;

static inline int fc07_order_is_valid( const IsrEvidence * events,
                                       size_t count )
{
    size_t index;
    if( count != 9U )
    {
        return 0;
    }
    for( index = 0U; index < count; ++index )
    {
        if( events[ index ].sequence != index + 1U ||
            events[ index ].event != index + 1U ||
            events[ index ].committed !=
                ( 0xFC070000U | ( uint32_t ) ( index + 1U ) ) )
        {
            return 0;
        }
    }
    return 1;
}

static inline uint32_t fc07_digest( const IsrEvidence * events,
                                     size_t count )
{
    uint32_t hash = 2166136261U;
    size_t index;
    for( index = 0U; index < count; ++index )
    {
        hash = ( hash ^ events[ index ].event ) * 16777619U;
        hash = ( hash ^ events[ index ].actor ) * 16777619U;
        hash = ( hash ^ events[ index ].value ) * 16777619U;
        hash = ( hash ^ events[ index ].committed ) * 16777619U;
    }
    return hash;
}
#endif