/* SPDX-License-Identifier: GPL-2.0 */
#pragma once
#include <stdlib.h>
#include <stdbool.h>
#include <linux/err.h>
#include <errno.h>
#include <unistd.h>
#include <bpf/bpf.h>
#include <bpf/libbpf.h>
#include <math.h>
#include <time.h>
#include <sys/syscall.h>
#include <limits.h>

struct cpu_set {
        bool *cpus;
        int cpus_len;
        int next_cpu;
};

struct env {
        char *bench_name;
        int duration_sec;
        int warmup_sec;
        bool verbose;
        bool list;
        bool affinity;
        bool quiet;
        bool stacktrace;
        int consumer_cnt;
        int producer_cnt;
        int nr_cpus;
        struct cpu_set prod_cpus;
        struct cpu_set cons_cpus;
};

struct basic_stats {
        double mean;
        double stddev;
};

struct bench_res {
        long hits;
        long drops;
        long false_hits;
        long important_hits;
        unsigned long gp_ns;
        unsigned long gp_ct;
        unsigned int stime;
        unsigned long duration_ns;
};

struct bench {
        const char *name;
        const struct argp *argp;
        void (*validate)(void);
        void (*setup)(void);
        void *(*producer_thread)(void *ctx);
        void *(*consumer_thread)(void *ctx);
        void (*measure)(struct bench_res* res);
        void (*report_progress)(int iter, struct bench_res* res, long delta_ns);
        void (*report_final)(struct bench_res res[], int res_cnt);
};

struct counter {
        long value;
} __attribute__((aligned(128)));

extern struct env env;
extern const struct bench *bench;

void setup_libbpf(void);
void bench_force_done(void);
void hits_drops_report_progress(int iter, struct bench_res *res, long delta_ns);
void hits_drops_report_final(struct bench_res res[], int res_cnt);
void false_hits_report_progress(int iter, struct bench_res *res, long delta_ns);
void false_hits_report_final(struct bench_res res[], int res_cnt);
void ops_report_progress(int iter, struct bench_res *res, long delta_ns);
void ops_report_final(struct bench_res res[], int res_cnt);
void local_storage_report_progress(int iter, struct bench_res *res,
                                   long delta_ns);
void local_storage_report_final(struct bench_res res[], int res_cnt);
void grace_period_latency_basic_stats(struct bench_res res[], int res_cnt,
                                      struct basic_stats *gp_stat);
void grace_period_ticks_basic_stats(struct bench_res res[], int res_cnt,
                                    struct basic_stats *gp_stat);

static inline void atomic_inc(long *value)
{
        (void)__atomic_add_fetch(value, 1, __ATOMIC_RELAXED);
}

static inline void atomic_add(long *value, long n)
{
        (void)__atomic_add_fetch(value, n, __ATOMIC_RELAXED);
}

static inline long atomic_swap(long *value, long n)
{
        return __atomic_exchange_n(value, n, __ATOMIC_RELAXED);
}