#pragma once

#include <cstdint>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <cstdio>
#include <sys/types.h>
#include <sys/cpuset.h>

#define DISALLOW_EVIL_CONSTRUCTORS(TypeName) \
	TypeName(const TypeName &) = delete; \
	void operator=(const TypeName &) = delete

#define UNUSED __attribute__((unused))

constexpr static unsigned long S2NS = 1000000000UL;
constexpr static unsigned long S2US = 1000000UL;
constexpr static unsigned long MS2NS = 1000000UL;

constexpr static int NEXT_CPU_NULL = -1;


#if defined(__x86_64__)
static inline int
cmask_get_next_cpu(uint64_t *mask)
{
	int ffs = ffsll(*mask);
	*mask &= ~(1ul << (ffs - 1));
	return ffs - 1;
}

static inline int
cmask_get_num_cpus(const uint64_t mask)
{
	return __builtin_popcount(mask);
}
#endif

static inline uint64_t
get_uptime()
{
	struct timespec tp;
	clock_gettime(CLOCK_MONOTONIC, &tp);
    return (tp.tv_sec * S2NS + tp.tv_nsec);
}

static inline void
cpulist_to_cpuset(char * cpulist, cpuset_t * cpuset)
{
	char * cpu = strtok(cpulist, ",");
	CPU_ZERO(cpuset);

	while (cpu != nullptr) {
		CPU_SET(atoi(cpu), cpuset);
		cpu = strtok(nullptr, ",");
	}
}

#define ATTR_UNUSED __attribute__((unused))