#ifndef PERFCOUNTERS_H
#define PERFCOUNTERS_H

#include <stdint.h>

#include "../../litmus-rt/include/linux/perf_event.h"

#define NR_PERF_COUNTERS	4

/*
 * Retain this information with a performance counter file descriptor.
 */
struct perf_counter {
	int			fd;
	enum perf_type_id	type;
	uint64_t		config;
};


/*
 * Initialize a set of counters for a CPU.
 *
 * This is NOT thread safe!
 *
 * @cpu			CPU
 * @group_leader	group leader PID or -1 make a new group
 * @perf_counter	array
 * @return		0 or error
 */
int setup_cpu_perf(const int, const int, struct perf_counter*);

const char* get_perf_name(const struct perf_counter*);

int read_perf_counter(const struct perf_counter*, uint64_t*);

#endif