tools/tracing/rtla/src/utils.h

// SPDX-License-Identifier: GPL-2.0

#include <stdint.h>
#include <string.h>
#include <time.h>
#include <sched.h>
#include <stdbool.h>
#include <stdlib.h>

#include <linux/container_of.h>

/*
 * '18446744073709551615\0'
 */
#define BUFF_U64_STR_SIZE	24
#define MAX_PATH		1024
#define MAX_NICE		20
#define MIN_NICE		-19

#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
#endif

/* Calculate string length at compile time (excluding null terminator) */
#define STRING_LENGTH(s) (ARRAY_SIZE(s) - sizeof(*(s)))

/* Compare string with static string, length determined at compile time */
#define strncmp_static(s1, s2) strncmp(s1, s2, ARRAY_SIZE(s2))

/**
 * str_has_prefix - Test if a string has a given prefix
 * @str: The string to test
 * @prefix: The string to see if @str starts with
 *
 * Returns: true if @str starts with @prefix, false otherwise
 */
static inline bool str_has_prefix(const char *str, const char *prefix)
{
	return strncmp(str, prefix, strlen(prefix)) == 0;
}

extern bool config_debug;
void debug_msg(const char *fmt, ...);
void err_msg(const char *fmt, ...);
void fatal(const char *fmt, ...);

long parse_seconds_duration(char *val);
void get_duration(time_t start_time, char *output, int output_size);

long long get_llong_from_str(char *start);

static inline void
update_min(unsigned long long *a, unsigned long long *b)
{
	if (*a > *b)
		*a = *b;
}

static inline void
update_max(unsigned long long *a, unsigned long long *b)
{
	if (*a < *b)
		*a = *b;
}

static inline void
update_sum(unsigned long long *a, unsigned long long *b)
{
	*a += *b;
}

#ifndef SCHED_ATTR_SIZE_VER0
struct sched_attr {
	uint32_t size;
	uint32_t sched_policy;
	uint64_t sched_flags;
	int32_t sched_nice;
	uint32_t sched_priority;
	uint64_t sched_runtime;
	uint64_t sched_deadline;
	uint64_t sched_period;
};
#endif /* SCHED_ATTR_SIZE_VER0 */

enum stack_format {
	STACK_FORMAT_TRUNCATE,
	STACK_FORMAT_SKIP,
	STACK_FORMAT_FULL
};

int parse_prio(char *arg, struct sched_attr *sched_param);
int parse_cpu_set(char *cpu_list, cpu_set_t *set);
int parse_stack_format(char *arg);
int __set_sched_attr(int pid, struct sched_attr *attr);
int set_comm_sched_attr(const char *comm_prefix, struct sched_attr *attr);
int set_comm_cgroup(const char *comm_prefix, const char *cgroup);
int set_pid_cgroup(pid_t pid, const char *cgroup);
int set_cpu_dma_latency(int32_t latency);
void *calloc_fatal(size_t n, size_t size);
void *reallocarray_fatal(void *p, size_t n, size_t size);
char *strdup_fatal(const char *s);
#ifdef HAVE_LIBCPUPOWER_SUPPORT
int save_cpu_idle_disable_state(unsigned int cpu);
int restore_cpu_idle_disable_state(unsigned int cpu);
void free_cpu_idle_disable_states(void);
int set_deepest_cpu_idle_state(unsigned int cpu, unsigned int state);
static inline int have_libcpupower_support(void) { return 1; }
#else
static inline int save_cpu_idle_disable_state(unsigned int cpu) { return -1; }
static inline int restore_cpu_idle_disable_state(unsigned int cpu) { return -1; }
static inline void free_cpu_idle_disable_states(void) { }
static inline int set_deepest_cpu_idle_state(unsigned int cpu, unsigned int state) { return -1; }
static inline int have_libcpupower_support(void) { return 0; }
#endif /* HAVE_LIBCPUPOWER_SUPPORT */
int auto_house_keeping(cpu_set_t *monitored_cpus);
__attribute__((__warn_unused_result__)) int strtoi(const char *s, int *res);

#define ns_to_usf(x) (((double)x/1000))
#define ns_to_per(total, part) ((part * 100) / (double)total)

enum result {
	PASSED	= EXIT_SUCCESS,
	ERROR	= EXIT_FAILURE,
	FAILED, /* test hit the stop tracing condition */
};