1// SPDX-License-Identifier: GPL-2.0-only
 2
 3#define __printf(a, b)  __attribute__((format(printf, a, b)))
 4
 5#include <stdio.h>
 6#include <stdarg.h>
 7#include <unistd.h>
 8#include <perf/core.h>
 9#include <internal/lib.h>
10#include "internal.h"
11
12static int __base_pr(enum libperf_print_level level, const char *format,
13		     va_list args)
14{
15	return vfprintf(stderr, format, args);
16}
17
18static libperf_print_fn_t __libperf_pr = __base_pr;
19
20__printf(2, 3)
21void libperf_print(enum libperf_print_level level, const char *format, ...)
22{
23	va_list args;
24
25	if (!__libperf_pr)
26		return;
27
28	va_start(args, format);
29	__libperf_pr(level, format, args);
30	va_end(args);
31}
32
33void libperf_init(libperf_print_fn_t fn)
34{
35	page_size = sysconf(_SC_PAGE_SIZE);
36	__libperf_pr = fn;
37}