tools/lib/perf/core.c

   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 <linux/compiler.h>
   9 #include <perf/core.h>
  10 #include <internal/lib.h>
  11 #include "internal.h"
  12
  13 static int __base_pr(enum libperf_print_level level __maybe_unused, const char *format,
  14                      va_list args)
  15 {
  16         return vfprintf(stderr, format, args);
  17 }
  18
  19 static libperf_print_fn_t __libperf_pr = __base_pr;
  20
  21 __printf(2, 3)
  22 void libperf_print(enum libperf_print_level level, const char *format, ...)
  23 {
  24         va_list args;
  25
  26         if (!__libperf_pr)
  27                 return;
  28
  29         va_start(args, format);
  30         __libperf_pr(level, format, args);
  31         va_end(args);
  32 }
  33
  34 void libperf_init(libperf_print_fn_t fn)
  35 {
  36         page_size = sysconf(_SC_PAGE_SIZE);
  37         __libperf_pr = fn;
  38 }