core.c 792 B

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