LXR linux/tools/perf/util/evswitch.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2// Copyright (C) 2019, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
   3
   4#include "evswitch.h"
   5#include "evlist.h"
   6
   7bool evswitch__discard(struct evswitch *evswitch, struct evsel *evsel)
   8{
   9        if (evswitch->on && evswitch->discarding) {
  10                if (evswitch->on != evsel)
  11                        return true;
  12
  13                evswitch->discarding = false;
  14
  15                if (!evswitch->show_on_off_events)
  16                        return true;
  17
  18                return false;
  19        }
  20
  21        if (evswitch->off && !evswitch->discarding) {
  22                if (evswitch->off != evsel)
  23                        return false;
  24
  25                evswitch->discarding = true;
  26
  27                if (!evswitch->show_on_off_events)
  28                        return true;
  29        }
  30
  31        return false;
  32}
  33
  34static int evswitch__fprintf_enoent(FILE *fp, const char *evtype, const char *evname)
  35{
  36        int printed = fprintf(fp, "ERROR: switch-%s event not found (%s)\n", evtype, evname);
  37
  38        return printed += fprintf(fp, "HINT:  use 'perf evlist' to see the available event names\n");
  39}
  40
  41int evswitch__init(struct evswitch *evswitch, struct evlist *evlist, FILE *fp)
  42{
  43        if (evswitch->on_name) {
  44                evswitch->on = evlist__find_evsel_by_str(evlist, evswitch->on_name);
  45                if (evswitch->on == NULL) {
  46                        evswitch__fprintf_enoent(fp, "on", evswitch->on_name);
  47                        return -ENOENT;
  48                }
  49                evswitch->discarding = true;
  50        }
  51
  52        if (evswitch->off_name) {
  53                evswitch->off = evlist__find_evsel_by_str(evlist, evswitch->off_name);
  54                if (evswitch->off == NULL) {
  55                        evswitch__fprintf_enoent(fp, "off", evswitch->off_name);
  56                        return -ENOENT;
  57                }
  58        }
  59
  60        return 0;
  61}
  62