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Date: Mon, 12 Oct 2020 12:05:01 +0300 From: Alexey Budankov <alexey.budankov@...ux.intel.com> To: Arnaldo Carvalho de Melo <acme@...nel.org>, Jiri Olsa <jolsa@...hat.com> Cc: Namhyung Kim <namhyung@...nel.org>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Andi Kleen <ak@...ux.intel.com>, Adrian Hunter <adrian.hunter@...el.com>, Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, linux-kernel <linux-kernel@...r.kernel.org> Subject: [PATCH v1 11/15] perf evlist: introduce evlist__ctlfd_update() to update ctl fd status Introduce evlist__ctlfd_update() to update ctl fd poll status in evlist pollfd array using other pollfd object. Signed-off-by: Alexey Budankov <alexey.budankov@...ux.intel.com> --- tools/perf/util/evlist.c | 16 ++++++++++++++++ tools/perf/util/evlist.h | 1 + 2 files changed, 17 insertions(+) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index 8bdf3d2c907c..758a4896fedd 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -1970,6 +1970,22 @@ int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd) return err; } +int evlist__ctlfd_update(struct evlist *evlist, struct pollfd *update) +{ + int ctlfd_pos = evlist->ctl_fd.pos; + struct pollfd *entries = evlist->core.pollfd.entries; + + if (!evlist__ctlfd_initialized(evlist)) + return 0; + + if (entries[ctlfd_pos].fd != update->fd || + entries[ctlfd_pos].events != update->events) + return -1; + + entries[ctlfd_pos].revents = update->revents; + return 0; +} + struct evsel *evlist__find_evsel(struct evlist *evlist, int idx) { struct evsel *evsel; diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index e1a450322bc5..9b73d6ccf066 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -380,6 +380,7 @@ void evlist__close_control(int ctl_fd, int ctl_fd_ack, bool *ctl_fd_close); int evlist__initialize_ctlfd(struct evlist *evlist, int ctl_fd, int ctl_fd_ack); int evlist__finalize_ctlfd(struct evlist *evlist); bool evlist__ctlfd_initialized(struct evlist *evlist); +int evlist__ctlfd_update(struct evlist *evlist, struct pollfd *update); int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd); int evlist__ctlfd_ack(struct evlist *evlist); -- 2.24.1
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