From: Arnaldo Carvalho de Melo <[email protected]> To remove all entries in evlist->pollfd[] that have revents matching at least one of the bits in the specified mask.
It'll adjust evlist->nr_fds to the number of unfiltered fds and will return this value, as a convenience and to avoid requiring direct access to internal state of perf_evlist objects. This will be used after polling the evlist fds so that we remove fds that were closed by the kernel. Cc: Adrian Hunter <[email protected]> Cc: David Ahern <[email protected]> Cc: Don Zickus <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Mike Galbraith <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Stephane Eranian <[email protected]> Link: http://lkml.kernel.org/n/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/util/evlist.c | 16 ++++++++++++++++ tools/perf/util/evlist.h | 2 ++ 2 files changed, 18 insertions(+) diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c index a3e28b49128a..bd7896073d10 100644 --- a/tools/perf/util/evlist.c +++ b/tools/perf/util/evlist.c @@ -428,6 +428,22 @@ void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) evlist->nr_fds++; } +int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) +{ + int fd = 0, nr_fds = 0; + + while (fd < evlist->nr_fds) { + if ((evlist->pollfd[fd].revents & revents_and_mask) == 0) + ++nr_fds; + + if (++fd != nr_fds) + evlist->pollfd[nr_fds] = evlist->pollfd[fd]; + } + + evlist->nr_fds = nr_fds; + return nr_fds; +} + static void perf_evlist__id_hash(struct perf_evlist *evlist, struct perf_evsel *evsel, int cpu, int thread, u64 id) diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h index 106de53a6a74..1082420951f9 100644 --- a/tools/perf/util/evlist.h +++ b/tools/perf/util/evlist.h @@ -84,6 +84,8 @@ void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd); +int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask); + struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id); struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id); -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
