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Subject[PATCH 02/14] perf session: Add process callback to reader object
Date
Adding callback function to reader object so
callers can process data in different ways.

Link: http://lkml.kernel.org/n/tip-8g1islzz6xkl36tz0z1nkuff@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/session.c | 23 +++++++++++++++++++----
1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 2012396abb7c..b81182b7602a 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1835,10 +1835,17 @@ fetch_mmaped_event(struct perf_session *session,
#define NUM_MMAPS 128
#endif

+struct reader;
+
+typedef s64 (*reader_cb_t)(struct perf_session *session,
+ union perf_event *event,
+ u64 file_offset);
+
struct reader {
- int fd;
- u64 data_size;
- u64 data_offset;
+ int fd;
+ u64 data_size;
+ u64 data_offset;
+ reader_cb_t process;
};

static int
@@ -1909,7 +1916,7 @@ reader__process_events(struct reader *rd, struct perf_session *session,
size = event->header.size;

if (size < sizeof(struct perf_event_header) ||
- (skip = perf_session__process_event(session, event, file_pos)) < 0) {
+ (skip = rd->process(session, event, file_pos)) < 0) {
pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
file_offset + head, event->header.size,
event->header.type);
@@ -1935,12 +1942,20 @@ reader__process_events(struct reader *rd, struct perf_session *session,
return err;
}

+static s64 process_simple(struct perf_session *session,
+ union perf_event *event,
+ u64 file_offset)
+{
+ return perf_session__process_event(session, event, file_offset);
+}
+
static int __perf_session__process_events(struct perf_session *session)
{
struct reader rd = {
.fd = perf_data__fd(session->data),
.data_size = session->header.data_size,
.data_offset = session->header.data_offset,
+ .process = process_simple,
};
struct ordered_events *oe = &session->ordered_events;
struct perf_tool *tool = session->tool;
--
2.17.2
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