[PATCH 20/23] perf tools: Change perf_mem__lck_scnprintf to return nb of displayed bytes

From: Jiri Olsa
Date: Mon Feb 15 2016 - 03:36:05 EST


Moving strncat call into scnprintf to easily track
number of displayed bytes. It will be used in following patch.

Link: http://lkml.kernel.org/n/tip-oqjs8kf50g0n65uj8sfqlb8y@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
tools/perf/util/mem-events.c | 12 +++++++-----
tools/perf/util/mem-events.h | 2 +-
2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index aaeb619a9e77..0da707da127c 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -255,18 +255,20 @@ int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
return l;
}

-void perf_mem__lck_scnprintf(char *out, size_t sz __maybe_unused,
- struct mem_info *mem_info)
+int perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
{
u64 mask = PERF_MEM_LOCK_NA;
+ int l;

if (mem_info)
mask = mem_info->data_src.mem_lock;

if (mask & PERF_MEM_LOCK_NA)
- strncat(out, "N/A", 3);
+ l = scnprintf(out, sz, "N/A");
else if (mask & PERF_MEM_LOCK_LOCKED)
- strncat(out, "Yes", 3);
+ l = scnprintf(out, sz, "Yes");
else
- strncat(out, "No", 2);
+ l = scnprintf(out, sz, "No");
+
+ return l;
}
diff --git a/tools/perf/util/mem-events.h b/tools/perf/util/mem-events.h
index 4b5d0b93979b..759d35da2d6a 100644
--- a/tools/perf/util/mem-events.h
+++ b/tools/perf/util/mem-events.h
@@ -48,7 +48,7 @@ struct mem_info;
int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
-void perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info);
+int perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info);

#endif /* __PERF_MEM_EVENTS_H */

--
2.4.3