perf tools: Add perf_data_file__write interface

Adding perf_data_file__write interface to centralize output to files.
The function prototype is:

  ssize_t perf_data_file__write(struct perf_data_file *file,
                                void *buf, size_t size);

Returns number of bytes written or -1 in case of error.

NOTE: Also indenting 'struct perf_data_file' members, no functional
      change done.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1385634619-8129-6-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
index 7d09faf85cf16f2b4c9dead1f4e3b36a5c7c9c06..1fbcd8bdc11b8b387c4f9f2f1a57ae6807e9e92c 100644 (file)
--- a/tools/perf/util/data.c
+++ b/tools/perf/util/data.c
@@ -118,3 +118,9 @@ void perf_data_file__close(struct perf_data_file *file)
 {
        close(file->fd);
 }
+
+ssize_t perf_data_file__write(struct perf_data_file *file,
+                             void *buf, size_t size)
+{
+       return writen(file->fd, buf, size);
+}

diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h
index 8c2df80152a519f02c2e699bf703840ce46efd1c..2b15d0c95c7f312de08a36a05b08c8356b039616 100644 (file)
--- a/tools/perf/util/data.h
+++ b/tools/perf/util/data.h
@@ -9,12 +9,12 @@ enum perf_data_mode {
 };
 
 struct perf_data_file {
-       const char *path;
-       int fd;
-       bool is_pipe;
-       bool force;
-       unsigned long size;
-       enum perf_data_mode mode;
+       const char              *path;
+       int                      fd;
+       bool                     is_pipe;
+       bool                     force;
+       unsigned long            size;
+       enum perf_data_mode      mode;
 };
 
 static inline bool perf_data_file__is_read(struct perf_data_file *file)
@@ -44,5 +44,7 @@ static inline unsigned long perf_data_file__size(struct perf_data_file *file)
 
 int perf_data_file__open(struct perf_data_file *file);
 void perf_data_file__close(struct perf_data_file *file);
+ssize_t perf_data_file__write(struct perf_data_file *file,
+                             void *buf, size_t size);
 
 #endif /* __PERF_DATA_H */