[PATCH 4/4] perf tools: Factor out feature op to process header sections

From: Robert Richter
Date: Thu Dec 15 2011 - 11:40:58 EST


There is individual code for each feature to process header sections.
Adding a function pointer .process to struct feature_ops for keeping
the implementation in separate functions. Code to process header
sections is now a generic function.

Signed-off-by: Robert Richter <robert.richter@xxxxxxx>
---
tools/perf/util/header.c | 44 +++++++++++++++++++++++++++++---------------
1 files changed, 29 insertions(+), 15 deletions(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 65cfabc..1e38c10 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1455,25 +1455,48 @@ out:
return err;
}

+static int process_trace_info(struct perf_file_section *section __unused,
+ struct perf_header *ph __unused,
+ int feat __unused, int fd)
+{
+ trace_report(fd, false);
+ return 0;
+}
+
+static int process_build_id(struct perf_file_section *section,
+ struct perf_header *ph,
+ int feat __unused, int fd)
+{
+ if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
+ pr_debug("Failed to read buildids, continuing...\n");
+ return 0;
+}
+
struct feature_ops {
int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist);
void (*print)(struct perf_header *h, int fd, FILE *fp);
+ int (*process)(struct perf_file_section *section,
+ struct perf_header *h, int feat, int fd);
const char *name;
bool full_only;
};

#define FEAT_OPA(n, func) \
[n] = { .name = #n, .write = write_##func, .print = print_##func }
+#define FEAT_OPP(n, func) \
+ [n] = { .name = #n, .write = write_##func, .print = print_##func, \
+ .process = process_##func }
#define FEAT_OPF(n, func) \
- [n] = { .name = #n, .write = write_##func, .print = print_##func, .full_only = true }
+ [n] = { .name = #n, .write = write_##func, .print = print_##func, \
+ .full_only = true }

/* feature_ops not implemented: */
#define print_trace_info NULL
#define print_build_id NULL

static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
- FEAT_OPA(HEADER_TRACE_INFO, trace_info),
- FEAT_OPA(HEADER_BUILD_ID, build_id),
+ FEAT_OPP(HEADER_TRACE_INFO, trace_info),
+ FEAT_OPP(HEADER_BUILD_ID, build_id),
FEAT_OPA(HEADER_HOSTNAME, hostname),
FEAT_OPA(HEADER_OSRELEASE, osrelease),
FEAT_OPA(HEADER_VERSION, version),
@@ -1857,19 +1880,10 @@ static int perf_file_section__process(struct perf_file_section *section,
return 0;
}

- switch (feat) {
- case HEADER_TRACE_INFO:
- trace_report(fd, false);
- break;
- case HEADER_BUILD_ID:
- if (perf_header__read_build_ids(ph, fd, section->offset, section->size))
- pr_debug("Failed to read buildids, continuing...\n");
- break;
- default:
- break;
- }
+ if (!feat_ops[feat].process)
+ return 0;

- return 0;
+ return feat_ops[feat].process(section, ph, feat, fd);
}

static int perf_file_header__read_pipe(struct perf_pipe_file_header *header,
--
1.7.7


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/