lkml.org 
[lkml]   [2022]   [Sep]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH V2 1/6] perf tools: Add perf_config_scan()
Date
To simplify getting a single config value, add a function to scan a config
variable.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
---
tools/perf/util/config.c | 31 +++++++++++++++++++++++++++++++
tools/perf/util/config.h | 1 +
2 files changed, 32 insertions(+)

diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 60ce5908c664..3f2ae19a1dd4 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -908,3 +908,34 @@ void set_buildid_dir(const char *dir)
/* for communicating with external commands */
setenv("PERF_BUILDID_DIR", buildid_dir, 1);
}
+
+struct perf_config_scan_data {
+ const char *name;
+ const char *fmt;
+ va_list args;
+ int ret;
+};
+
+static int perf_config_scan_cb(const char *var, const char *value, void *data)
+{
+ struct perf_config_scan_data *d = data;
+
+ if (!strcmp(var, d->name))
+ d->ret = vsscanf(value, d->fmt, d->args);
+
+ return 0;
+}
+
+int perf_config_scan(const char *name, const char *fmt, ...)
+{
+ struct perf_config_scan_data d = {
+ .name = name,
+ .fmt = fmt,
+ };
+
+ va_start(d.args, fmt);
+ perf_config(perf_config_scan_cb, &d);
+ va_end(d.args);
+
+ return d.ret;
+}
diff --git a/tools/perf/util/config.h b/tools/perf/util/config.h
index 2fd77aaff4d2..2e5e808928a5 100644
--- a/tools/perf/util/config.h
+++ b/tools/perf/util/config.h
@@ -29,6 +29,7 @@ typedef int (*config_fn_t)(const char *, const char *, void *);

int perf_default_config(const char *, const char *, void *);
int perf_config(config_fn_t fn, void *);
+int perf_config_scan(const char *name, const char *fmt, ...) __scanf(2, 3);
int perf_config_set(struct perf_config_set *set,
config_fn_t fn, void *data);
int perf_config_int(int *dest, const char *, const char *);
--
2.25.1
\
 
 \ /
  Last update: 2022-09-05 09:35    [W:0.083 / U:0.404 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site