[PATCH 1/5] kernel-shark: Add method for checking if a given ID filter is set

["Yordan Karadzhov (VMware)" <y.karadz@gmail.com>]

The method is already defined and used as a static function in
libkshark.c and libkshark-configio.c (basically having two identical
copies). Now we are making this method part of the API. We will later
use this method in the GUI (following patch).

Signed-off-by: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
---
 kernel-shark/src/libkshark-configio.c | 17 ++++++-----------
 kernel-shark/src/libkshark.c          | 21 ++++++++++++++-------
 kernel-shark/src/libkshark.h          |  2 ++
 3 files changed, 22 insertions(+), 18 deletions(-)

diff --git a/kernel-shark/src/libkshark-configio.c b/kernel-shark/src/libkshark-configio.c
index 5d7323f..f01a39b 100644
--- a/kernel-shark/src/libkshark-configio.c
+++ b/kernel-shark/src/libkshark-configio.c
@@ -1306,11 +1306,6 @@ bool kshark_import_user_mask(struct kshark_context *kshark_ctx,
 	}
 }
 
-static bool filter_is_set(struct tracecmd_filter_id *filter)
-{
-	return filter && filter->count;
-}
-
 /**
  * @brief Record the current configuration of "show task" and "hide task"
  *	  filters into a Json document.
@@ -1335,13 +1330,13 @@ bool kshark_export_all_event_filters(struct kshark_context *kshark_ctx,
 		return false;
 
 	/* Save a filter only if it contains Id values. */
-	if (filter_is_set(kshark_ctx->show_event_filter))
+	if (kshark_this_filter_is_set(kshark_ctx->show_event_filter))
 		ret &= kshark_export_event_filter(kshark_ctx->pevent,
 						  kshark_ctx->show_event_filter,
 						  KS_SHOW_EVENT_FILTER_NAME,
 						  *conf);
 
-	if (filter_is_set(kshark_ctx->hide_event_filter))
+	if (kshark_this_filter_is_set(kshark_ctx->hide_event_filter))
 		ret &= kshark_export_event_filter(kshark_ctx->pevent,
 						  kshark_ctx->hide_event_filter,
 						  KS_HIDE_EVENT_FILTER_NAME,
@@ -1374,12 +1369,12 @@ bool kshark_export_all_task_filters(struct kshark_context *kshark_ctx,
 		return false;
 
 	/* Save a filter only if it contains Id values. */
-	if (filter_is_set(kshark_ctx->show_task_filter))
+	if (kshark_this_filter_is_set(kshark_ctx->show_task_filter))
 		ret &= kshark_export_filter_array(kshark_ctx->show_task_filter,
 						  KS_SHOW_TASK_FILTER_NAME,
 						  *conf);
 
-	if (filter_is_set(kshark_ctx->hide_task_filter))
+	if (kshark_this_filter_is_set(kshark_ctx->hide_task_filter))
 		ret &= kshark_export_filter_array(kshark_ctx->hide_task_filter,
 						  KS_HIDE_TASK_FILTER_NAME,
 						  *conf);
@@ -1412,12 +1407,12 @@ bool kshark_export_all_cpu_filters(struct kshark_context *kshark_ctx,
 		return false;
 
 	/* Save a filter only if it contains Id values. */
-	if (filter_is_set(kshark_ctx->show_task_filter))
+	if (kshark_this_filter_is_set(kshark_ctx->show_task_filter))
 		ret &= kshark_export_filter_array(kshark_ctx->show_cpu_filter,
 						  KS_SHOW_CPU_FILTER_NAME,
 						  *conf);
 
-	if (filter_is_set(kshark_ctx->hide_task_filter))
+	if (kshark_this_filter_is_set(kshark_ctx->hide_task_filter))
 		ret &= kshark_export_filter_array(kshark_ctx->hide_cpu_filter,
 						  KS_HIDE_CPU_FILTER_NAME,
 						  *conf);
diff --git a/kernel-shark/src/libkshark.c b/kernel-shark/src/libkshark.c
index a361578..0905359 100644
--- a/kernel-shark/src/libkshark.c
+++ b/kernel-shark/src/libkshark.c
@@ -445,7 +445,14 @@ void kshark_filter_clear(struct kshark_context *kshark_ctx, int filter_id)
 	tracecmd_filter_id_clear(filter);
 }
 
-static bool filter_is_set(struct tracecmd_filter_id *filter)
+/**
+ * @brief Check if a given Id filter is set.
+ *
+ * @param filter: Input location for the Id filster.
+ *
+ * @returns True if the Id filter is set, otherwise False.
+ */
+bool kshark_this_filter_is_set(struct tracecmd_filter_id *filter)
 {
 	return filter && filter->count;
 }
@@ -459,12 +466,12 @@ static bool filter_is_set(struct tracecmd_filter_id *filter)
  */
 bool kshark_filter_is_set(struct kshark_context *kshark_ctx)
 {
-	return filter_is_set(kshark_ctx->show_task_filter) ||
-	       filter_is_set(kshark_ctx->hide_task_filter) ||
-	       filter_is_set(kshark_ctx->show_cpu_filter) ||
-	       filter_is_set(kshark_ctx->hide_cpu_filter) ||
-	       filter_is_set(kshark_ctx->show_event_filter) ||
-	       filter_is_set(kshark_ctx->hide_event_filter);
+	return kshark_this_filter_is_set(kshark_ctx->show_task_filter) ||
+-              kshark_this_filter_is_set(kshark_ctx->hide_task_filter) ||
+-              kshark_this_filter_is_set(kshark_ctx->show_cpu_filter) ||
+-              kshark_this_filter_is_set(kshark_ctx->hide_cpu_filter) ||
+-              kshark_this_filter_is_set(kshark_ctx->show_event_filter) ||
+-              kshark_this_filter_is_set(kshark_ctx->hide_event_filter);
 }
 
 static inline void unset_event_filter_flag(struct kshark_context *kshark_ctx,
diff --git a/kernel-shark/src/libkshark.h b/kernel-shark/src/libkshark.h
index e795ed4..0d6c50d 100644
--- a/kernel-shark/src/libkshark.h
+++ b/kernel-shark/src/libkshark.h
@@ -261,6 +261,8 @@ void kshark_filter_add_id(struct kshark_context *kshark_ctx,
 
 void kshark_filter_clear(struct kshark_context *kshark_ctx, int filter_id);
 
+bool kshark_this_filter_is_set(struct tracecmd_filter_id *filter);
+
 bool kshark_filter_is_set(struct kshark_context *kshark_ctx);
 
 void kshark_filter_entries(struct kshark_context *kshark_ctx,
-- 
2.20.1