build: Make a few more functions const

Signed-off-by: Federico Aponte <[email protected]>

userspace/libsinsp/sinsp.cpp

@@ -708,7 +708,7 @@ void sinsp::open_test_input(scap_test_input_data* data, sinsp_mode_t mode)
 
 /*=============================== Engine related ===============================*/
 
-bool sinsp::check_current_engine(const std::string& engine_name)
+bool sinsp::check_current_engine(const std::string& engine_name) const
 {
 	return scap_check_current_engine(m_h, engine_name.data());
 }
@@ -1876,11 +1876,21 @@ scap_stats_v2* sinsp::get_sinsp_stats_v2_buffer()
 	return m_sinsp_stats_v2_buffer;
 }
 
+const scap_stats_v2* sinsp::get_sinsp_stats_v2_buffer() const
+{
+	return m_sinsp_stats_v2_buffer;
+}
+
 std::shared_ptr<sinsp_stats_v2> sinsp::get_sinsp_stats_v2()
 {
 	return m_sinsp_stats_v2;
 }
 
+std::shared_ptr<const sinsp_stats_v2> sinsp::get_sinsp_stats_v2() const
+{
+	return m_sinsp_stats_v2;
+}
+
 sinsp_filter_check* sinsp::new_generic_filtercheck()
 {
 	return new sinsp_filter_check_gen_event();

userspace/libsinsp/sinsp.h

@@ -487,13 +487,15 @@ class SINSP_PUBLIC sinsp : public capture_stats_source
 	  \note sinsp stats may be refactored near-term.
 	*/
 	scap_stats_v2* get_sinsp_stats_v2_buffer();
+	const scap_stats_v2* get_sinsp_stats_v2_buffer() const;
 
 	/*!
 	  \brief Return sinsp stats v2 containing continually updated counters around thread and fd state tables.
 
 	  \note sinsp stats may be refactored near-term.
 	*/
 	std::shared_ptr<sinsp_stats_v2> get_sinsp_stats_v2();
+	std::shared_ptr<const sinsp_stats_v2> get_sinsp_stats_v2() const;
 
 	/*!
 	  \brief Look up a thread given its tid and return its information,
@@ -862,7 +864,7 @@ class SINSP_PUBLIC sinsp : public capture_stats_source
 	 * @param engine_name engine that we want to check.
 	 * @return true if the passed engine is the active one otherwise false.
 	 */
-	bool check_current_engine(const std::string& engine_name);
+	bool check_current_engine(const std::string& engine_name) const;
 
 	/*=============================== Engine related ===============================*/