Bug#34741098 component::deinit() will block if calling any registry

update APIs

1. A no_lock version of registry and registry_registration service
   is implemented which provides the same functionality without
   taking any lock on the registry.
2. MySQL command service is updated to use either the lock or
   no_lock version based on the new flag no_lock_registry added in
   mcs_ext.
3. The no_lock_registry flag is set to true by health monitor query
   thread before calling MySQL command service APIs (close, connect).

Change-Id: I8ebf8f07cffb8ddc4de0f17c48c10cb15be7dad8

components/libminchassis/CMakeLists.txt

@@ -33,6 +33,7 @@ SET(LIBMINCHASSIS_SOURCES
   mysql_component.cc
   mysql_service_implementation.cc
   registry.cc
+  registry_no_lock.cc
   rwlock_scoped_lock.cc
 )
 

components/libminchassis/minimal_chassis.cc

@@ -34,6 +34,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 #include "dynamic_loader_scheme_file_imp.h"
 #include "minimal_chassis_runtime_error_imp.h"
 #include "registry_imp.h"
+#include "registry_no_lock_imp.h"
 
 extern SERVICE_TYPE(registry) imp_mysql_minimal_chassis_registry;
 
@@ -52,10 +53,21 @@ BEGIN_SERVICE_IMPLEMENTATION(mysql_minimal_chassis, registry)
 mysql_registry_imp::acquire, mysql_registry_imp::acquire_related,
     mysql_registry_imp::release END_SERVICE_IMPLEMENTATION();
 
+BEGIN_SERVICE_IMPLEMENTATION(mysql_minimal_chassis_no_lock, registry)
+mysql_registry_no_lock_imp::acquire,
+    mysql_registry_no_lock_imp::acquire_related,
+    mysql_registry_no_lock_imp::release END_SERVICE_IMPLEMENTATION();
+
 BEGIN_SERVICE_IMPLEMENTATION(mysql_minimal_chassis, registry_registration)
 mysql_registry_imp::register_service, mysql_registry_imp::unregister,
     mysql_registry_imp::set_default END_SERVICE_IMPLEMENTATION();
 
+BEGIN_SERVICE_IMPLEMENTATION(mysql_minimal_chassis_no_lock,
+                             registry_registration)
+mysql_registry_no_lock_imp::register_service,
+    mysql_registry_no_lock_imp::unregister,
+    mysql_registry_no_lock_imp::set_default END_SERVICE_IMPLEMENTATION();
+
 BEGIN_SERVICE_IMPLEMENTATION(mysql_minimal_chassis, registry_query)
 mysql_registry_imp::iterator_create, mysql_registry_imp::iterator_get,
     mysql_registry_imp::iterator_next, mysql_registry_imp::iterator_is_valid,
@@ -104,7 +116,9 @@ mysql_runtime_error_imp::emit END_SERVICE_IMPLEMENTATION();
 
 BEGIN_COMPONENT_PROVIDES(mysql_minimal_chassis)
 PROVIDES_SERVICE(mysql_minimal_chassis, registry),
+    PROVIDES_SERVICE(mysql_minimal_chassis_no_lock, registry),
     PROVIDES_SERVICE(mysql_minimal_chassis, registry_registration),
+    PROVIDES_SERVICE(mysql_minimal_chassis_no_lock, registry_registration),
     PROVIDES_SERVICE(mysql_minimal_chassis, registry_query),
     PROVIDES_SERVICE(mysql_minimal_chassis, registry_metadata_enumerate),
     PROVIDES_SERVICE(mysql_minimal_chassis, registry_metadata_query),