Move apiInitialized flag to Globals namespace (sonic-net#545)

* Move api mutex to global class and add sairedis namespace

* Move apiInitialized flag to Globals namespace

* Fix spelling

Author: kcudnik

lib/inc/Globals.h

@@ -26,5 +26,10 @@ namespace sairedis
              * a global API mutex is declared.
              */
             static std::mutex apimutex;
+
+            /**
+             * @brief Indicates whether SAI interface API is initialized.
+             */
+            static bool apiInitialized;
     };
 }

lib/src/Globals.cpp

@@ -1,3 +1,5 @@
 #include "Globals.h"
 
 std::mutex sairedis::Globals::apimutex;
+
+bool sairedis::Globals::apiInitialized = false;

lib/src/sai_redis_interfacequery.cpp

@@ -8,8 +8,9 @@
 #include "swss/selectableevent.h"
 #include <string.h>
 
+using namespace sairedis;
+
 sai_service_method_table_t g_services;
-bool                   g_apiInitialized = false;
 volatile bool          g_run = false;
 
 // this event is used to nice end notifications thread
@@ -102,7 +103,7 @@ sai_status_t sai_api_initialize(
 
     SWSS_LOG_ENTER();
 
-    if (g_apiInitialized)
+    if (Globals::apiInitialized)
     {
         SWSS_LOG_ERROR("api already initialized");
 
@@ -140,7 +141,7 @@ sai_status_t sai_api_initialize(
 
     notification_thread = std::make_shared<std::thread>(ntf_thread);
 
-    g_apiInitialized = true;
+    Globals::apiInitialized = true;
 
     return SAI_STATUS_SUCCESS;
 }
@@ -151,7 +152,7 @@ sai_status_t sai_api_uninitialize(void)
 
     SWSS_LOG_ENTER();
 
-    if (!g_apiInitialized)
+    if (!Globals::apiInitialized)
     {
         SWSS_LOG_ERROR("api not initialized");
 
@@ -167,7 +168,7 @@ sai_status_t sai_api_uninitialize(void)
 
     notification_thread->join();
 
-    g_apiInitialized = false;
+    Globals::apiInitialized = false;
 
     return SAI_STATUS_SUCCESS;
 }
@@ -205,7 +206,7 @@ sai_status_t sai_api_query(
         return SAI_STATUS_INVALID_PARAMETER;
     }
 
-    if (!g_apiInitialized)
+    if (!Globals::apiInitialized)
     {
         SWSS_LOG_ERROR("SAI API not initialized before calling API query");
         return SAI_STATUS_UNINITIALIZED;