Update NamedMutex (#1202)

NamedMutex stores global array of mutexes provided via reference.

Wrap them into unique_ptr to allow safely reordered elements
in container.

Relates-To: OLPSUP-14070

Signed-off-by: Iuliia Moroz <[email protected]>

Author: jmoro3

olp-cpp-sdk-dataservice-read/src/repositories/NamedMutex.cpp

@@ -19,8 +19,11 @@
 
 #include "NamedMutex.h"
 
+#include <memory>
 #include <unordered_map>
 
+#include <olp/core/porting/make_unique.h>
+
 namespace olp {
 namespace dataservice {
 namespace read {
@@ -31,7 +34,9 @@ namespace {
 static std::mutex gMutex;
 
 struct RefCounterMutex {
-  std::mutex mutex;
+  explicit RefCounterMutex() : mutex(std::make_unique<std::mutex>()) {}
+
+  std::unique_ptr<std::mutex> mutex;
   uint32_t use_count{0};
 };
 
@@ -41,7 +46,7 @@ std::mutex& AquireLock(const std::string& resource) {
   std::unique_lock<std::mutex> lock(gMutex);
   RefCounterMutex& ref_mutex = gMutexes[resource];
   ref_mutex.use_count++;
-  return ref_mutex.mutex;
+  return *ref_mutex.mutex;
 }
 
 void ReleaseLock(const std::string& resource) {