Core/Misc: Replace boost::shared_mutex with std::shared_mutex (#24328)

* Core/Misc: Replace boost::shared_mutex with std::shared_mutex

* Remove std forward declarations

(cherry picked from commit 7032ee0bdb47c995dfd89bce3d5b6fad13ec6d73)

2 files changed, 8 insertions, 12 deletions

diff --git a/src/server/shared/Realm/RealmList.cpp b/src/server/shared/Realm/RealmList.cpp
index 094982d001c..1f1cd6326f0 100644
--- a/src/server/shared/Realm/RealmList.cpp
+++ b/src/server/shared/Realm/RealmList.cpp
@@ -29,13 +29,10 @@
 #include "game_utilities_service.pb.h"
 #include "RealmList.pb.h"
 #include <boost/asio/ip/tcp.hpp>
-#include <boost/thread/locks.hpp>
-#include <boost/thread/shared_mutex.hpp>
 #include <zlib.h>
 
 RealmList::RealmList() : _updateInterval(0)
 {
-    _realmsMutex = std::make_unique<boost::shared_mutex>();
 }
 
 RealmList::~RealmList() = default;
@@ -211,7 +208,7 @@ void RealmList::UpdateRealms(boost::system::error_code const& error)
         TC_LOG_INFO("realmlist", "Removed realm \"%s\".", itr->second.c_str());
 
     {
-        std::unique_lock<boost::shared_mutex> lock(*_realmsMutex);
+        std::unique_lock<std::shared_mutex> lock(_realmsMutex);
 
         _subRegions.swap(newSubRegions);
         _realms.swap(newRealms);
@@ -226,7 +223,7 @@ void RealmList::UpdateRealms(boost::system::error_code const& error)
 
 Realm const* RealmList::GetRealm(Battlenet::RealmHandle const& id) const
 {
-    boost::shared_lock<boost::shared_mutex> lock(*_realmsMutex);
+    std::shared_lock<std::shared_mutex> lock(_realmsMutex);
     auto itr = _realms.find(id);
     if (itr != _realms.end())
         return &itr->second;
@@ -254,7 +251,7 @@ uint32 RealmList::GetMinorMajorBugfixVersionForBuild(uint32 build) const
 
 void RealmList::WriteSubRegions(bgs::protocol::game_utilities::v1::GetAllValuesForAttributeResponse* response) const
 {
-    boost::shared_lock<boost::shared_mutex> lock(*_realmsMutex);
+    std::shared_lock<std::shared_mutex> lock(_realmsMutex);
     for (std::string const& subRegion : _subRegions)
         response->add_attribute_value()->set_string_value(subRegion);
 }
@@ -262,7 +259,7 @@ void RealmList::WriteSubRegions(bgs::protocol::game_utilities::v1::GetAllValuesF
 std::vector<uint8> RealmList::GetRealmEntryJSON(Battlenet::RealmHandle const& id, uint32 build) const
 {
     std::vector<uint8> compressed;
-    boost::shared_lock<boost::shared_mutex> lock(*_realmsMutex);
+    std::shared_lock<std::shared_mutex> lock(_realmsMutex);
     if (Realm const* realm = GetRealm(id))
     {
         if (!(realm->Flags & REALM_FLAG_OFFLINE) && realm->Build == build)
@@ -317,7 +314,7 @@ std::vector<uint8> RealmList::GetRealmList(uint32 build, std::string const& subR
 {
     JSON::RealmList::RealmListUpdates realmList;
     {
-        boost::shared_lock<boost::shared_mutex> lock(*_realmsMutex);
+        std::shared_lock<std::shared_mutex> lock(_realmsMutex);
         for (auto const& realm : _realms)
         {
             if (realm.second.Id.GetSubRegionAddress() != subRegion)
@@ -376,7 +373,7 @@ std::vector<uint8> RealmList::GetRealmList(uint32 build, std::string const& subR
 uint32 RealmList::JoinRealm(uint32 realmAddress, uint32 build, boost::asio::ip::address const& clientAddress, std::array<uint8, 32> const& clientSecret,
     LocaleConstant locale, std::string const& os, std::string accountName, bgs::protocol::game_utilities::v1::ClientResponse* response) const
 {
-    boost::shared_lock<boost::shared_mutex> lock(*_realmsMutex);
+    std::shared_lock<std::shared_mutex> lock(_realmsMutex);
     if (Realm const* realm = GetRealm(Battlenet::RealmHandle(realmAddress)))
     {
         if (realm->Flags & REALM_FLAG_OFFLINE || realm->Build != build)
diff --git a/src/server/shared/Realm/RealmList.h b/src/server/shared/Realm/RealmList.h
index bd7270e73a3..9bf64270589 100644
--- a/src/server/shared/Realm/RealmList.h
+++ b/src/server/shared/Realm/RealmList.h
@@ -22,6 +22,7 @@
 #include "Realm.h"
 #include <array>
 #include <map>
+#include <shared_mutex>
 #include <vector>
 #include <unordered_set>
 
@@ -38,8 +39,6 @@ struct RealmBuildInfo
 
 namespace boost
 {
-    class shared_mutex;
-
     namespace system
     {
         class error_code;
@@ -102,7 +101,7 @@ private:
         uint16 port, uint8 icon, RealmFlags flag, uint8 timezone, AccountTypes allowedSecurityLevel, float population);
 
     std::vector<RealmBuildInfo> _builds;
-    std::unique_ptr<boost::shared_mutex> _realmsMutex;
+    mutable std::shared_mutex _realmsMutex;
     RealmMap _realms;
     std::unordered_set<std::string> _subRegions;
     uint32 _updateInterval;