From 26a5d3299c0c7140848ed379cac777e054ad2285 Mon Sep 17 00:00:00 2001
From: Pirulax <patrikjankovics7@gmail.com>
Date: Sat, 19 Jun 2021 01:43:54 +0200
Subject: [PATCH 1/3] Add engineStreamingFreeUpMemory

---
 Client/game_sa/CStreamingSA.cpp                         | 5 +++++
 Client/game_sa/CStreamingSA.h                           | 1 +
 Client/mods/deathmatch/logic/luadefs/CLuaEngineDefs.cpp | 7 +++++++
 Client/sdk/game/CStreaming.h                            | 1 +
 4 files changed, 14 insertions(+)

diff --git a/Client/game_sa/CStreamingSA.cpp b/Client/game_sa/CStreamingSA.cpp
index 9cfb6dc7b1..c2fae4af6b 100644
--- a/Client/game_sa/CStreamingSA.cpp
+++ b/Client/game_sa/CStreamingSA.cpp
@@ -152,3 +152,8 @@ void CStreamingSA::ReinitStreaming()
 
     reinitStreaming();
 }
+
+void CStreamingSA::MakeSpaceFor(std::uint32_t memoryToCleanInBytes)
+{
+    ((int(__cdecl*)(std::uint32_t))0x40E560)(memoryToCleanInBytes);
+}
diff --git a/Client/game_sa/CStreamingSA.h b/Client/game_sa/CStreamingSA.h
index 1172aa3f99..2c84173aba 100644
--- a/Client/game_sa/CStreamingSA.h
+++ b/Client/game_sa/CStreamingSA.h
@@ -29,6 +29,7 @@ class CStreamingSA : public CStreaming
     void RequestSpecialModel(DWORD model, const char* szTexture, DWORD channel);
     void ReinitStreaming();
     CStreamingInfo* GetStreamingInfoFromModelId(uint32 id);
+    void MakeSpaceFor(std::uint32_t memoryToCleanInBytes) override;
 
 private:
     static CStreamingInfo* ms_aInfoForModel; // count: 26316 in unmodified game
diff --git a/Client/mods/deathmatch/logic/luadefs/CLuaEngineDefs.cpp b/Client/mods/deathmatch/logic/luadefs/CLuaEngineDefs.cpp
index cfca7d5beb..a2a2c587b8 100644
--- a/Client/mods/deathmatch/logic/luadefs/CLuaEngineDefs.cpp
+++ b/Client/mods/deathmatch/logic/luadefs/CLuaEngineDefs.cpp
@@ -12,6 +12,11 @@
 #include "StdInc.h"
 #include <lua/CLuaFunctionParser.h>
 
+void EngineStreamingFreeUpMemory(std::uint32_t bytes)
+{
+    g_pGame->GetStreaming()->MakeSpaceFor(bytes);
+}
+
 void CLuaEngineDefs::LoadFunctions()
 {
     constexpr static const std::pair<const char*, lua_CFunction> functions[]{
@@ -52,6 +57,8 @@ void CLuaEngineDefs::LoadFunctions()
         {"engineRestoreObjectGroupPhysicalProperties", EngineRestoreObjectGroupPhysicalProperties},
         {"engineRestreamWorld", ArgumentParser<EngineRestreamWorld>},
 
+        {"engineStreamingFreeUpMemory", ArgumentParser<EngineStreamingFreeUpMemory>},
+
         // CLuaCFunctions::AddFunction ( "engineReplaceMatchingAtomics", EngineReplaceMatchingAtomics );
         // CLuaCFunctions::AddFunction ( "engineReplaceWheelAtomics", EngineReplaceWheelAtomics );
         // CLuaCFunctions::AddFunction ( "enginePositionAtomic", EnginePositionAtomic );
diff --git a/Client/sdk/game/CStreaming.h b/Client/sdk/game/CStreaming.h
index 5d32211405..16ddd6035c 100644
--- a/Client/sdk/game/CStreaming.h
+++ b/Client/sdk/game/CStreaming.h
@@ -48,4 +48,5 @@ class CStreaming
     virtual void RequestSpecialModel(DWORD model, const char* szTexture, DWORD channel) = 0;
     virtual CStreamingInfo* GetStreamingInfoFromModelId(uint32 id) = 0;
     virtual void ReinitStreaming() = 0;
+    virtual void MakeSpaceFor(std::uint32_t memoryToCleanInBytes) = 0;
 };

From 469e499e9ca7f9c4a3463f934b3befcdac1f55f3 Mon Sep 17 00:00:00 2001
From: Pirulax <patrikjankovics7@gmail.com>
Date: Tue, 3 Aug 2021 00:45:40 +0200
Subject: [PATCH 2/3] Fix wrong call address

---
 Client/game_sa/CStreamingSA.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Client/game_sa/CStreamingSA.cpp b/Client/game_sa/CStreamingSA.cpp
index c2fae4af6b..0dfef8376f 100644
--- a/Client/game_sa/CStreamingSA.cpp
+++ b/Client/game_sa/CStreamingSA.cpp
@@ -155,5 +155,5 @@ void CStreamingSA::ReinitStreaming()
 
 void CStreamingSA::MakeSpaceFor(std::uint32_t memoryToCleanInBytes)
 {
-    ((int(__cdecl*)(std::uint32_t))0x40E560)(memoryToCleanInBytes);
+    ((int(__cdecl*)(std::uint32_t))0x40E120)(memoryToCleanInBytes);
 }

From cd9eed3955dbb6da4442dee8dcd6b97e217de9ba Mon Sep 17 00:00:00 2001
From: Marek Kulik <me@botder.com>
Date: Tue, 3 Aug 2021 00:27:32 +0000
Subject: [PATCH 3/3] Update Client/game_sa/CStreamingSA.cpp

---
 Client/game_sa/CStreamingSA.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Client/game_sa/CStreamingSA.cpp b/Client/game_sa/CStreamingSA.cpp
index 0dfef8376f..ec520d511a 100644
--- a/Client/game_sa/CStreamingSA.cpp
+++ b/Client/game_sa/CStreamingSA.cpp
@@ -155,5 +155,5 @@ void CStreamingSA::ReinitStreaming()
 
 void CStreamingSA::MakeSpaceFor(std::uint32_t memoryToCleanInBytes)
 {
-    ((int(__cdecl*)(std::uint32_t))0x40E120)(memoryToCleanInBytes);
+    (reinterpret_cast<void(__cdecl*)(std::uint32_t)>(0x40E120))(memoryToCleanInBytes);
 }