From d77c894adcf98ee9894eb4a9765d0b40908c3585 Mon Sep 17 00:00:00 2001
From: kiritow <1362050620@qq.com>
Date: Thu, 11 May 2017 11:53:26 +0800
Subject: [PATCH] Add SharedLibrary Support

---
 MiniEngine.cpp | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 MiniEngine.h   | 13 +++++++++++++
 2 files changed, 61 insertions(+)

diff --git a/MiniEngine.cpp b/MiniEngine.cpp
index 4b23056..283bcd6 100644
--- a/MiniEngine.cpp
+++ b/MiniEngine.cpp
@@ -1310,6 +1310,54 @@ namespace MiniEngine
 	    va_end(ap);
 	}
 
+    SharedLibrary::SharedLibrary()
+    {
+        _obj=nullptr;
+    }
+
+    SharedLibrary::SharedLibrary(const std::string& Filename)
+    {
+        _obj=nullptr;
+        load(Filename);
+    }
+
+    SharedLibrary::~SharedLibrary()
+    {
+        if(_obj)
+        {
+            unload();
+        }
+    }
+
+    int SharedLibrary::load(const std::string& Filename)
+    {
+        if(_obj) return -1;
+        else
+        {
+            _obj=SDL_LoadObject(Filename.c_str());
+            if(_obj) return 0;
+            else return -2;
+        }
+    }
+
+    int SharedLibrary::unload()
+    {
+        if(_obj)
+        {
+            SDL_UnloadObject(_obj);
+            _obj=nullptr;
+            return 0;
+        }
+        else return -1;
+    }
+
+    void* SharedLibrary::get(const std::string& FunctionName)
+    {
+        if(!_obj) return nullptr;
+        else return SDL_LoadFunction(_obj,FunctionName.c_str());
+    }
+
+
 	int SDLSystem::SDLInit()
 	{
 		return SDL_Init(SDL_INIT_EVERYTHING);
diff --git a/MiniEngine.h b/MiniEngine.h
index 387e007..4f09bc4 100644
--- a/MiniEngine.h
+++ b/MiniEngine.h
@@ -429,6 +429,19 @@ namespace MiniEngine
 	    static void critical(const char* fmt,...);/// Critical
 	};
 
+	class SharedLibrary
+	{
+    public:
+        SharedLibrary();
+        SharedLibrary(const std::string& Filename);
+        ~SharedLibrary();
+        int load(const std::string& Filename);
+        int unload();
+        void* get(const std::string& FunctionName);
+    private:
+        void* _obj;
+	};
+
 	class SDLSystem
 	{
 	public: