From d94f3c4155d8248bb08cbbf7fcd96d8d3d44516d Mon Sep 17 00:00:00 2001
From: Ryan Houdek <Sonicadvance1@gmail.com>
Date: Mon, 28 Jan 2013 15:18:54 -0600
Subject: [PATCH] Stop using std::pair and std::map. Switch over to u64 and
 std::unordered_map. Provides a very small speed boost.

---
 .../Plugin_VideoOGL/Src/ProgramShaderCache.cpp       | 10 +++++++---
 .../Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.h | 12 ++++++++----
 2 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.cpp b/Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.cpp
index 974d839900..e1763038ec 100644
--- a/Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.cpp
+++ b/Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.cpp
@@ -37,7 +37,11 @@ GLenum ProgramFormat;
 
 GLuint ProgramShaderCache::PCacheEntry::prog_format = 0;
 
-std::pair<u32, u32> ProgramShaderCache::CurrentShaderProgram;
+u64 ProgramShaderCache::CurrentShaderProgram;
+u64 Create_Pair(u32 key1, u32 key2)
+{
+	return (((u64)key1) << 32) | key2;
+}
 const char *UniformNames[NUM_UNIFORMS] =
 {
 	// PIXEL SHADER UNIFORMS
@@ -142,7 +146,7 @@ void ProgramShaderCache::SetBothShaders(GLuint PS, GLuint VS)
 		return;
 	}
 	
-	std::pair<u32, u32> ShaderPair = std::make_pair(PS, VS);
+	u64 ShaderPair = Create_Pair(PS, VS);
 	
 	// program is already bound
 	if(ShaderPair == CurrentShaderProgram) return;
@@ -264,7 +268,7 @@ void ProgramShaderCache::Init(void)
 	}
 	
 	CurrentProgram = 0;
-	CurrentShaderProgram = std::pair<u32,u32>(0,0);
+	CurrentShaderProgram = 0;
 }
 
 void ProgramShaderCache::Shutdown(void)
diff --git a/Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.h b/Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.h
index 004f820def..1f4fefdc6f 100644
--- a/Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.h
+++ b/Source/Plugins/Plugin_VideoOGL/Src/ProgramShaderCache.h
@@ -15,7 +15,8 @@
 // Official SVN repository and contact information can be found at
 // http://code.google.com/p/dolphin-emu/
 
-#pragma once
+#ifndef PROGRAM_SHADER_CACHE_H_
+#define PROGRAM_SHADER_CACHE_H_
 
 #include "GLUtil.h"
 
@@ -27,16 +28,18 @@
 #include "LinearDiskCache.h"
 #include "ConfigManager.h"
 
+#include <unordered_map>
+
 namespace OGL
 {
 
 const int NUM_UNIFORMS = 19;
 extern const char *UniformNames[NUM_UNIFORMS];
+u64 Create_Pair(u32 key1, u32 key2);
 
 class ProgramShaderCache
 {
 public:
-	typedef std::pair<u32, u32> ShaderUID;
 
 	struct PCacheEntry
 	{
@@ -59,7 +62,7 @@ public:
 		{
 			psid = pix_id;
 			vsid = vert_id;
-			uid = std::make_pair(psid, vsid);
+			uid = Create_Pair(psid, vsid);
 			prog_id = glCreateProgram();
 		}
 
@@ -147,7 +150,7 @@ private:
 		}
 	};
 
-	typedef std::map<ShaderUID, PCacheEntry> PCache;
+	typedef std::unordered_map<u64, PCacheEntry> PCache;
 
 	static PCache pshaders;
 	static GLuint CurrentProgram;
@@ -164,3 +167,4 @@ private:
 };
 
 }  // namespace OGL
+#endif