Initial commit to populate CoreCLR repo

[tfs-changeset: 1407945]

1 files changed, 147 insertions, 0 deletions

diff --git a/src/vm/cachelinealloc.h b/src/vm/cachelinealloc.h
new file mode 100644
index 0000000000..d2184f7174
--- /dev/null
+++ b/src/vm/cachelinealloc.h
@@ -0,0 +1,147 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+//---------------------------------------------------------------------------
+// CCacheLineAllocator
+//
+
+//
+// @doc
+// @module	cachelineAlloc.h
+//
+//		This file defines the CacheLine Allocator class.
+//
+// @comm
+//
+//    
+// <nl> Definitions.:
+// <nl>	Class Name						Header file
+// <nl>	---------------------------		---------------
+// <nl>	<c CCacheLineAllocator>			BAlloc.h
+//
+// <nl><nl>
+//  Notes:
+//		The CacheLineAllocator maintains a pool of free CacheLines
+//		
+//		The CacheLine Allocator provides static member functions 
+//		GetCacheLine and FreeCacheLine,
+//		
+// <nl><nl>
+//  
+//---------------------------------------------------------------------------
+
+#ifndef _H_CACHELINE_ALLOCATOR_
+#define _H_CACHELINE_ALLOCATOR_
+
+#include "slist.h"
+
+#include <pshpack1.h>
+
+class CacheLine
+{
+public:
+    enum
+    {
+        numEntries       = 15,
+        numValidBytes    = numEntries * sizeof(void *)
+    };
+
+    // store next pointer and the entries
+    SLink   m_Link;
+    union
+    {
+        void*   m_pAddr[numEntries];
+        BYTE    m_xxx[numValidBytes];
+    };
+
+    // init
+    void Init32()
+    {
+        CONTRACTL
+        {
+            NOTHROW;
+            GC_NOTRIGGER;
+            MODE_ANY;
+        }
+        CONTRACTL_END;
+
+        // initialize cacheline
+        memset(&m_Link,0,32); 
+    }
+
+    void Init64()
+    {
+        CONTRACTL
+        {
+            NOTHROW;
+            GC_NOTRIGGER;
+            MODE_ANY;
+        }
+        CONTRACTL_END;
+
+        // initialize cacheline
+        memset(&m_Link,0,64); 
+    }
+
+    CacheLine()
+    {
+        CONTRACTL
+        {
+            NOTHROW;
+            GC_NOTRIGGER;
+            MODE_ANY;
+        }
+        CONTRACTL_END;
+
+        // initialize cacheline
+        memset(&m_Link,0,sizeof(CacheLine)); 
+    }
+};
+#include <poppack.h>
+
+typedef CacheLine* LPCacheLine;
+
+/////////////////////////////////////////////////////////
+//		class CCacheLineAllocator
+//		Handles Allocation/DeAllocation of cache lines
+//		used for hash table overflow buckets
+///////////////////////////////////////////////////////
+class CCacheLineAllocator 
+{
+    typedef SList<CacheLine, true> REGISTRYLIST;
+    typedef SList<CacheLine, true> FREELIST32;
+    typedef SList<CacheLine, true> FREELIST64;
+
+public:
+
+    //constructor
+    CCacheLineAllocator ();
+    //destructor
+    ~CCacheLineAllocator ();
+   
+    // free cacheline blocks
+    FREELIST32         m_freeList32; //32 byte 
+    FREELIST64         m_freeList64; //64 byte
+
+    // registry for virtual free
+    REGISTRYLIST     m_registryList;
+    
+    void *VAlloc(ULONG cbSize);
+
+    void VFree(void* pv);
+
+	// GetCacheLine, 
+	void *	GetCacheLine32();
+    
+    // GetCacheLine, 
+	void *	GetCacheLine64();
+
+	// FreeCacheLine, 
+	void FreeCacheLine32(void *pCacheLine);
+
+	// FreeCacheLine, 
+	void FreeCacheLine64(void *pCacheLine);
+
+};
+#endif