1 files changed, 172 insertions, 0 deletions
diff --git a/tier0/mem_helpers.cpp b/tier0/mem_helpers.cpp
new file mode 100644
index 0000000..b55c4e4
--- /dev/null
+++ b/tier0/mem_helpers.cpp
@@ -0,0 +1,172 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#include "pch_tier0.h"
+#include "mem_helpers.h"
+#include <string.h>
+#include <malloc.h>
+
+bool g_bInitMemory = true;
+
+#ifdef POSIX
+void DoApplyMemoryInitializations( void *pMem, int nSize )
+{
+}
+
+size_t CalcHeapUsed()
+{
+	return 0;
+}
+
+#else
+
+unsigned long g_dwFeeFee = 0xffeeffee;
+
+// Generated by Mathematica.
+unsigned char g_RandomValues[256] = {
+	95, 126, 220, 71, 92, 179, 95, 219, 111, 150, 38, 155, 181, 62, 40, 231, 238,
+	54, 47, 55, 186, 204, 64, 70, 118, 94, 107, 251, 199, 140, 67, 87, 86, 127,
+	210, 41, 21, 90, 208, 24, 167, 204, 32, 254, 38, 51, 9, 11, 38, 33, 188, 104,
+	0, 75, 119, 24, 122, 203, 24, 164, 250, 224, 241, 182, 213, 201, 173, 67,
+	200, 255, 244, 227, 46, 219, 26, 149, 218, 132, 120, 154, 227, 244, 106, 198,
+	109, 87, 150, 40, 16, 99, 169, 193, 100, 156, 78, 171, 246, 47, 84, 119, 10,
+	52, 207, 171, 230, 90, 90, 127, 180, 153, 68, 140, 62, 14, 87, 57, 208, 154,
+	116, 29, 131, 177, 224, 187, 51, 148, 142, 245, 152, 230, 184, 117, 91, 146,
+	235, 153, 35, 104, 187, 177, 215, 131, 17, 49, 211, 244, 60, 152, 103, 248,
+	51, 224, 237, 240, 51, 30, 10, 233, 253, 106, 252, 73, 134, 136, 178, 86,
+	228, 107, 77, 255, 85, 242, 204, 119, 102, 53, 209, 35, 123, 32, 252, 210,
+	43, 12, 136, 167, 155, 210, 71, 254, 178, 172, 3, 230, 93, 208, 196, 68, 235,
+	16, 106, 189, 201, 177, 85, 78, 206, 187, 48, 68, 64, 190, 117, 236, 49, 174,
+	105, 63, 207, 70, 170, 93, 6, 110, 52, 111, 169, 92, 247, 86, 10, 174, 207,
+	240, 104, 209, 81, 177, 123, 189, 175, 212, 101, 219, 114, 243, 44, 91, 51,
+	139, 91, 57, 120, 41, 98, 119 };
+
+unsigned long g_iCurRandomValueOffset = 0;
+
+
+void InitializeToFeeFee( void *pMem, int nSize )
+{
+	unsigned long *pCurDWord = (unsigned long*)pMem;
+	int nDWords = nSize >> 2;
+	while ( nDWords )
+	{
+		*pCurDWord = 0xffeeffee;
+		++pCurDWord;
+		--nDWords;
+	}
+	
+	unsigned char *pCurChar = (unsigned char*)pCurDWord;
+	int nBytes = nSize & 3;
+	int iOffset = 0;
+	while ( nBytes )
+	{
+		*pCurChar = ((unsigned char*)&g_dwFeeFee)[iOffset];
+		++iOffset;
+		--nBytes;
+		++pCurChar;
+	}			
+}
+
+
+void InitializeToRandom( void *pMem, int nSize )
+{
+	unsigned char *pOut = (unsigned char *)pMem;
+	for ( int i=0; i < nSize; i++ )
+	{
+		pOut[i] = g_RandomValues[(g_iCurRandomValueOffset & 255)];
+		++g_iCurRandomValueOffset;
+	}
+}
+
+
+void DoApplyMemoryInitializations( void *pMem, int nSize )
+{
+	if ( !pMem )
+		return;
+	
+	// If they passed -noinitmemory on the command line, don't do anything here.
+	Assert( g_bInitMemory );
+
+	// First time we get in here, remember all the settings.
+	static bool bDebuggerPresent = Plat_IsInDebugSession();
+	static bool bCheckedCommandLine = false;
+	static bool bRandomizeMemory = false;
+	if ( !bCheckedCommandLine )
+	{
+		bCheckedCommandLine = true;
+		
+		//APS
+		char *pStr = (char*)Plat_GetCommandLineA();
+		if ( pStr )
+		{
+			char tempStr[512];
+			strncpy( tempStr, pStr, sizeof( tempStr ) - 1 );
+			tempStr[ sizeof( tempStr ) - 1 ] = 0;
+			_strupr( tempStr );
+			
+			if ( strstr( tempStr, "-RANDOMIZEMEMORY" ) )
+				bRandomizeMemory = true;
+			
+			if ( strstr( tempStr, "-NOINITMEMORY" ) )
+				g_bInitMemory = false;
+		}
+	}
+
+	if ( bRandomizeMemory )
+	{
+		// They asked for it.. randomize all the memory.
+		InitializeToRandom( pMem, nSize );
+	}
+	else
+	{
+		if ( bDebuggerPresent )
+		{
+			// Ok, it's already set to 0xbaadf00d, but we want something that will make floating-point #'s NANs.
+			InitializeToFeeFee( pMem, nSize );
+		}
+		else
+		{
+#ifdef _DEBUG
+			// Ok, it's already set to 0xcdcdcdcd, but we want something that will make floating-point #'s NANs.
+			InitializeToFeeFee( pMem, nSize );
+#endif
+		}
+	}
+}
+
+size_t CalcHeapUsed()
+{
+#if defined( _X360 )
+	return 0;
+#else
+	_HEAPINFO	hinfo;
+	int			heapstatus;
+	intp			nTotal;
+
+	nTotal = 0;
+	hinfo._pentry = NULL;
+	while( ( heapstatus = _heapwalk( &hinfo ) ) == _HEAPOK )
+	{
+		nTotal += (hinfo._useflag == _USEDENTRY) ? hinfo._size : 0;
+	}
+
+	switch (heapstatus)
+	{
+		case _HEAPEMPTY:
+		case _HEAPEND:
+			// success
+			break;
+
+		default:
+			// heap corrupted
+			nTotal = -1;
+	}
+
+	return nTotal;
+#endif
+}
+#endif
+