Get Memory Usage?

[Josh]

I am using "->" because the compiler complains if I use ".". No idea why. This code causes a buffer overrun:

unsigned long GetMemoryUsage()
{
#ifdef WINDOWS
PPROCESS_MEMORY_COUNTERS process_memory_counters;
Print(String(sizeof(process_memory_counters)));
if (GetProcessMemoryInfo(GetCurrentProcess(),process_memory_counters,process_memory_counters->cb))
{
	return process_memory_counters->WorkingSetSize;
}
else
{
	Print(String(GetLastError()));
	return 0;
}
#endif
return 0;
}

[Josh]

Ah, here is the working code. TypeDef is evil:

unsigned long GetMemoryUsage()
{
unsigned long result = 0;	
#ifdef WINDOWS
PROCESS_MEMORY_COUNTERS process_memory_counters;
if (GetProcessMemoryInfo(GetCurrentProcess(),&process_memory_counters,sizeof(process_memory_counters)))
{
	result = process_memory_counters.WorkingSetSize;
}
#endif
return result;
}

[Canardia]

In Framewerk (LE2.27) there is MemFree and MemUsed:

// Draw useful information onscreen
void Renderer::DrawStats( int mode )
{
const int spacing = 16;
const int indent  =  1;
SetBlend(BLEND_ALPHA);
DrawShadowText( indent, indent, "FPS: %3.0f", UPS() );
if( 2 == mode )
{
	DrawShadowText( indent, indent+spacing*1, "%d polys"        , TrisRendered(0) );
	DrawShadowText( indent, indent+spacing*2, "%d shadow polys" , TrisRendered(1) );
	MEMORYSTATUSEX statex;
	statex.dwLength = sizeof( statex );
	GlobalMemoryStatusEx( &statex );
	DrawShadowText( indent, indent+spacing*3, "Mem Free: %0.2f MB", (double)statex.ullAvailPhys/1024.0/1024.0 );
	HANDLE hProcess;
	hProcess = OpenProcess( PROCESS_QUERY_INFORMATION |
							PROCESS_VM_READ,
							FALSE, GetCurrentProcessId() );
	if (NULL != hProcess)
	{
		PROCESS_MEMORY_COUNTERS pmc;
		if ( GetProcessMemoryInfo( hProcess, &pmc, sizeof(pmc)) )
		{
			DrawShadowText( indent, indent+spacing*4, "Mem Used: %0.2f MB", (double)pmc.WorkingSetSize/1024.0/1024.0 );
		}
		CloseHandle( hProcess );
	}
}
SetBlend(0);
}

[Mumbles]

Here was me about to say something like:

 

"wrap malloc and free inside your own (de)allocation functions, which have a variable of how much memory you have allocated. Increased on allocation, decreased on deallocation"

 

A bit boring by comparison isn't it?

[paramecij]

I am using "->" because the compiler complains if I use ".". No idea why. This code causes a buffer overrun:

 

Because you are using a pointer - PPROCESS_MEMORY_COUNTERS - the first P stands for Pointer (general ms naming convention), if you look-up the definition of it you'll probably see it's defined as a pointer *PPROCES_....

[Josh]

Here was me about to say something like:

 

"wrap malloc and free inside your own (de)allocation functions, which have a variable of how much memory you have allocated. Increased on allocation, decreased on deallocation"

 

A bit boring by comparison isn't it?

And that works with precompiled third party libraries? B)

[Josh]

Hi, I am from the future. This is what I did:

//Exact memory usage, but only works in debug mode:
_CrtMemState memstate;
_CrtMemCheckpoint(&memstate);
//_CrtMemDumpStatistics(&memstate);
return memstate.lSizes[0] + memstate.lSizes[1] + memstate.lSizes[2] + memstate.lSizes[3] + memstate.lSizes[4];