I should have been more explicit. You need to dynamically load this function in order for it to work - it is not included in any exported headers. This code is written for a C++ compiler, but it's an example of how to do what you want to do.
struct RTMemStats {
unsigned int numBytesAllocated;
unsigned int numBytesFree;
unsigned int maxFreeBlockSize;
};
__declspec(dllexport) int __cdecl printFreeMemory( void )
{
typedef unsigned int (*tGetRTMemStatsFunc)(RTMemStats *memStats);
HMODULE handle = LoadLibrary( "ni_emb.dll" );
if( !handle )
{
printf( "ni_emb.dll failed to load!\n" );
return -1;
}
tGetRTMemStatsFunc myfunc = (tGetRTMemStatsFunc) GetProcAddress( handle, "GetRTMemStats" );
if( !myfunc)
{
printf( "GetRTMemStats not found in ni_emb.dll!\n" );
return -2;
}
struct RTMemStats myRTMemStats;
myfunc( &myRTMemStats );
printf( "The system has 0x%x bytes free!\n", myRTMemStats.numBytesFree );
FreeLibrary( handle );
return 0;
}
The process is the same for the CPU Utilization function, too. Remember that ni_emb.dll is a "ghost" DLL on PharLap-based targets; you won't find it in the file system, but if you attempt to load the library from within LoadLibrary it will succeed - this is because ni_emb is cleverly hidden within the ph_exec.exe component (required by the system to exist) so that it's always guaranteed to be present on the system.
If you're getting a protection fault, that's probably because you used a NULL pointer as one of the input parameters. All of the pointers have to be good, you cannot use NULL for any of the pointers.
I'm sure if you thought about that for a few more minutes you'll come up with your answer - if you add up all the values, what do you get? Remember, those values represent ALL of the CPUs in the system (if there are multiple cores) and in those values is an idle amount (how much of the CPU is not being used); the rest of the values represent components of the CPU "usage". I'll leave the math as an exercise to the reader.
