C++: Future Directions in Language Innovation

Example: Average-Neighbors

OpenMP code (example a1):

#pragma omp parallel for
for( i=1; i < n; ++i )
b[i] = (a[i] + a[i-1]) / 2.0;

Explicit Windows threads code:

DWORD ThreadFn( VOID* pData ) { // primary function
for( int i = pData->Start; i < pData->Stop; ++i )
b[i] = (a[i] + a[i-1]) / 2.0;
return 0;
}

for( int i=0; i < n; ++i ) // create thread team
hTeam[i] = CreateThread( 0, 0, ThreadFn, pDataN, 0, 0 );

WaitForMultipleObjects( n, hTeam, TRUE, INFINITE );
// wait until done

for( int i=0; i < n; ++i ) // clean up
CloseHandle( hTeam[i] );