parallel processing

guyz i use a quad core processor( dual core pentium and NVidia graphic card)....in my program i generate signals and give them as inputs to two other programs( which are processing blocks in my model) , now i want to run these processing blocks simultaneously as the signals are being generated (like in real time , not the signals being generated first and given as inputs) , also i want run the processing blocks in parallel , by utilizing my processors(both the processing blocks are independent of each other)...can anyone help me out here??