Hi I have an issue in regards to memory allocation and freeing.

I am running the following code in a thread

public synchronized void run() {
        // int ss = -1;
        int count = 0;
        UInt32 numBytesInQueue = new UInt32(0);
        UInt32 queueStatus = new UInt32(USBXpressDLL.SI_SUCCESS);
        UInt32 numBytesToRead = new UInt32();
        AnsiString bs = new AnsiString();
        Pointer nbq = new Pointer(numBytesInQueue);
        Pointer qs = new Pointer(queueStatus);
        Pointer nbr = new Pointer(numBytesToRead);
        Pointer.Void voidptr = new Pointer.Void(0);
        byte[] databyteArray;
        // Step 1: get a Runtime object
 
        while (true) {
            if (this.readEnabled) {
 
 
                int ss = USBXpressDLL.SI_CheckRXQueue(this.handle, nbq, qs); //This function will start the memory jump
 
 
                ss = 1;
                if (ss == USBXpressDLL.SI_SUCCESS) {
                    if ((int) queueStatus.getValue() == USBXpressDLL.SI_RX_OVERRUN) {
                        ss = USBXpressDLL.SI_FlushBuffers(this.handle, (byte) 1, (byte) 1);
                        if (ss != USBXpressDLL.SI_SUCCESS) {
                            try {
                                throw new USBXpressException("Error Flushing Buffers"); //$NON-NLS-1$
                            } catch (USBXpressException e) {
                                e.printStackTrace();
                            }
                        }
                    } else {
                        if ((int) queueStatus.getValue() == USBXpressDLL.SI_RX_READY) {
                            bs = new AnsiString((int) numBytesInQueue.getValue());
                            DataBuffer ba;
                            ss = USBXpressDLL.SI_Read(this.handle, new Pointer(bs), numBytesInQueue, nbr, voidptr);
 
                            if (ss == USBXpressDLL.SI_SUCCESS) {
                                ba = bs.getDataBuffer();
                                databyteArray = ba.readByteArray(0, (int) (numBytesToRead.getValue()) - 1);
                                this.dispatch(databyteArray);
                            } else {
                                try {
                                    throw new USBXpressException("Error Reading"); //$NON-NLS-1$
                                } catch (USBXpressException e) {
                                    e.printStackTrace();
                                }
                            }
                        }
                        ;
                    }
                    ;
                } else {
                    try {
                        throw new USBXpressException("Error Reading RX Queue"); //$NON-NLS-1$
                    } catch (USBXpressException e) {
                        e.printStackTrace();
                    }
                }
            }
            try {
                Thread.sleep(this.readInterval);
            } catch (InterruptedException e) {
 
            }
            databyteArray = null;
        }
    }

This is calling the following functions

// function SI_CheckRXQueue (Handle: THandle; var NumBytesInQueue: dword;
    // var QueueStatus: dword): TSI_Status; stdcall external 'SiUSBXp.dll';
    public static int SI_CheckRXQueue(Handle handle, Pointer pointer, Pointer pointer2) {
        // System.out.println("SI_CheckRXQueue");
        int i = 0;
        Function add = USBXPRESS_LIB.getFunction(Messages.getString("USBXpressDLL.11")); //$NON-NLS-1$
        Int result = new Int();
        i = (int) result.getValue();
        add.invoke(result, handle, pointer, pointer2);
        add = null;
        result = null;
        add = null;
        return printReturnCode(i);
    }
 
 
    // function SI_FlushBuffers (Handle: THandle; FlushTransmit: byte;
    // FlushReceive: byte): TSI_Status; stdcall external 'SiUSBXp.dll';
    public static int SI_FlushBuffers(Handle handle, byte flushTransmit, byte flushReceive) {
        // System.out.println("SI_FlushBuffers");
        Function add = USBXPRESS_LIB.getFunction(Messages.getString("USBXpressDLL.13")); //$NON-NLS-1$
        Int result = new Int();
 
        add.invoke(result, handle, new UInt32(flushTransmit), new UInt32(flushReceive));
 
        int i = (int) result.getValue();
        add = null;
        result = null;
        return printReturnCode(i);
    }
 
 
    // function SI_Read (Handle: THandle; Buffer: LPVOID; NumBytesToRead: dword;
    // var NumBytesReturned: dword; lpOverlapped: POverlapped): TSI_Status;
    // stdcall external 'SiUSBXp.dll';
    public static int SI_Read(Handle handle, Pointer Buffer_LPVOID, UInt32 numBytesToRead, Pointer pointer2, Void void1) {
        // System.out.println("SI_Read");
        Function add = USBXPRESS_LIB.getFunction(Messages.getString("USBXpressDLL.15")); //$NON-NLS-1$
        Int result = new Int();
        Parameter[] params = { handle, Buffer_LPVOID, numBytesToRead, pointer2, void1 };
        add.invoke(result, params);
        // add.invoke(result,Handle_THandle,Buffer_LPVOID,NumBytesToWrite_dword,NumBytesReturned_dword,lpOverlapped_POverlapped);
        int i = (int) result.getValue();
        add = null;
        result = null;
        return printReturnCode(i);
    }

I am succesfully reading data from USBXpress device but I am noticing a considerable jump(16K-100K) in memory every time I run this thread. Which by the way is being called every 20ms. which means approx 1MB per minute.

I need to be able to run this thread over 1-2weeks. but since I am having this memory issue the thread would only run overnight.

I would love your input on the matter.

I have been stumped on how I would fix this issue as I am not sure if this is a memory leak in java or the dll.