@Test
public void bufferWithHostPointerTest() {
out.println(" - - - highLevelTest; host pointer test - - - ");
final int elements = NUM_ELEMENTS;
final CLContext context = CLContext.create();
final ByteBuffer buffer = Buffers.newDirectByteBuffer(elements * SIZEOF_INT);
// fill only first read buffer -> we will copy the payload to the second later.
fillBuffer(buffer, 12345);
final CLCommandQueue queue = context.getDevices()[0].createCommandQueue();
final Mem[] bufferConfig = new Mem[] {Mem.COPY_BUFFER, Mem.USE_BUFFER};
for (int i = 0; i < bufferConfig.length; i++) {
out.println("testing with " + bufferConfig[i] + " config");
final CLBuffer<ByteBuffer> clBufferA =
context.createBuffer(buffer, Mem.READ_ONLY, bufferConfig[i]);
final CLBuffer<ByteBuffer> clBufferB =
context.createByteBuffer(elements * SIZEOF_INT, Mem.READ_ONLY);
// asynchronous write of data to GPU device, blocking read later to get the computed results
// back.
queue
.putCopyBuffer(clBufferA, clBufferB, clBufferA.buffer.capacity()) // copy A -> B
.putReadBuffer(clBufferB, true) // read B
.finish();
assertEquals(2, context.getMemoryObjects().size());
clBufferA.release();
assertEquals(1, context.getMemoryObjects().size());
clBufferB.release();
assertEquals(0, context.getMemoryObjects().size());
// uploading worked when a==b.
out.println("validating computed results...");
checkIfEqual(clBufferA.buffer, clBufferB.buffer, elements);
out.println("results are valid");
}
context.release();
}
