@Test
public void simpleWriteRead() {
byte primaryRingSizeInBits = 9;
byte byteRingSizeInBits = 18;
Pipe ring = new Pipe(new PipeConfig(primaryRingSizeInBits, byteRingSizeInBits, null, FROM));
ring.initBuffers();
int messageSize = FROM.fragDataSize[FRAG_LOC];
int varDataMax = (ring.byteMask / (ring.mask >> 1)) / messageSize;
int testSize = ((1 << primaryRingSizeInBits) / messageSize) - 1; // room for EOF
writeTestValue(ring, varDataMax, testSize);
// now read the data back
int FIELD_LOC =
FieldReferenceOffsetManager.lookupFieldLocator(SINGLE_MESSAGE_NAMES[0], FRAG_LOC, FROM);
int k = testSize;
while (PipeReader.tryReadFragment(ring)) {
--k;
assertTrue(PipeReader.isNewMessage(ring));
int messageIdx = PipeReader.getMsgIdx(ring);
if (messageIdx < 0) {
return;
}
testReadValue(ring, varDataMax, testSize, FIELD_LOC, k, messageIdx);
}
}
@Test
public void simpleWriteReadThreaded() {
final byte primaryRingSizeInBits = 7; // this ring is 2^7 eg 128
final byte byteRingSizeInBits = 16;
final Pipe ring =
new Pipe(new PipeConfig(primaryRingSizeInBits, byteRingSizeInBits, null, FROM));
ring.initBuffers();
final int messageSize = FROM.fragDataSize[FRAG_LOC];
final int varDataMax = (ring.byteMask / (ring.mask >> 1)) / messageSize;
final int testSize = (1 << primaryRingSizeInBits) / messageSize;
Thread t =
new Thread(
new Runnable() {
@Override
public void run() {
writeTestValue(ring, varDataMax, testSize);
}
});
t.start();
// now read the data back
int FIELD_LOC =
FieldReferenceOffsetManager.lookupFieldLocator(SINGLE_MESSAGE_NAMES[0], FRAG_LOC, FROM);
int k = testSize;
while (k > 0) {
// This is the example code that one would normally use.
// System.err.println("content "+ring.contentRemaining(ring));
if (PipeReader.tryReadFragment(
ring)) { // this method releases old messages as needed and moves pointer up to the next
// fragment
k--; // count down all the expected messages so we stop this test at the right time
assertTrue(PipeReader.isNewMessage(ring));
int messageIdx = PipeReader.getMsgIdx(ring);
if (messageIdx < 0) {
return;
}
testReadValue(ring, varDataMax, testSize, FIELD_LOC, k, messageIdx);
} else {
// unable to read so at this point
// we can do other work and try again soon
Thread.yield();
}
}
}
private void testReadValue(
Pipe ring, int varDataMax, int testSize, int FIELD_LOC, int k, int messageIdx) {
assertEquals(0, messageIdx);
float expectedValue = 1f / (float) ((varDataMax * (k)) / testSize);
float value = PipeReader.readIntBitsToFloat(ring, FIELD_LOC);
assertEquals(expectedValue, value, .00001);
}