Examples with NativeScopedBuffer org.neo4j.io.memory.NativeScopedBuffer used on opensource projects

Example 6 with NativeScopedBuffer

use of org.neo4j.io.memory.NativeScopedBuffer in project neo4j by neo4j.

the class PhysicalFlushableChannelTest method shouldSeeCorrectPositionEvenBeforeEmptyingDataIntoChannel.

@Test
void shouldSeeCorrectPositionEvenBeforeEmptyingDataIntoChannel() throws Exception {
    // GIVEN
    final Path file = directory.homePath().resolve("file");
    StoreChannel storeChannel = fileSystem.write(file);
    PhysicalLogVersionedStoreChannel versionedStoreChannel = new PhysicalLogVersionedStoreChannel(storeChannel, 1, (byte) -1, file, nativeChannelAccessor);
    PositionAwarePhysicalFlushableChecksumChannel channel = new PositionAwarePhysicalFlushableChecksumChannel(versionedStoreChannel, new NativeScopedBuffer(1024, INSTANCE));
    LogPosition initialPosition = channel.getCurrentPosition();
    // WHEN
    channel.putLong(67);
    channel.putInt(1234);
    LogPosition positionAfterSomeData = channel.getCurrentPosition();
    // THEN
    assertEquals(12, positionAfterSomeData.getByteOffset() - initialPosition.getByteOffset());
    channel.close();
}

Example 7 with NativeScopedBuffer

use of org.neo4j.io.memory.NativeScopedBuffer in project neo4j by neo4j.

the class UnsafeDirectByteBufferAllocator method allocate.

@Override
public synchronized ScopedBuffer allocate(int bufferSize, MemoryTracker memoryTracker) {
    assertOpen();
    try {
        var byteBuffer = new NativeScopedBuffer(bufferSize, memoryTracker);
        allocations.add(byteBuffer);
        return byteBuffer;
    } catch (NativeMemoryAllocationRefusedError allocationRefusedError) {
        // What ever went wrong fallback to on-heap buffer.
        return new HeapScopedBuffer(bufferSize, memoryTracker);
    }
}