Examples with ByteBuffer java.nio.ByteBuffer used on opensource projects

Example 56 with ByteBuffer

use of java.nio.ByteBuffer in project jvm-tools by aragozin.

the class ByteBufferPageManager method accurePage.

@Override
public ByteBuffer accurePage() throws NoMorePagesException {
    if (freePages.isEmpty()) {
        refill();
    }
    if (freePages.isEmpty()) {
        throw new NoMorePagesException();
    }
    Iterator<BW> it = freePages.iterator();
    ByteBuffer bb = it.next().pageBuffer;
    it.remove();
    return bb;
}

Example 57 with ByteBuffer

use of java.nio.ByteBuffer in project jvm-tools by aragozin.

the class PagedVirtualMemory method ensureBuffer.

private ByteBuffer ensureBuffer(long index) {
    if (index > SANITY_LIMIT) {
        throw new IllegalArgumentException("Offset beyond sanity: " + index);
    }
    int n = (int) (index >> pageBits);
    if (n >= bufferMap.length) {
        int nsize = Math.max(n + 1, (3 * bufferMap.length) / 4);
        bufferMap = Arrays.copyOf(bufferMap, nsize);
        hitCounts = Arrays.copyOf(hitCounts, nsize);
        pageMap = Arrays.copyOf(pageMap, nsize);
    }
    ByteBuffer b = bufferMap[n];
    if (b == null) {
        pageFault(n);
        b = bufferMap[n];
        if (b == null) {
            throw new IllegalArgumentException("Failed to load page #" + n);
        }
    }
    return b;
}

Example 58 with ByteBuffer

use of java.nio.ByteBuffer in project disunity by ata4.

the class SerializedFileReader method readObjects.

private void readObjects(DataReader in) throws IOException {
    long ofsMin = Long.MAX_VALUE;
    long ofsMax = Long.MIN_VALUE;
    SerializedFileHeader header = serialized.header();
    SerializedFileMetadata metadata = serialized.metadata();
    Map<Long, ObjectInfo> objectInfoMap = metadata.objectInfoTable().infoMap();
    Map<Integer, TypeRoot<Type>> typeTreeMap = metadata.typeTree().typeMap();
    List<SerializedObjectData> objectData = serialized.objectData();
    for (Map.Entry<Long, ObjectInfo> infoEntry : objectInfoMap.entrySet()) {
        ObjectInfo info = infoEntry.getValue();
        long id = infoEntry.getKey();
        long ofs = header.dataOffset() + info.offset();
        ofsMin = Math.min(ofsMin, ofs);
        ofsMax = Math.max(ofsMax, ofs + info.length());
        SerializedObjectData object = new SerializedObjectData(id);
        object.info(info);
        // create and read object data buffer
        ByteBuffer buf = ByteBufferUtils.allocate((int) info.length());
        in.position(ofs);
        in.readBuffer(buf);
        object.buffer(buf);
        // get type tree if possible
        TypeRoot typeRoot = typeTreeMap.get(info.typeID());
        if (typeRoot != null) {
            object.typeTree(typeRoot.nodes());
        }
        objectData.add(object);
    }
    DataBlock objectDataBlock = serialized.objectDataBlock();
    objectDataBlock.offset(ofsMin);
    objectDataBlock.endOffset(ofsMax);
    L.log(Level.FINER, "objectDataBlock: {0}", objectDataBlock);
}

Example 59 with ByteBuffer

use of java.nio.ByteBuffer in project disunity by ata4.

the class SerializedFileWriter method writeObjects.

private void writeObjects(DataWriter out) throws IOException {
    long ofsMin = Long.MAX_VALUE;
    long ofsMax = Long.MIN_VALUE;
    for (SerializedObjectData data : serialized.objectData()) {
        ByteBuffer bb = data.buffer();
        bb.rewind();
        out.align(8);
        ofsMin = Math.min(ofsMin, out.position());
        ofsMax = Math.max(ofsMax, out.position() + bb.remaining());
        ObjectInfo info = data.info();
        info.offset(out.position() - serialized.header().dataOffset());
        info.length(bb.remaining());
        out.writeBuffer(bb);
    }
    DataBlock objectDataBlock = serialized.objectDataBlock();
    objectDataBlock.offset(ofsMin);
    objectDataBlock.endOffset(ofsMax);
    L.log(Level.FINER, "objectDataBlock: {0}", objectDataBlock);
}

Example 60 with ByteBuffer

use of java.nio.ByteBuffer in project bazel by bazelbuild.

the class CentralDirectoryTest method testParse.

/**
   * Test of parse method, of class CentralDirectory.
   */
@Test
public void testParse() {
    // First fill it with some entries
    ByteBuffer inputBuffer = ByteBuffer.allocate(10000).order(ByteOrder.LITTLE_ENDIAN);
    String comment = null;
    byte[] extra = null;
    String filename = "pkg/0.txt";
    DirectoryEntry entry = DirectoryEntry.view(inputBuffer, filename, extra, comment);
    int expSize = entry.getSize();
    comment = "";
    extra = new byte[] {};
    for (int i = 1; i < 20; i++) {
        filename = "pkg/" + i + ".txt";
        entry = DirectoryEntry.view(inputBuffer, filename, extra, comment);
        expSize += entry.getSize();
        extra = new byte[extra.length + 1];
        comment = comment + "," + i;
    }
    // Parse the entries.
    CentralDirectory cdir = CentralDirectory.viewOf(inputBuffer).at(0).parse();
    assertEquals("Count", 20, cdir.getCount());
    assertEquals("Position after parse", expSize, cdir.buffer.position());
    assertEquals("Limit after parse", 10000, cdir.buffer.limit());
    cdir.buffer.flip();
    assertEquals("Position after finish", 0, cdir.buffer.position());
    assertEquals("Limit after finish", expSize, cdir.buffer.limit());
}