Java GridUnsafe.copyMemory方法代码示例

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public void writeDoubleArray(double[] arr) throws IOException {
    writeInt(arr.length);

    int bytesToCp = arr.length << 3;

    requestFreeSize(bytesToCp);

    if (BIG_ENDIAN) {
        long off = BYTE_ARR_OFF + this.off;

        for (double val : arr) {
            GridUnsafe.putDoubleLE(bytes, off, val);

            off += 8;
        }
    }
    else
        GridUnsafe.copyMemory(arr, DOUBLE_ARR_OFF, bytes, BYTE_ARR_OFF + off, bytesToCp);

    onWrite(bytesToCp);
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public void writeCharArray(char[] arr) throws IOException {
    writeInt(arr.length);

    int bytesToCp = arr.length << 1;

    requestFreeSize(bytesToCp);

    if (BIG_ENDIAN) {
        long off = BYTE_ARR_OFF + this.off;

        for (char val : arr) {
            GridUnsafe.putCharLE(bytes, off, val);

            off += 2;
        }
    }
    else
        GridUnsafe.copyMemory(arr, CHAR_ARR_OFF, bytes, BYTE_ARR_OFF + off, bytesToCp);

    onWrite(bytesToCp);
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public void writeLongArray(long[] arr) throws IOException {
    writeInt(arr.length);

    int bytesToCp = arr.length << 3;

    requestFreeSize(bytesToCp);

    if (BIG_ENDIAN) {
        long off = BYTE_ARR_OFF + this.off;

        for (long val : arr) {
            GridUnsafe.putLongLE(bytes, off, val);

            off += 8;
        }
    }
    else
        GridUnsafe.copyMemory(arr, LONG_ARR_OFF, bytes, BYTE_ARR_OFF + off, bytesToCp);

    onWrite(bytesToCp);
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public void writeFloatArray(float[] arr) throws IOException {
    writeInt(arr.length);

    int bytesToCp = arr.length << 2;

    requestFreeSize(bytesToCp);

    if (BIG_ENDIAN) {
        long off = BYTE_ARR_OFF + this.off;

        for (float val : arr) {
            GridUnsafe.putFloatLE(bytes, off, val);

            off += 4;
        }
    }
    else
        GridUnsafe.copyMemory(arr, FLOAT_ARR_OFF, bytes, BYTE_ARR_OFF + off, bytesToCp);

    onWrite(bytesToCp);
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public void writeShortArray(short[] arr) throws IOException {
    writeInt(arr.length);

    int bytesToCp = arr.length << 1;

    requestFreeSize(bytesToCp);

    if (BIG_ENDIAN) {
        long off = BYTE_ARR_OFF + this.off;

        for (short val : arr) {
            GridUnsafe.putShortLE(bytes, off, val);

            off += 2;
        }
    }
    else
        GridUnsafe.copyMemory(arr, SHORT_ARR_OFF, bytes, BYTE_ARR_OFF + off, bytesToCp);

    onWrite(bytesToCp);
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public void writeIntArray(int[] arr) throws IOException {
    writeInt(arr.length);

    int bytesToCp = arr.length << 2;

    requestFreeSize(bytesToCp);

    if (BIG_ENDIAN) {
        long off = BYTE_ARR_OFF + this.off;

        for (int val : arr) {
            GridUnsafe.putIntLE(bytes, off, val);

            off += 4;
        }
    }
    else
        GridUnsafe.copyMemory(arr, INT_ARR_OFF, bytes, BYTE_ARR_OFF + off, bytesToCp);

    onWrite(bytesToCp);
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public short[] readShortArray() throws IOException {
    int arrSize = readInt();

    int bytesToCp = arrSize << 1;

    fromStream(bytesToCp);

    short[] arr = new short[arrSize];

    long off = BYTE_ARR_OFF + offset(bytesToCp);

    if (BIG_ENDIAN) {
        for (int i = 0; i < arr.length; i++) {
            arr[i] = GridUnsafe.getShortLE(buf, off);

            off += 2;
        }
    }
    else
        GridUnsafe.copyMemory(buf, off, arr, SHORT_ARR_OFF, bytesToCp);

    return arr;
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public int[] readIntArray() throws IOException {
    int arrSize = readInt();

    int bytesToCp = arrSize << 2;

    fromStream(bytesToCp);

    int[] arr = new int[arrSize];

    long off = BYTE_ARR_OFF + offset(bytesToCp);

    if (BIG_ENDIAN) {
        for (int i = 0; i < arr.length; i++) {
            arr[i] = GridUnsafe.getIntLE(buf, off);

            off += 4;
        }
    }
    else
        GridUnsafe.copyMemory(buf, off, arr, INT_ARR_OFF, bytesToCp);

    return arr;
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public double[] readDoubleArray() throws IOException {
    int arrSize = readInt();

    int bytesToCp = arrSize << 3;

    fromStream(bytesToCp);

    double[] arr = new double[arrSize];

    long off = BYTE_ARR_OFF + offset(bytesToCp);

    if (BIG_ENDIAN) {
        for (int i = 0; i < arr.length; i++) {
            arr[i] = GridUnsafe.getDoubleLE(buf, off);

            off += 8;
        }
    }
    else
        GridUnsafe.copyMemory(buf, off, arr, DOUBLE_ARR_OFF, bytesToCp);

    return arr;
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public char[] readCharArray() throws IOException {
    int arrSize = readInt();

    int bytesToCp = arrSize << 1;

    fromStream(bytesToCp);

    char[] arr = new char[arrSize];

    long off = BYTE_ARR_OFF + offset(bytesToCp);

    if (BIG_ENDIAN) {
        for (int i = 0; i < arr.length; i++) {
            arr[i] = GridUnsafe.getCharLE(buf, off);

            off += 2;
        }
    }
    else
        GridUnsafe.copyMemory(buf, off, arr, CHAR_ARR_OFF, bytesToCp);

    return arr;
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public long[] readLongArray() throws IOException {
    int arrSize = readInt();

    int bytesToCp = arrSize << 3;

    fromStream(bytesToCp);

    long[] arr = new long[arrSize];

    long off = BYTE_ARR_OFF + offset(bytesToCp);

    if (BIG_ENDIAN) {
        for (int i = 0; i < arr.length; i++) {
            arr[i] = GridUnsafe.getLongLE(buf, off);

            off += 8;
        }
    }
    else
        GridUnsafe.copyMemory(buf, off, arr, LONG_ARR_OFF, bytesToCp);

    return arr;
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/** {@inheritDoc} */
@Override public float[] readFloatArray() throws IOException {
    int arrSize = readInt();

    int bytesToCp = arrSize << 2;

    fromStream(bytesToCp);

    float[] arr = new float[arrSize];

    long off = BYTE_ARR_OFF + offset(bytesToCp);

    if (BIG_ENDIAN) {
        for (int i = 0; i < arr.length; i++) {
            arr[i] = GridUnsafe.getFloatLE(buf, off);

            off += 4;
        }
    }
    else
        GridUnsafe.copyMemory(buf, off, arr, FLOAT_ARR_OFF, bytesToCp);

    return arr;
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/**
 * @param src Source.
 * @param srcOff Source offset in bytes.
 * @param dst Destination.
 * @param dstOff Destination offset in bytes.
 * @param cnt Bytes count to copy.
 */
public static void copyMemory(ByteBuffer src, long srcOff, ByteBuffer dst, long dstOff, long cnt) {
    byte[] srcArr = src.hasArray() ? src.array() : null;
    byte[] dstArr = dst.hasArray() ? dst.array() : null;
    long srcArrOff = src.hasArray() ? src.arrayOffset() + GridUnsafe.BYTE_ARR_OFF : 0;
    long dstArrOff = dst.hasArray() ? dst.arrayOffset() + GridUnsafe.BYTE_ARR_OFF : 0;

    long srcPtr = src.isDirect() ? GridUnsafe.bufferAddress(src) : 0;
    long dstPtr = dst.isDirect() ? GridUnsafe.bufferAddress(dst) : 0;

    GridUnsafe.copyMemory(srcArr, srcPtr + srcArrOff + srcOff, dstArr, dstPtr + dstArrOff + dstOff, cnt);
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/**
 * @param fullPageId Full page ID.
 * @param ptr Pointer to copy from.
 * @param pageSize Page size.
 */
public PageSnapshot(FullPageId fullPageId, long ptr, int pageSize) {
    this.fullPageId = fullPageId;

    pageData = new byte[pageSize];

    GridUnsafe.copyMemory(null, ptr, pageData, GridUnsafe.BYTE_ARR_OFF, pageSize);
}
 

import org.apache.ignite.internal.util.GridUnsafe; //导入方法依赖的package包/类
/**
 * @param arr Array.
 * @param off Offset.
 * @return Value.
 */
public static char[] readCharArray(byte[] arr, int off, int len) {
    char[] arr0 = new char[len];

    GridUnsafe.copyMemory(arr, GridUnsafe.BYTE_ARR_OFF + off, arr0, GridUnsafe.CHAR_ARR_OFF, len << 1);

    if (BIG_ENDIAN) {
        for (int i = 0; i < len; i++)
            arr0[i] = Character.reverseBytes(arr0[i]);
    }

    return arr0;
}