Examples with Memory net.openhft.chronicle.core.Memory used on opensource projects

Example 16 with Memory

use of net.openhft.chronicle.core.Memory in project Chronicle-Bytes by OpenHFT.

the class MappedBytes method append8bit0.

@NotNull
private MappedBytes append8bit0(@NotNull String s, int start, int length) throws BufferOverflowException {
    assert singleThreadedAccess();
    if (Jvm.isJava9Plus()) {
        byte[] bytes = extractBytes(s);
        long address = addressForWrite(writePosition());
        Memory memory = bytesStore().memory;
        int i = 0;
        for (; i < length - 3; i += 4) {
            int c0 = bytes[i + start] & 0xff;
            int c1 = bytes[i + start + 1] & 0xff;
            int c2 = bytes[i + start + 2] & 0xff;
            int c3 = bytes[i + start + 3] & 0xff;
            memory.writeInt(address, (c3 << 24) | (c2 << 16) | (c1 << 8) | c0);
            address += 4;
        }
        for (; i < length; i++) {
            byte c = bytes[i + start];
            memory.writeByte(address++, c);
        }
        writeSkip(length);
    } else {
        char[] chars = extractChars(s);
        long address = addressForWrite(writePosition());
        Memory memory = bytesStore().memory;
        int i = 0;
        for (; i < length - 3; i += 4) {
            int c0 = chars[i + start] & 0xff;
            int c1 = chars[i + start + 1] & 0xff;
            int c2 = chars[i + start + 2] & 0xff;
            int c3 = chars[i + start + 3] & 0xff;
            memory.writeInt(address, (c3 << 24) | (c2 << 16) | (c1 << 8) | c0);
            address += 4;
        }
        for (; i < length; i++) {
            char c = chars[i + start];
            memory.writeByte(address++, (byte) c);
        }
        writeSkip(length);
    }
    return this;
}

Example 17 with Memory

use of net.openhft.chronicle.core.Memory in project Chronicle-Bytes by OpenHFT.

the class MappedBytes method peekVolatileInt.

@Override
public int peekVolatileInt() {
    if (!bytesStore.inside(readPosition)) {
        acquireNextByteStore(readPosition, true);
    }
    @Nullable MappedBytesStore bytesStore = (MappedBytesStore) (BytesStore) this.bytesStore;
    long address = bytesStore.address + bytesStore.translate(readPosition);
    @Nullable Memory memory = bytesStore.memory;
    // are we inside a cache line?
    if ((address & 63) <= 60) {
        // if (memory == null) throw new NullPointerException();
        // faster check for null.
        memory.getClass();
        return UnsafeMemory.UNSAFE.getIntVolatile(null, address);
    } else {
        return memory.readVolatileInt(address);
    }
}