30 import java.nio.Buffer;
31 import java.nio.ByteBuffer;
32
33 public interface JavaNioAccess {
34 /**
35 * Provides access to information on buffer usage.
36 */
37 interface BufferPool {
38 String getName();
39 long getCount();
40 long getTotalCapacity();
41 long getMemoryUsed();
42 }
43 BufferPool getDirectBufferPool();
44
45 /**
46 * Constructs a direct ByteBuffer referring to the block of memory starting
47 * at the given memory address and extending {@code cap} bytes.
48 * The {@code ob} parameter is an arbitrary object that is attached
49 * to the resulting buffer.
50 */
51 ByteBuffer newDirectByteBuffer(long addr, int cap, Object ob, MemorySegmentProxy segment);
52
53 /**
54 * Constructs an heap ByteBuffer with given backing array, offset, capacity and segment.
55 */
56 ByteBuffer newHeapByteBuffer(byte[] hb, int offset, int capacity, MemorySegmentProxy segment);
57
58 Object getBufferBase(ByteBuffer bb);
59
60 long getBufferAddress(ByteBuffer bb);
61
62 void checkSegment(Buffer buffer);
63 }
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30 import java.nio.Buffer;
31 import java.nio.ByteBuffer;
32
33 public interface JavaNioAccess {
34 /**
35 * Provides access to information on buffer usage.
36 */
37 interface BufferPool {
38 String getName();
39 long getCount();
40 long getTotalCapacity();
41 long getMemoryUsed();
42 }
43 BufferPool getDirectBufferPool();
44
45 /**
46 * Constructs a direct ByteBuffer referring to the block of memory starting
47 * at the given memory address and extending {@code cap} bytes.
48 * The {@code ob} parameter is an arbitrary object that is attached
49 * to the resulting buffer.
50 * Used by {@code jdk.internal.foreignMemorySegmentImpl}.
51 */
52 ByteBuffer newDirectByteBuffer(long addr, int cap, Object obj, MemorySegmentProxy segment);
53
54 /**
55 * Constructs an heap ByteBuffer with given backing array, offset, capacity and segment.
56 * Used by {@code jdk.internal.foreignMemorySegmentImpl}.
57 */
58 ByteBuffer newHeapByteBuffer(byte[] hb, int offset, int capacity, MemorySegmentProxy segment);
59
60 /**
61 * Used by {@code jdk.internal.foreign.Utils}.
62 */
63 Object getBufferBase(ByteBuffer bb);
64
65 /**
66 * Used by {@code jdk.internal.foreign.Utils}.
67 */
68 long getBufferAddress(ByteBuffer bb);
69
70 /**
71 * Used by byte buffer var handle views.
72 */
73 void checkSegment(Buffer buffer);
74 }
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