testDirectArenaMemoryCopy() — netty Function Reference

Architecture documentation for the testDirectArenaMemoryCopy() function in PoolArenaTest.java from the netty codebase.

Function java Buffer Allocators calls 1

Entity Profile

Buffer→ Allocators→ testDirectArenaMemoryCopy() — netty Function Reference

Dependency Diagram

graph TD
  bcde9f30_8a41_83f5_9605_c2b8533fd9eb["testDirectArenaMemoryCopy()"]
  a309ea5f_39fd_34ca_b674_7a5f76e6b7eb["PoolArenaTest"]
  bcde9f30_8a41_83f5_9605_c2b8533fd9eb -->|defined in| a309ea5f_39fd_34ca_b674_7a5f76e6b7eb
  e2f1cf7b_9cd4_5cac_c4f4_d7df028b810f["unwrapIfNeeded()"]
  bcde9f30_8a41_83f5_9605_c2b8533fd9eb -->|calls| e2f1cf7b_9cd4_5cac_c4f4_d7df028b810f
  style bcde9f30_8a41_83f5_9605_c2b8533fd9eb fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

buffer/src/test/java/io/netty/buffer/PoolArenaTest.java lines 155–170

    @Test
    public void testDirectArenaMemoryCopy() {
        ByteBuf src = PooledByteBufAllocator.DEFAULT.directBuffer(512);
        ByteBuf dst = PooledByteBufAllocator.DEFAULT.directBuffer(512);

        PooledByteBuf<ByteBuffer> pooledSrc = unwrapIfNeeded(src);
        PooledByteBuf<ByteBuffer> pooledDst = unwrapIfNeeded(dst);

        // This causes the internal reused ByteBuffer duplicate limit to be set to 128
        pooledDst.writeBytes(ByteBuffer.allocate(128));
        // Ensure internal ByteBuffer duplicate limit is properly reset (used in memoryCopy non-Unsafe case)
        pooledDst.chunk.arena.memoryCopy(pooledSrc.memory, 0, pooledDst, 512);

        src.release();
        dst.release();
    }