realloc() — netty Function Reference

Architecture documentation for the realloc() function in KQueueEventArray.java from the netty codebase.

Function java Buffer Search calls 2 called by 1

Entity Profile

Buffer→ Search→ realloc() — netty Function Reference

Dependency Diagram

graph TD
  12daeba4_d43b_3906_87d8_7fd36d2c180c["realloc()"]
  43377ca2_4201_bd6f_4ef1_60f1c213f5b8["KQueueEventArray"]
  12daeba4_d43b_3906_87d8_7fd36d2c180c -->|defined in| 43377ca2_4201_bd6f_4ef1_60f1c213f5b8
  a1b74c4f_782b_17ec_ce12_454a1941b54e["reallocIfNeeded()"]
  a1b74c4f_782b_17ec_ce12_454a1941b54e -->|calls| 12daeba4_d43b_3906_87d8_7fd36d2c180c
  7961ca17_85c8_dffa_200d_db4a49163083["calculateBufferCapacity()"]
  12daeba4_d43b_3906_87d8_7fd36d2c180c -->|calls| 7961ca17_85c8_dffa_200d_db4a49163083
  bd9f9cf8_bce0_44d0_2739_c95afb0494e6["memoryAddress()"]
  12daeba4_d43b_3906_87d8_7fd36d2c180c -->|calls| bd9f9cf8_bce0_44d0_2739_c95afb0494e6
  style 12daeba4_d43b_3906_87d8_7fd36d2c180c fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

transport-classes-kqueue/src/main/java/io/netty/channel/kqueue/KQueueEventArray.java lines 100–125

    void realloc(boolean throwIfFail) {
        // Double the capacity while it is "sufficiently small", and otherwise increase by 50%.
        int newLength = capacity <= 65536 ? capacity << 1 : capacity + capacity >> 1;

        try {
            int newCapacity = calculateBufferCapacity(newLength);
            CleanableDirectBuffer buffer = Buffer.allocateDirectBufferWithNativeOrder(newCapacity);
            // Copy over the old content of the memory and reset the position as we always act on the buffer as if
            // the position was never increased.
            memory.position(0).limit(size);
            buffer.buffer().put(memory);
            buffer.buffer().position(0);

            memoryCleanable.clean();
            memoryCleanable = buffer;
            memory = buffer.buffer();
            memoryAddress = Buffer.memoryAddress(memory);
        } catch (OutOfMemoryError e) {
            if (throwIfFail) {
                OutOfMemoryError error = new OutOfMemoryError(
                        "unable to allocate " + newLength + " new bytes! Existing capacity is: " + capacity);
                error.initCause(e);
                throw error;
            }
        }
    }