freeChunk() — netty Function Reference

Architecture documentation for the freeChunk() function in PoolArena.java from the netty codebase.

Function java Buffer Search calls 4 called by 1

Entity Profile

Buffer→ Search→ freeChunk() — netty Function Reference

Dependency Diagram

graph TD
  49dbf789_be1b_69c7_042a_27d74a8c475d["freeChunk()"]
  de926ba9_75e3_c416_27fc_3623234991a8["PoolArena"]
  49dbf789_be1b_69c7_042a_27d74a8c475d -->|defined in| de926ba9_75e3_c416_27fc_3623234991a8
  1eb7867b_3257_ad29_cda0_1b8484056b67["free()"]
  1eb7867b_3257_ad29_cda0_1b8484056b67 -->|calls| 49dbf789_be1b_69c7_042a_27d74a8c475d
  a9955d3f_a5f7_e9ad_827d_87d47e26b575["lock()"]
  49dbf789_be1b_69c7_042a_27d74a8c475d -->|calls| a9955d3f_a5f7_e9ad_827d_87d47e26b575
  1eb7867b_3257_ad29_cda0_1b8484056b67["free()"]
  49dbf789_be1b_69c7_042a_27d74a8c475d -->|calls| 1eb7867b_3257_ad29_cda0_1b8484056b67
  c24c38bc_94a5_6dd7_1e0a_4abbf00b61e7["unlock()"]
  49dbf789_be1b_69c7_042a_27d74a8c475d -->|calls| c24c38bc_94a5_6dd7_1e0a_4abbf00b61e7
  ae1f5354_6c2b_3fd8_c85d_14af9d52df05["destroyChunk()"]
  49dbf789_be1b_69c7_042a_27d74a8c475d -->|calls| ae1f5354_6c2b_3fd8_c85d_14af9d52df05
  style 49dbf789_be1b_69c7_042a_27d74a8c475d fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

buffer/src/main/java/io/netty/buffer/PoolArena.java lines 259–290

    void freeChunk(PoolChunk<T> chunk, long handle, int normCapacity, SizeClass sizeClass, ByteBuffer nioBuffer,
                   boolean finalizer) {
        final boolean destroyChunk;
        lock();
        try {
            // We only call this if freeChunk is not called because of the PoolThreadCache finalizer as otherwise this
            // may fail due lazy class-loading in for example tomcat.
            if (!finalizer) {
                switch (sizeClass) {
                    case Normal:
                        ++deallocationsNormal;
                        break;
                    case Small:
                        ++deallocationsSmall;
                        break;
                    default:
                        throw new Error("Unexpected size class: " + sizeClass);
                }
            }
            destroyChunk = !chunk.parent.free(chunk, handle, normCapacity, nioBuffer);
            if (destroyChunk) {
                // all other destroyChunk calls come from the arena itself being finalized, so don't need to be counted
                ++pooledChunkDeallocations;
            }
        } finally {
            unlock();
        }
        if (destroyChunk) {
            // destroyChunk not need to be called while holding the synchronized lock.
            destroyChunk(chunk);
        }
    }