free() — netty Function Reference

Architecture documentation for the free() function in PoolThreadCache.java from the netty codebase.

Function java Buffer Search calls 1 called by 3

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Buffer→ Search→ free() — netty Function Reference

Dependency Diagram

graph TD
  67fe01c2_aedc_a81c_c637_b03b96610998["free()"]
  f4c407ea_9e8c_d00d_ea7e_e355c94f8aba["PoolThreadCache"]
  67fe01c2_aedc_a81c_c637_b03b96610998 -->|defined in| f4c407ea_9e8c_d00d_ea7e_e355c94f8aba
  81ffb468_a88d_4b96_03a3_87154836c556["free()"]
  81ffb468_a88d_4b96_03a3_87154836c556 -->|calls| 67fe01c2_aedc_a81c_c637_b03b96610998
  562c77b5_107e_e3e8_4481_0717613d42f3["trim()"]
  562c77b5_107e_e3e8_4481_0717613d42f3 -->|calls| 67fe01c2_aedc_a81c_c637_b03b96610998
  6a490f6b_0a0e_531d_db52_9bb29522c8ab["finalize()"]
  6a490f6b_0a0e_531d_db52_9bb29522c8ab -->|calls| 67fe01c2_aedc_a81c_c637_b03b96610998
  81ffb468_a88d_4b96_03a3_87154836c556["free()"]
  67fe01c2_aedc_a81c_c637_b03b96610998 -->|calls| 81ffb468_a88d_4b96_03a3_87154836c556
  style 67fe01c2_aedc_a81c_c637_b03b96610998 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

buffer/src/main/java/io/netty/buffer/PoolThreadCache.java lines 203–229

    void free(boolean finalizer) {
        // As free() may be called either by the finalizer or by FastThreadLocal.onRemoval(...) we need to ensure
        // we only call this one time.
        if (freed.compareAndSet(false, true)) {
            if (freeOnFinalize != null) {
                // Help GC: this can race with a finalizer thread, but will be null out regardless
                freeOnFinalize.cache = null;
            }
            int numFreed = free(smallSubPageDirectCaches, finalizer) +
                           free(normalDirectCaches, finalizer) +
                           free(smallSubPageHeapCaches, finalizer) +
                           free(normalHeapCaches, finalizer);

            if (numFreed > 0 && logger.isDebugEnabled()) {
                logger.debug("Freed {} thread-local buffer(s) from thread: {}", numFreed,
                             Thread.currentThread().getName());
            }

            if (directArena != null) {
                directArena.numThreadCaches.getAndDecrement();
            }

            if (heapArena != null) {
                heapArena.numThreadCaches.getAndDecrement();
            }
        }
    }