numAvailable() — netty Function Reference

Architecture documentation for the numAvailable() function in PoolSubpage.java from the netty codebase.

Function java Buffer Telemetry calls 2

Entity Profile

Buffer→ Telemetry→ numAvailable() — netty Function Reference

Dependency Diagram

graph TD
  72308e0f_b202_7963_ba3d_96078a06bcd6["numAvailable()"]
  a6a571ea_fcf9_6eda_c073_f8d61fa999a3["PoolSubpage"]
  72308e0f_b202_7963_ba3d_96078a06bcd6 -->|defined in| a6a571ea_fcf9_6eda_c073_f8d61fa999a3
  8430ff84_07e1_7071_2284_67c0376a0787["lock()"]
  72308e0f_b202_7963_ba3d_96078a06bcd6 -->|calls| 8430ff84_07e1_7071_2284_67c0376a0787
  16244a67_1ca6_10f2_7f85_bae2df13ecc1["unlock()"]
  72308e0f_b202_7963_ba3d_96078a06bcd6 -->|calls| 16244a67_1ca6_10f2_7f85_bae2df13ecc1
  style 72308e0f_b202_7963_ba3d_96078a06bcd6 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

buffer/src/main/java/io/netty/buffer/PoolSubpage.java lines 248–261

    @Override
    public int numAvailable() {
        if (chunk == null) {
            // It's the head.
            return 0;
        }
        PoolSubpage<T> head = chunk.arena.smallSubpagePools[headIndex];
        head.lock();
        try {
            return numAvail;
        } finally {
            head.unlock();
        }
    }