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allocateSubpage() — netty Function Reference

Architecture documentation for the allocateSubpage() function in PoolChunk.java from the netty codebase.

Function java Buffer Search calls 5 called by 1

Entity Profile

Dependency Diagram

graph TD
  de510c10_913b_9792_3aa7_159e623d5dd8["allocateSubpage()"]
  271be16e_fb25_9fe6_0749_cf5dd80dd903["PoolChunk"]
  de510c10_913b_9792_3aa7_159e623d5dd8 -->|defined in| 271be16e_fb25_9fe6_0749_cf5dd80dd903
  dc4b66ae_8f51_844d_74c5_b56fbafe898a["allocate()"]
  dc4b66ae_8f51_844d_74c5_b56fbafe898a -->|calls| de510c10_913b_9792_3aa7_159e623d5dd8
  f05ef488_130c_6bae_ae66_5e07522e80f9["calculateRunSize()"]
  de510c10_913b_9792_3aa7_159e623d5dd8 -->|calls| f05ef488_130c_6bae_ae66_5e07522e80f9
  ff51bcad_2a8e_9ef1_b286_8e676953d24e["allocateRun()"]
  de510c10_913b_9792_3aa7_159e623d5dd8 -->|calls| ff51bcad_2a8e_9ef1_b286_8e676953d24e
  22016f68_b853_63ea_32c8_c288b8996440["runOffset()"]
  de510c10_913b_9792_3aa7_159e623d5dd8 -->|calls| 22016f68_b853_63ea_32c8_c288b8996440
  1bdfe3f7_3884_814f_0eb6_924b6a843c79["runSize()"]
  de510c10_913b_9792_3aa7_159e623d5dd8 -->|calls| 1bdfe3f7_3884_814f_0eb6_924b6a843c79
  dc4b66ae_8f51_844d_74c5_b56fbafe898a["allocate()"]
  de510c10_913b_9792_3aa7_159e623d5dd8 -->|calls| dc4b66ae_8f51_844d_74c5_b56fbafe898a
  style de510c10_913b_9792_3aa7_159e623d5dd8 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

buffer/src/main/java/io/netty/buffer/PoolChunk.java lines 473–491

    private long allocateSubpage(int sizeIdx, PoolSubpage<T> head) {
        //allocate a new run
        int runSize = calculateRunSize(sizeIdx);
        //runSize must be multiples of pageSize
        long runHandle = allocateRun(runSize);
        if (runHandle < 0) {
            return -1;
        }

        int runOffset = runOffset(runHandle);
        assert subpages[runOffset] == null;
        int elemSize = arena.sizeClass.sizeIdx2size(sizeIdx);

        PoolSubpage<T> subpage = new PoolSubpage<T>(head, this, pageShifts, runOffset,
                runSize(pageShifts, runHandle), elemSize);

        subpages[runOffset] = subpage;
        return subpage.allocate();
    }

Domain

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Defined In

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Called By

Source

Frequently Asked Questions

What does allocateSubpage() do?
allocateSubpage() is a function in the netty codebase, defined in buffer/src/main/java/io/netty/buffer/PoolChunk.java.
Where is allocateSubpage() defined?
allocateSubpage() is defined in buffer/src/main/java/io/netty/buffer/PoolChunk.java at line 473.
What does allocateSubpage() call?
allocateSubpage() calls 5 function(s): allocate, allocateRun, calculateRunSize, runOffset, runSize.
What calls allocateSubpage()?
allocateSubpage() is called by 1 function(s): allocate.

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