src/mem/PoolChunked.h

   1 /*
   2  * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 #ifndef SQUID_SRC_MEM_POOLCHUNKED_H
  10 #define SQUID_SRC_MEM_POOLCHUNKED_H
  11
  12 #include "mem/Allocator.h"
  13 #include "splay.h"
  14
  15 #define MEM_CHUNK_SIZE        4 * 4096  /* 16KB ... 4 * VM_PAGE_SZ */
  16 #define MEM_CHUNK_MAX_SIZE  256 * 1024  /* 2MB */
  17
  18 class MemChunk;
  19
  20 /// \ingroup MemPoolsAPI
  21 class MemPoolChunked : public Mem::Allocator
  22 {
  23 public:
  24     friend class MemChunk;
  25     MemPoolChunked(const char *label, size_t obj_size);
  26     ~MemPoolChunked() override;
  27     void convertFreeCacheToChunkFreeCache();
  28     void createChunk();
  29     void *get();
  30     void push(void *obj);
  31
  32     /* Mem::Allocator API */
  33     size_t getStats(Mem::PoolStats &) override;
  34     void setChunkSize(size_t) override;
  35     bool idleTrigger(int) const override;
  36     void clean(time_t) override;
  37
  38 protected:
  39     /* Mem::Allocator API */
  40     void *allocate() override;
  41     void deallocate(void *) override;
  42
  43 public:
  44     size_t chunk_size;
  45     int chunk_capacity;
  46     int chunkCount;
  47     void *freeCache;
  48     MemChunk *nextFreeChunk;
  49     MemChunk *Chunks;
  50     Splay<MemChunk *> allChunks;
  51 };
  52
  53 /// \ingroup MemPoolsAPI
  54 class MemChunk
  55 {
  56 public:
  57     MemChunk(MemPoolChunked *pool);
  58     ~MemChunk();
  59     void *freeList;
  60     void *objCache;
  61     int inuse_count;
  62     MemChunk *nextFreeChunk;
  63     MemChunk *next;
  64     time_t lastref;
  65     MemPoolChunked *pool;
  66 };
  67
  68 #endif /* SQUID_SRC_MEM_POOLCHUNKED_H */
  69