deps/jemalloc/include/jemalloc/internal/chunk.h

   1 /******************************************************************************/
   2 #ifdef JEMALLOC_H_TYPES
   3
   4 /*
   5  * Size and alignment of memory chunks that are allocated by the OS's virtual
   6  * memory system.
   7  */
   8 #define LG_CHUNK_DEFAULT        22
   9
  10 /* Return the chunk address for allocation address a. */
  11 #define CHUNK_ADDR2BASE(a)                                              \
  12         ((void *)((uintptr_t)(a) & ~chunksize_mask))
  13
  14 /* Return the chunk offset of address a. */
  15 #define CHUNK_ADDR2OFFSET(a)                                            \
  16         ((size_t)((uintptr_t)(a) & chunksize_mask))
  17
  18 /* Return the smallest chunk multiple that is >= s. */
  19 #define CHUNK_CEILING(s)                                                \
  20         (((s) + chunksize_mask) & ~chunksize_mask)
  21
  22 #endif /* JEMALLOC_H_TYPES */
  23 /******************************************************************************/
  24 #ifdef JEMALLOC_H_STRUCTS
  25
  26 #endif /* JEMALLOC_H_STRUCTS */
  27 /******************************************************************************/
  28 #ifdef JEMALLOC_H_EXTERNS
  29
  30 extern size_t           opt_lg_chunk;
  31 #ifdef JEMALLOC_SWAP
  32 extern bool             opt_overcommit;
  33 #endif
  34
  35 #if (defined(JEMALLOC_STATS) || defined(JEMALLOC_PROF))
  36 /* Protects stats_chunks; currently not used for any other purpose. */
  37 extern malloc_mutex_t   chunks_mtx;
  38 /* Chunk statistics. */
  39 extern chunk_stats_t    stats_chunks;
  40 #endif
  41
  42 #ifdef JEMALLOC_IVSALLOC
  43 extern rtree_t          *chunks_rtree;
  44 #endif
  45
  46 extern size_t           chunksize;
  47 extern size_t           chunksize_mask; /* (chunksize - 1). */
  48 extern size_t           chunk_npages;
  49 extern size_t           map_bias; /* Number of arena chunk header pages. */
  50 extern size_t           arena_maxclass; /* Max size class for arenas. */
  51
  52 void    *chunk_alloc(size_t size, bool base, bool *zero);
  53 void    chunk_dealloc(void *chunk, size_t size, bool unmap);
  54 bool    chunk_boot(void);
  55
  56 #endif /* JEMALLOC_H_EXTERNS */
  57 /******************************************************************************/
  58 #ifdef JEMALLOC_H_INLINES
  59
  60 #endif /* JEMALLOC_H_INLINES */
  61 /******************************************************************************/
  62
  63 #include "jemalloc/internal/chunk_swap.h"
  64 #include "jemalloc/internal/chunk_dss.h"
  65 #include "jemalloc/internal/chunk_mmap.h"