From 23389b1988b061e8487c316893a8a8eb77770a2f Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Thu, 19 Apr 2018 18:43:05 -0400 Subject: move malloc implementation types and macros to an internal header --- src/internal/malloc_impl.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 src/internal/malloc_impl.h (limited to 'src/internal/malloc_impl.h') diff --git a/src/internal/malloc_impl.h b/src/internal/malloc_impl.h new file mode 100644 index 00000000..1ea0407c --- /dev/null +++ b/src/internal/malloc_impl.h @@ -0,0 +1,39 @@ +#ifndef MALLOC_IMPL_H +#define MALLOC_IMPL_H + +void *__mmap(void *, size_t, int, int, int, off_t); +int __munmap(void *, size_t); +void *__mremap(void *, size_t, size_t, int, ...); +int __madvise(void *, size_t, int); + +struct chunk { + size_t psize, csize; + struct chunk *next, *prev; +}; + +struct bin { + volatile int lock[2]; + struct chunk *head; + struct chunk *tail; +}; + +#define SIZE_ALIGN (4*sizeof(size_t)) +#define SIZE_MASK (-SIZE_ALIGN) +#define OVERHEAD (2*sizeof(size_t)) +#define MMAP_THRESHOLD (0x1c00*SIZE_ALIGN) +#define DONTCARE 16 +#define RECLAIM 163840 + +#define CHUNK_SIZE(c) ((c)->csize & -2) +#define CHUNK_PSIZE(c) ((c)->psize & -2) +#define PREV_CHUNK(c) ((struct chunk *)((char *)(c) - CHUNK_PSIZE(c))) +#define NEXT_CHUNK(c) ((struct chunk *)((char *)(c) + CHUNK_SIZE(c))) +#define MEM_TO_CHUNK(p) (struct chunk *)((char *)(p) - OVERHEAD) +#define CHUNK_TO_MEM(c) (void *)((char *)(c) + OVERHEAD) +#define BIN_TO_CHUNK(i) (MEM_TO_CHUNK(&mal.bins[i].head)) + +#define C_INUSE ((size_t)1) + +#define IS_MMAPPED(c) !((c)->csize & (C_INUSE)) + +#endif -- cgit v1.2.1