40 lines
964 B
C
40 lines
964 B
C
#ifndef MALLOC_IMPL_H
|
|
#define MALLOC_IMPL_H
|
|
|
|
#include <sys/mman.h>
|
|
#include "dynlink.h"
|
|
|
|
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))
|
|
|
|
hidden void __bin_chunk(struct chunk *);
|
|
|
|
#endif
|