#include "malloc.h"

#define LACKS_UNISTD_H 1
#define LACKS_FCNTL_H 1
#define LACKS_SYS_PARAM_H 1
#define LACKS_SYS_MMAN_H 1
#define LACKS_STRINGS_H 1
#define LACKS_STRING_H 1
#define LACKS_SYS_TYPES_H 1
#define LACKS_ERRNO_H 1
#define LACKS_STDLIB_H 1
#define LACKS_SCHED_H 1
#define LACKS_TIME_H 1
#define NO_MALLOC_STATS 1
#define NO_MALLINFO 1
#define USE_LOCKS 0
#define HAVE_MMAP 0
#define HAVE_MORECORE 1
#define USAGE_ERROR_ACTION(m,p)
#define MALLOC_FAILURE_ACTION
#define ABORT
#define ENOMEM 12
#define EINVAL 22
#define DLMALLOC_EXPORT
#define ONLY_MSPACES 1

#define MALLOC_ALIGNMENT 8
#define MORECORE_CONTIGUOUS 1
#define MORECORE_CANNOT_TRIM 1
#define MORECORE mspace_more
#define malloc_getpagesize 65536
#define DEFAULT_GRANULARITY 65536

static inline void *mspace_more(ptrdiff_t);

#include "memcmp.c"
#include "memcpy.c"
#include "memset.c"
#include "dlmalloc.c"

// initializes the single mspace used by the internal malloc implementation, starting at 'base'
void *mspace_init(void *base) {
  return create_mspace_with_base(base, (void *)((uintptr_t)__builtin_wasm_current_memory() << 16) - base, 0);
}

// called by dlmalloc when requesting more memory
void *mspace_more(ptrdiff_t size) {
  uintptr_t heapMax = (uintptr_t)__builtin_wasm_current_memory() << 16;

  if (size > 0) {

    if (__builtin_wasm_grow_memory(((size - 1) >> 16) + 1) == 0)
      return (void *) MFAIL;

  } else if (size < 0)
    return (void *) MFAIL;

  return (void *) heapMax;
}