// Config

#include <stddef.h>
#include <dlmalloc/malloc.h>
#include <uprintf.h>
#include <errors.h>
#include <sync/spinlock.h>
#include <string/string.h>
#include <sysdefs/mman.h>
#include <system/system.h>

#define USE_DL_PREFIX 1
#define LACKS_SYS_TYPES_H 1
#define NO_MALLOC_STATS 1
#define LACKS_ERRNO_H 1
#define LACKS_TIME_H 1
#define LACKS_STDLIB_H 1
#define LACKS_SYS_MMAN_H 1
#define LACKS_FCNTL_H 1
#define LACKS_UNISTD_H 1
#define LACKS_SYS_PARAM_H 1
#define LACKS_STRINGS_H 1
#define LACKS_SCHED_H 1
#define HAVE_MMAP 0
#define ABORT \
  do { \
    uprintf("dlmalloc: Aborting...\n"); \
  } while(0)
#define MALLOC_FAILURE_ACTION
#define HAVE_MORECORE 1
#define USE_LOCKS 2
#define malloc_getpagesize 0x1000
#define EINVAL E_INVALIDARGUMENT
#define ENOMEM E_NOMEMORY

#define MLOCK_T SpinLock

int ACQUIRE_LOCK(SpinLock *sl) {
  spinlock_acquire(sl);
  return 0;
}

int RELEASE_LOCK(SpinLock *sl) {
  spinlock_release(sl);
  return 0;
}

int INITIAL_LOCK(SpinLock *sl) {
  spinlock_release(sl);
  return 0;
}
    
static MLOCK_T malloc_global_mutex = { 0 };

#define PAGE_SIZE 0x1000
static uint8_t *heap_end = NULL;

void *sbrk(long inc) {
  if (inc == 0) {
    return heap_end;
  }

  uint8_t *new_heap_end = heap_end + inc;
  if (new_heap_end > heap_end) {
    size_t size = new_heap_end - heap_end;

    uint8_t *out = NULL;
    int32_t ret = mman_map(heap_end, size, MMAN_MAP_PF_RW, 0, &out);
    if (ret != E_OK) {
      return (void *)-1;
    }
    string_memset(out, 0, size);
  }
  heap_end = new_heap_end;
  return (void *)heap_end;
}