// 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>
#include <write/write.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 1
#define HAVE_MORECORE 0
#define ABORT writefmt("dlmalloc: Aborting...\n")
#define MALLOC_FAILURE_ACTION
#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_init(sl);
  return 0;
}
    
static MLOCK_T malloc_global_mutex = { 0 };

#define PAGE_SIZE 0x1000

static size_t _roundpage(size_t sz) {
  return (sz + PAGE_SIZE - 1) & ~(PAGE_SIZE - 1);
}

#define MAP_PRIVATE 0
#define PROT_READ 0
#define PROT_WRITE 0
#define O_RDWR 0

#define EMUL_DEV_ZERO_FD 123
#define EMUL_MAP_FAILED ((void *)-1)

int open(const char *path, int flags, ...) {
  return EMUL_DEV_ZERO_FD;
}

void *mmap(void *addr, size_t len, int prot, int flags, int fd, int off) {
  (void)off;
  uint8_t *outaddr = NULL;
  size_t need = _roundpage(len);

  int32_t err = mman_map(NULL, need, MMAN_MAP_PF_RW, 0, &outaddr);
  if (err != E_OK || outaddr == NULL) {
    return EMUL_MAP_FAILED;
  }

  if (fd == EMUL_DEV_ZERO_FD) {
    string_memset(outaddr, 0, need);
  }

  return outaddr;
}

int munmap(void *addr, size_t len) {
  (void)len;
  mman_unmap((uint8_t *)addr);
  return 0;
}