#ifndef FZL_VM_EXTERN_H
#define FZL_VM_EXTERN_H

#include <ffi.h>
#include <stddef.h>
#include <vm/fzl_vm_reader.h>

// Loaded extern function definition
typedef struct
{
  void *func_ptr;
  ffi_cif cif;
  ffi_type **arg_types;
} fzl_vm_sym_t;

// Extern object descriptor
typedef struct
{
  void **libs;
  size_t libs_loaded;

  fzl_vm_sym_t *syms;
  size_t syms_loaded;
} fzl_vm_extern_t;

// Load externs
fzl_vm_extern_t *fzl_vm_init_externs(fzl_vm_reader_t *reader);

// Get last error from externs loader
char *fzl_vm_externs_geterror();

// Close and free externs
void fzl_vm_free_externs(fzl_vm_extern_t *ex);

#endif // FZL_VM_EXTERN_H