#ifndef DEVER_FFI_H
#define DEVER_FFI_H

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#define DEVER_FFI_ABI_V1 1
#define DEVER_FFI_OK 0
#define DEVER_FFI_ERROR 1
#define DEVER_FFI_FAULT 2

typedef struct {
    const char *data;
    uint64_t size;
} dever_ffi_slice;

typedef struct {
    char *data;
    uint64_t capacity;
    uint64_t size;
} dever_ffi_output;

typedef struct {
    uint32_t abi;
    void *context;
    int (*open)(void *context, dever_ffi_slice setting);
    int (*invoke)(void *context, dever_ffi_slice operation, dever_ffi_slice payload, dever_ffi_output *output);
    void (*close)(void *context);
} dever_ffi_handler;

int dever_ffi_serve(const dever_ffi_handler *handler);

#ifdef __cplusplus
}
#endif

#endif