mjs-sys 0.1.2

Rust mJS Bindings
Documentation 
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/*
 * Copyright (c) 2016 Cesanta Software Limited
 * All rights reserved
 */

#ifndef MJS_FFI_FFI_H_
#define MJS_FFI_FFI_H_

#include "common/platform.h"

#if defined(__cplusplus)
extern "C" {
#endif /* __cplusplus */

/*
 * Maximum number of word-sized args to ffi-ed function. If at least one
 * of the args is double, only 2 args are allowed.
 */
#define FFI_MAX_ARGS_CNT 6

typedef void(ffi_fn_t)(void);

typedef intptr_t ffi_word_t;

enum ffi_ctype {
  FFI_CTYPE_WORD,
  FFI_CTYPE_BOOL,
  FFI_CTYPE_FLOAT,
  FFI_CTYPE_DOUBLE,
};

struct ffi_arg {
  enum ffi_ctype ctype;
  union {
    uint64_t i;
    double d;
    float f;
  } v;
};

int ffi_call(ffi_fn_t *func, int nargs, struct ffi_arg *res,
             struct ffi_arg *args);

void ffi_set_word(struct ffi_arg *arg, ffi_word_t v);
void ffi_set_bool(struct ffi_arg *arg, bool v);
void ffi_set_ptr(struct ffi_arg *arg, void *v);
void ffi_set_double(struct ffi_arg *arg, double v);
void ffi_set_float(struct ffi_arg *arg, float v);

#if defined(__cplusplus)
}
#endif /* __cplusplus */

#endif /* MJS_FFI_FFI_H_ */