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cffi

0.3.0
0.3.1 0.3.0

Erlang CFFI — call C shared libraries from Erlang via libffi

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cffi src cffi_nif.erl
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src/cffi_nif.erl 

%% cffi_nif.erl — NIF stub module.

%%

%% Do not call these functions directly; use cffi.erl instead.

%% All real work is in c_src/cffi_nif.c loaded via on_load.



-module(cffi_nif).

-on_load(init/0).



-export([

    lib_open/1,

    call/4,

    call_va/5,

    mem_alloc/1,

    mem_free/1,

    mem_read/2,

    mem_write/3,

    mem_read_bytes/2,

    mem_write_bytes/2,

    ptr_add/2,

    ptr_null/0,

    ptr_is_null/1,

    type_size/1,

    callback_new/3,

    callback_return/2

]).



init() ->

    PrivDir = code:priv_dir(cffi),

    erlang:load_nif(filename:join(PrivDir, "cffi_nif"), 0).



lib_open(_Path)                       -> erlang:nif_error(not_loaded).

call(_Lib, _Fn, _Ret, _Args)          -> erlang:nif_error(not_loaded).

call_va(_Lib, _Fn, _Ret, _NF, _Args) -> erlang:nif_error(not_loaded).

mem_alloc(_Size)             -> erlang:nif_error(not_loaded).

mem_free(_Ptr)               -> erlang:nif_error(not_loaded).

mem_read(_Ptr, _Type)        -> erlang:nif_error(not_loaded).

mem_write(_Ptr, _Type, _Val) -> erlang:nif_error(not_loaded).

mem_read_bytes(_Ptr, _Size)  -> erlang:nif_error(not_loaded).

mem_write_bytes(_Ptr, _Bin)  -> erlang:nif_error(not_loaded).

ptr_add(_Ptr, _Off)          -> erlang:nif_error(not_loaded).

ptr_null()                   -> erlang:nif_error(not_loaded).

ptr_is_null(_Ptr)            -> erlang:nif_error(not_loaded).

type_size(_Type)             -> erlang:nif_error(not_loaded).

callback_new(_Ret,_Args,_Pid)-> erlang:nif_error(not_loaded).

callback_return(_CbId,_Ret)  -> erlang:nif_error(not_loaded).