2012-03-28 31 views
11

我正在編寫一個由C++與C程序混合的自定義node.js插件。自定義node.js插件可以構建但不能包括

的addon.cc包括像

#define BUILDING_NODE_EXTENSION 
#include <node.h> 
#include <node_buffer.h> 

using namespace v8; 
using namespace node; 


/* other logic and function... */ 


Handle<Value> RunCallback(const Arguments& args) { 
    HandleScope scope; 

    Local<Value> buffer1 = args[0]; 
    size_t size = Buffer::Length(buffer1->ToObject()); 
    char* bufferdata = Buffer::Data(buffer1->ToObject()); 

    /* some logic written in C style ... */ 

    Local<Function> cb = Local<Function>::Cast(args[1]); 
    const unsigned argc = 1; 
    Local<Value> argv[argc] = { Local<Value>::New(String::New(outputdata, outputSize)) }; 

    cb->Call(Context::GetCurrent()->Global(), argc, argv); 

    return scope.Close(Undefined()); 
} 

void Init(Handle<Object> target) { 
    target->Set(String::NewSymbol("runCallback"), FunctionTemplate::New(RunCallback)->GetFunction()); 
} 

NODE_MODULE(addon, Init) 

它還包括其它.cc的文件,因此WScript的是這樣的:

srcdir = '.' 
blddir = 'build' 
VERSION = '0.0.1' 

def set_options(opt): 
    opt.tool_options('compiler_cxx') 

def configure(conf): 
    conf.check_tool('compiler_cxx') 
    conf.check_tool('node_addon') 

def build(bld): 
    obj = bld.new_task_gen('cxx', 'shlib', 'node_addon') 
    obj.target = 'addon' 
    obj.source = ['addon.cc', 'otherFiles.cc'] 

當我運行節點-WAF配置,它顯示:

Checking for program g++ or c++   : /usr/bin/g++ 
Checking for program cpp     : /usr/bin/cpp 
Checking for program ar     : /usr/bin/ar 
Checking for program ranlib    : /usr/bin/ranlib 
Checking for g++       : ok 
Checking for node path     : not found 
Checking for node prefix     : ok /usr/local 
'configure' finished successfully (0.169s) 

當我運行node-waf構建時,它顯示:

Waf: Entering directory `/path/build' 
[ 1/25] cxx: addon.cc -> build/Release/addon_1.o 
... list of file ... 
build/Release/list of file -> build/Release/addon.node 
Waf: Leaving directory `/path/build' 
'build' finished successfully (0.544s) 

但是當我嘗試在節點REPL以下,這表明:

var addon = require("./build/Release/addon"); 
Error: Unable to load shared library /path/build/Release/addon.node 
    at Object..node (module.js:472:11) 
    at Module.load (module.js:348:31) 
    at Function._load (module.js:308:12) 
    at Module.require (module.js:354:17) 
    at require (module.js:370:17) 
    at repl:1:13 
    at REPLServer.eval (repl.js:80:21) 
    at repl.js:190:20 
    at REPLServer.eval (repl.js:87:5) 
    at Interface.<anonymous> (repl.js:182:12) 

這是非常奇怪的。我已經檢查過該文件應與系統架構:

$ file build/Release/addon.node 
build/Release/addon.node: Mach-O 64-bit bundle x86_64 

$ file `which node` 
/usr/local/bin/node: Mach-O 64-bit executable x86_64 

通過觀察納米,它顯示以下內容:

nm ./build/Release/addon.node 
0000000000011880 s GCC_except_table30 
0000000000001160 t _Init 
       U __Unwind_Resume_or_Rethrow 
       U ___bzero 
       U ___gxx_personality_v0 
0000000000013220 D _addon_module 
       U _free 
0000000000013600 D _lsfmeanTbl 
0000000000013420 D _memLfTbl 
       U _memcpy 
       U _memmove 
       U _puts 
       U _realloc 
0000000000011950 s _ssqEn_win.2272 
000000000001341c D _stMemLTbl 
00000000000132e0 D _state_frgqTbl 
00000000000132c0 D _state_sq3Tbl 
       U dyld_stub_binder 
       (... many are omitted ...) 

會有什麼可能的原因是什麼?難道我不能將C文件與C++文件結合起來編譯?我應該刪除所有的malloc/realloc/free嗎?或者其他可能的原因?

+0

我試圖在Mac和Linux上構建,結果相同,包括庫時顯示錯誤。 – 2012-03-28 10:49:50

+0

我很確定這個問題是由於外部的C文件造成的。但爲什麼?我懷疑。 – 2012-03-28 12:20:51

+2

也許我應該問,有沒有用於編寫node.js插件的純C解決方案? – 2012-03-29 05:40:38

回答

0

通過使用的node.js哪個版本> = 0.7.6。問題已經解決了。另外,它還有更多的調試信息。

0

裹初始化的()的定義和在extern "C" NODE_MODULE宏用來填充,以避免名稱C++導出的符號的重整:

extern "C" { 

void Init(Handle<Object> target) { 
    target->Set(String::NewSymbol("runCallback"), FunctionTemplate::New(RunCallback)->GetFunction()); 
} 

NODE_MODULE(addon, Init) 
} 
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