├── .gitignore
├── README
├── nas.cc
├── package.json
├── test.js
└── wscript


/.gitignore:
--------------------------------------------------------------------------------
1 | .lock-wscript
2 | build/
3 | 


--------------------------------------------------------------------------------
/README:
--------------------------------------------------------------------------------
 1 | This is about the simplest reduction you can get for using eio_custom.
 2 | 
 3 | To run:
 4 | 
 5 |     node-waf configure build && node test.js
 6 | 
 7 | Or, you can link or install it with npm.  Note that it has hardly anything
 8 | in the package.json, either.
 9 | 
10 |     npm link && npm test async-simple
11 | 


--------------------------------------------------------------------------------
/nas.cc:
--------------------------------------------------------------------------------
 1 | 
 2 | #include <v8.h>
 3 | #include <node.h>
 4 | #include <string.h>
 5 | #include <stdlib.h>
 6 | #include <unistd.h>
 7 | 
 8 | using namespace std;
 9 | using namespace node;
10 | using namespace v8;
11 | 
12 | static Handle<Value> DoSomethingAsync (const Arguments&);
13 | static int DoSomething (eio_req *);
14 | static int DoSomething_After (eio_req *);
15 | extern "C" void init (Handle<Object>);
16 | 
17 | struct simple_request {
18 |   int x;
19 |   int y;
20 |   Persistent<Function> cb;
21 |   // maybe it matters to put the char[] last?  not sure.
22 |   char name[1];
23 | };
24 | 
25 | static Handle<Value> DoSomethingAsync (const Arguments& args) {
26 |   HandleScope scope;
27 |   const char *usage = "usage: doSomething(x, y, name, cb)";
28 |   if (args.Length() != 4) {
29 |     return ThrowException(Exception::Error(String::New(usage)));
30 |   }
31 |   int x = args[0]->Int32Value();
32 |   int y = args[1]->Int32Value();
33 |   String::Utf8Value name(args[2]);
34 |   Local<Function> cb = Local<Function>::Cast(args[3]);
35 | 
36 |   simple_request *sr = (simple_request *)
37 |     malloc(sizeof(struct simple_request) + name.length() + 1);
38 | 
39 |   sr->cb = Persistent<Function>::New(cb);
40 |   strncpy(sr->name, *name, name.length() + 1);
41 |   sr->x = x;
42 |   sr->y = y;
43 | 
44 |   eio_custom(DoSomething, EIO_PRI_DEFAULT, DoSomething_After, sr);
45 |   ev_ref(EV_DEFAULT_UC);
46 |   return Undefined();
47 | }
48 | 
49 | // this function happens on the thread pool
50 | // doing v8 things in here will make bad happen.
51 | static int DoSomething (eio_req *req) {
52 |   struct simple_request * sr = (struct simple_request *)req->data;
53 |   sleep(2); // just to make it less pointless to be async.
54 |   req->result = sr->x + sr->y;
55 |   return 0;
56 | }
57 | 
58 | static int DoSomething_After (eio_req *req) {
59 |   HandleScope scope;
60 |   ev_unref(EV_DEFAULT_UC);
61 |   struct simple_request * sr = (struct simple_request *)req->data;
62 |   Local<Value> argv[3];
63 |   argv[0] = Local<Value>::New(Null());
64 |   argv[1] = Integer::New(req->result);
65 |   argv[2] = String::New(sr->name);
66 |   TryCatch try_catch;
67 |   sr->cb->Call(Context::GetCurrent()->Global(), 3, argv);
68 |   if (try_catch.HasCaught()) {
69 |     FatalException(try_catch);
70 |   }
71 |   sr->cb.Dispose();
72 |   free(sr);
73 |   return 0;
74 | }
75 | 
76 | extern "C" void init (Handle<Object> target) {
77 |   HandleScope scope;
78 |   NODE_SET_METHOD(target, "doSomething", DoSomethingAsync);
79 | }
80 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
1 | { "name" : "async-simple"
2 | , "description" : "An eio_custom example program"
3 | , "version" : "1.0.0"
4 | , "author" : "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me/)"
5 | , "main" : "build/default/nas.node"
6 | , "scripts" : { "test" : "node test.js" }
7 | }
8 | 


--------------------------------------------------------------------------------
/test.js:
--------------------------------------------------------------------------------
 1 | var nas = require("./build/default/nas")
 2 |   , start = Date.now()
 3 | 
 4 | console.log("js "+(Date.now() - start), "before hello")
 5 | nas.doSomething(1, 2, "hello", function (er, res, n) {
 6 |   console.log("js "+(Date.now() - start), er, res, n)
 7 | })
 8 | console.log("js "+(Date.now() - start), "before goodbye")
 9 | nas.doSomething(3, 4, "goodbye", function (er, res, n) {
10 |   console.log("js "+(Date.now() - start), er, res, n)
11 | })
12 | 


--------------------------------------------------------------------------------
/wscript:
--------------------------------------------------------------------------------
 1 | srcdir = "."
 2 | blddir = "build"
 3 | VERSION = "0.0.1"
 4 | 
 5 | def set_options(opt):
 6 |   opt.tool_options("compiler_cxx")
 7 | 
 8 | def configure(conf):
 9 |   conf.check_tool("compiler_cxx")
10 |   conf.check_tool("node_addon")
11 | 
12 | def build(bld):
13 |   obj = bld.new_task_gen("cxx", "shlib", "node_addon")
14 |   # without this, eio_custom doesn't keep a ref to the req->data
15 |   obj.cxxflags = ["-D_FILE_OFFSET_BITS=64", "-D_LARGEFILE_SOURCE"]
16 |   obj.target = "nas"
17 |   obj.source = "nas.cc"


--------------------------------------------------------------------------------