First attempt at node.dlopen

Compiled first working 'hello world' module with this config

deps/libeio/wscript

@@ -113,4 +113,5 @@ def build(bld):
   libeio.install_path = None
   if bld.env["USE_DEBUG"]:
     libeio.clone("debug");
+  bld.install_files('${PREFIX}/include/node/', 'eio.h');
 

deps/libev/wscript

@@ -56,4 +56,5 @@ def build(bld):
   libev.install_path = None
   if bld.env["USE_DEBUG"]:
     libev.clone("debug");
+  bld.install_files('${PREFIX}/include/node/', 'ev.h');
 

src/main.cc

@@ -0,0 +1,7 @@
+#include "node.h"
+
+int
+main (int argc, char *argv[])
+{
+  return node::start(argc, argv);
+}

src/node.cc

@@ -16,6 +16,7 @@
 #include <stdlib.h>
 #include <strings.h>
 #include <assert.h>
+#include <dlfcn.h> /* dlopen(), dlsym() */
 
 #include <string>
 #include <list>
@@ -100,6 +101,36 @@ node_exit (const v8::Arguments& args)
   return Undefined();
 }
 
+typedef void (*extInit)(Handle<Object> exports);
+
+Handle<Value>
+node_dlopen (const v8::Arguments& args)
+{
+  if (args.Length() < 2) return Undefined();
+
+  HandleScope scope;
+
+  String::Utf8Value filename(args[0]->ToString());
+  Local<Object> target = args[1]->ToObject();
+
+  void *handle = dlopen(*filename, RTLD_LAZY);
+  if (handle == NULL) {
+    ThrowException(String::New("dlopen() failed."));
+    return Undefined();
+  }
+
+  void *init_handle = dlsym(handle, "init");
+  if (init_handle == NULL) {
+    ThrowException(String::New("No 'init' symbol found in module."));
+    return Undefined();
+  }
+  extInit init = reinterpret_cast<extInit>(init_handle);
+
+  init(target);
+
+  return Undefined();
+}
+
 v8::Handle<v8::Value>
 compile (const v8::Arguments& args)
 {
@@ -206,6 +237,7 @@ Load (int argc, char *argv[])
 
   NODE_SET_METHOD(node_obj, "compile", compile);
   NODE_SET_METHOD(node_obj, "reallyExit", node_exit);
+  NODE_SET_METHOD(node_obj, "dlopen", node_dlopen);
 
   node_obj->Set(String::NewSymbol("EventEmitter"),
               EventEmitter::constructor_template->GetFunction());
@@ -283,7 +315,7 @@ ParseArgs (int *argc, char **argv)
 }
 
 int
-main (int argc, char *argv[])
+node::start (int argc, char *argv[])
 {
   evcom_ignore_sigpipe();
   ev_default_loop(EVFLAG_AUTO); // initialize the default ev loop.

src/node.h

@@ -32,6 +32,7 @@ do {                                                                      \
 enum encoding {ASCII, UTF8, RAW};
 enum encoding ParseEncoding (v8::Handle<v8::Value> encoding_v);
 void FatalException (v8::TryCatch &try_catch);
+int start (int argc, char *argv[]);
 
 } // namespace node
 #endif // node_h

wscript

@@ -56,6 +56,7 @@ def configure(conf):
 
   conf.env["USE_DEBUG"] = Options.options.debug
 
+  conf.check(lib='dl', uselib_store='DL')
   if Options.options.debug:
     conf.check(lib='profiler', uselib_store='PROFILER')
 
@@ -127,6 +128,7 @@ def build_udns(bld):
     #debug.target = join(debug_dir, static_lib)
     bld.env_of_name('debug')["STATICLIB_UDNS"] = "udns"
     bld.env_of_name('debug')["LIBPATH_UDNS"] = debug_dir
+  bld.install_files('${PREFIX}/include/node/', 'deps/udns/udns.h');
 
 
 def build_v8(bld):
@@ -162,6 +164,8 @@ def build_v8(bld):
     v8_debug.rule = v8rule % (v8dir_tgt, scons, "debug")
     v8_debug.target = join("deps/v8", bld.env["staticlib_PATTERN"] % "v8_g")
 
+  bld.install_files('${PREFIX}/include/node/', 'deps/v8/include/v8*');
+
 def build(bld):
   bld.add_subdirs('deps/libeio deps/libev')
 
@@ -178,6 +182,7 @@ def build(bld):
   evcom.install_path = None
   if bld.env["USE_DEBUG"]:
     evcom.clone("debug")
+  bld.install_files('${PREFIX}/include/node/', 'deps/evcom/evcom.h');
 
   ### http_parser
   http_parser = bld.new_task_gen("cc", "staticlib")
@@ -222,10 +227,11 @@ def build(bld):
   if bld.env["USE_DEBUG"]:
     native_cc.clone("debug")
 
-  ### node
-  node = bld.new_task_gen("cxx", "program")
-  node.target = 'node'
-  node.source = """
+  ### node lib
+  libnode = bld.new_task_gen("cxx", "shlib")
+  libnode.name         = "node"
+  libnode.target       = "node"
+  libnode.source = """
     src/node.cc
     src/events.cc
     src/http.cc
@@ -237,7 +243,7 @@ def build(bld):
     src/child_process.cc
     src/constants.cc
   """
-  node.includes = """
+  libnode.includes = """
     src/ 
     deps/v8/include
     deps/libev
@@ -247,11 +253,24 @@ def build(bld):
     deps/http_parser
     deps/coupling
   """
-  node.uselib_local = "evcom ev eio http_parser coupling"
-  node.uselib = "UDNS V8 EXECINFO PROFILER EFENCE"
+  libnode.uselib_local = "evcom ev eio http_parser coupling"
+  libnode.uselib = "UDNS V8 EXECINFO PROFILER EFENCE DL"
+  libnode.install_path = '${PREFIX}/lib'
+  bld.install_files('${PREFIX}/include/node/', 'config.h src/node.h src/object_wrap.h');
+
+  ### node
+  node = bld.new_task_gen("cxx", "program")
+  node.target = 'node'
+  node.source = "src/main.cc"
+  node.includes = libnode.includes
+  node.uselib_local = "node"
   node.install_path = '${PREFIX}/bin'
   node.chmod = 0755
 
   if bld.env["USE_DEBUG"]:
-    node.clone("debug")
+    node_g = node.clone("debug")
+    node_g.target = "node_g"
+
+    libnode_g = libnode.clone("debug")
+    libnode_g.target = "node_g"