Moving the http.js, net.js FreeList to being standalone.

lib/freelist.js

@@ -0,0 +1,22 @@
+// This is a free list to avoid creating so many of the same object.
+exports.FreeList = function(name, max, constructor) {
+  this.name = name;
+  this.constructor = constructor;
+  this.max = max;
+  this.list = [];
+}
+
+
+exports.FreeList.prototype.alloc = function () {
+  //debug("alloc " + this.name + " " + this.list.length);
+  return this.list.length ? this.list.shift()
+                          : this.constructor.apply(this, arguments);
+};
+
+
+exports.FreeList.prototype.free = function (obj) {
+  //debug("free " + this.name + " " + this.list.length);
+  if (this.list.length < this.max) {
+    this.list.push(obj);
+  }
+};

lib/http.js

@@ -11,101 +11,91 @@ var sys = require('sys');
 var net = require('net');
 var events = require('events');
 
+var FreeList = require('freelist').FreeList;
 var HTTPParser = process.binding('http_parser').HTTPParser;
 
-var parserFreeList = [];
+var parsers = new FreeList('parsers', 1000, function () {
+  var parser = new HTTPParser('request');
 
-function newParser (type) {
-  var parser;
-  if (parserFreeList.length) {
-    parser = parserFreeList.shift();
-    parser.reinitialize(type);
-  } else {
-    parser = new HTTPParser(type);
+  parser.onMessageBegin = function () {
+    parser.incoming = new IncomingMessage(parser.socket);
+    parser.field = null;
+    parser.value = null;
+  };
 
-    parser.onMessageBegin = function () {
-      parser.incoming = new IncomingMessage(parser.socket);
+  // Only servers will get URL events.
+  parser.onURL = function (b, start, len) {
+    var slice = b.toString('ascii', start, start+len);
+    if (parser.incoming.url) {
+      parser.incoming.url += slice;
+    } else {
+      // Almost always will branch here.
+      parser.incoming.url = slice;
+    }
+  };
+
+  parser.onHeaderField = function (b, start, len) {
+    var slice = b.toString('ascii', start, start+len).toLowerCase();
+    if (parser.value) {
+      parser.incoming._addHeaderLine(parser.field, parser.value);
       parser.field = null;
       parser.value = null;
-    };
+    }
+    if (parser.field) {
+      parser.field += slice;
+    } else {
+      parser.field = slice;
+    }
+  };
 
-    // Only servers will get URL events.
-    parser.onURL = function (b, start, len) {
-      var slice = b.toString('ascii', start, start+len);
-      if (parser.incoming.url) {
-        parser.incoming.url += slice;
-      } else {
-        // Almost always will branch here.
-        parser.incoming.url = slice;
-      }
-    };
+  parser.onHeaderValue = function (b, start, len) {
+    var slice = b.toString('ascii', start, start+len);
+    if (parser.value) {
+      parser.value += slice;
+    } else {
+      parser.value = slice;
+    }
+  };
 
-    parser.onHeaderField = function (b, start, len) {
-      var slice = b.toString('ascii', start, start+len).toLowerCase();
-      if (parser.value) {
-        parser.incoming._addHeaderLine(parser.field, parser.value);
-        parser.field = null;
-        parser.value = null;
-      }
-      if (parser.field) {
-        parser.field += slice;
-      } else {
-        parser.field = slice;
-      }
-    };
+  parser.onHeadersComplete = function (info) {
+    if (parser.field && parser.value) {
+      parser.incoming._addHeaderLine(parser.field, parser.value);
+    }
 
-    parser.onHeaderValue = function (b, start, len) {
-      var slice = b.toString('ascii', start, start+len);
-      if (parser.value) {
-        parser.value += slice;
-      } else {
-        parser.value = slice;
-      }
-    };
+    parser.incoming.httpVersionMajor = info.versionMajor;
+    parser.incoming.httpVersionMinor = info.versionMinor;
+    parser.incoming.httpVersion = info.versionMajor
+                                + '.'
+                                + info.versionMinor ;
 
-    parser.onHeadersComplete = function (info) {
-      if (parser.field && parser.value) {
-        parser.incoming._addHeaderLine(parser.field, parser.value);
-      }
+    if (info.method) {
+      // server only
+      parser.incoming.method = info.method;
+    } else {
+      // client only
+      parser.incoming.statusCode = info.statusCode;
+    }
 
-      parser.incoming.httpVersionMajor = info.versionMajor;
-      parser.incoming.httpVersionMinor = info.versionMinor;
-      parser.incoming.httpVersion = info.versionMajor
-                                  + '.'
-                                  + info.versionMinor ;
+    parser.onIncoming(parser.incoming, info.shouldKeepAlive);
+  };
 
-      if (info.method) {
-        // server only
-        parser.incoming.method = info.method;
-      } else {
-        // client only
-        parser.incoming.statusCode = info.statusCode;
-      }
+  parser.onBody = function (b, start, len) {
+    // TODO body encoding?
+    var enc = parser.incoming._encoding;
+    if (!enc) {
+      parser.incoming.emit('data', b.slice(start, start+len));
+    } else {
+      var string = b.toString(enc, start, start+len);
+      parser.incoming.emit('data', string);
+    }
+  };
 
-      parser.onIncoming(parser.incoming, info.shouldKeepAlive);
-    };
+  parser.onMessageComplete = function () {
+    parser.incoming.emit("end");
+  };
 
-    parser.onBody = function (b, start, len) {
-      // TODO body encoding?
-      var enc = parser.incoming._encoding;
-      if (!enc) {
-        parser.incoming.emit('data', b.slice(start, start+len));
-      } else {
-        var string = b.toString(enc, start, start+len);
-        parser.incoming.emit('data', string);
-      }
-    };
-
-    parser.onMessageComplete = function () {
-      parser.incoming.emit("end");
-    };
-  }
   return parser;
-}
-
-function freeParser (parser) {
-  if (parserFreeList.length < 1000) parserFreeList.push(parser);
-}
+});
 
 
 var CRLF = "\r\n";
@@ -517,7 +507,9 @@ function connectionListener (socket) {
   // we need to keep track of the order they were sent.
   var responses = [];
 
-  var parser = newParser('request');
+  var parser = parsers.alloc();
+  parser.reinitialize('request');
+  parser.socket = socket;
 
   socket.ondata = function (d, start, end) {
     parser.execute(d, start, end - start);
@@ -526,7 +518,7 @@ function connectionListener (socket) {
   socket.onend = function () {
     parser.finish();
     // unref the parser for easy gc
-    freeParser(parser);
+    parsers.free(parser);
 
     if (responses.length == 0) {
       socket.end();
@@ -535,7 +527,6 @@ function connectionListener (socket) {
     }
   };
 
-  parser.socket = socket;
   // The following callback is issued after the headers have been read on a
   // new message. In this callback we setup the response object and pass it
   // to the user.
@@ -563,7 +554,8 @@ function Client ( ) {
   var requests = [];
   var currentRequest;
 
-  var parser = newParser('response');
+  var parser = parsers.alloc();
+  parser.reinitialize('response');
   parser.socket = this;
 
   self._reconnect = function () {
@@ -617,7 +609,7 @@ function Client ( ) {
     if (requests.length > 0) {
       self._reconnect();
     } else {
-      freeParser(parser);
+      parsers.free(parser);
     }
   });
 

lib/net.js

@@ -22,6 +22,7 @@ var binding = process.binding('net');
 // yet convinced that every use-case can be fit into that abstraction, so
 // waiting to implement it until I get more experience with this.
 var Buffer = require('buffer').Buffer;
+var FreeList = require('freelist').FreeList;
 
 var IOWatcher   = process.IOWatcher;
 var assert      = process.assert;
@@ -205,35 +206,6 @@ var timeout = new (function () {
   };
 })();
 
-
-
-
-
-// This is a free list to avoid creating so many of the same object.
-
-function FreeList (name, max, constructor) {
-  this.name = name;
-  this.constructor = constructor;
-  this.max = max;
-  this.list = [];
-}
-
-
-FreeList.prototype.alloc = function () {
-  //debug("alloc " + this.name + " " + this.list.length);
-  return this.list.length ? this.list.shift()
-                          : this.constructor.apply(this, arguments);
-};
-
-
-FreeList.prototype.free = function (obj) {
-  //debug("free " + this.name + " " + this.list.length);
-  if (this.list.length < this.max) {
-    this.list.push(obj);
-  }
-};
-
-
 var ioWatchers = new FreeList("iowatcher", 100, function () {
   return new IOWatcher();
 });

src/node.cc

@@ -1268,6 +1268,7 @@ static Handle<Value> Binding(const Arguments& args) {
       exports->Set(String::New("dns"),          String::New(native_dns));
       exports->Set(String::New("events"),       String::New(native_events));
       exports->Set(String::New("file"),         String::New(native_file));
+      exports->Set(String::New("freelist"),     String::New(native_freelist));
       exports->Set(String::New("fs"),           String::New(native_fs));
       exports->Set(String::New("http"),         String::New(native_http));
       exports->Set(String::New("http_old"),     String::New(native_http_old));