Ruby binding functional

7 files changed, 382 insertions, 640 deletions

diff --git a/perf/ruby/local_lat.rb b/perf/ruby/local_lat.rb
index 3079b2e..b71af80 100644
--- a/perf/ruby/local_lat.rb
+++ b/perf/ruby/local_lat.rb
@@ -18,58 +18,24 @@
 
 require 'librbzmq'
 
-class AssertionFailure < StandardError
+if ARGV.length != 3
+	puts "usage: local_lat <bind-to> <message-size> <roundtrip-count>"
+	Process.exit
 end
-
-def assert(bool, message = 'assertion failure')
-    raise AssertionFailure.new(message) unless bool
-end
-
-	if ARGV.length != 4
-		puts "usage: local_lat <in-interface> <out-interface> <message-size>
-		<roundtrip-count>"
-		Process.exit
-    end
-        
-	in_interface = ARGV[0]
-	out_interface = ARGV[1]
-	message_size = ARGV[2]
-	roundtrip_count = ARGV[3]
-				
-	#  Print out the test parameters.
-    puts "message size: #{message_size} [B]"
-    puts "roundtrip count: #{roundtrip_count}"
-
-	#  Create 0MQ transport.
-    rb_zmq = Zmq.new()
     
-    #  Create the wiring.
-    context = rb_zmq.context(1,1)
-    in_socket = rb_zmq.socket(context, ZMQ_SUB)
-    out_socket = rb_zmq.socket(context, ZMQ_PUB)
-    
-    #  Bind.
-    rb_zmq.bind(in_socket, in_interface.to_s)
-    rb_zmq.bind(out_socket, out_interface.to_s)
-
-    #  Create message data to send.
-	out_msg = rb_zmq.msg_init_size(message_size.to_i)
-		
-   	#  Get initial timestamp.
-    start_time = Time.now
+bind_to = ARGV[0]
+message_size = ARGV[1].to_i
+roundtrip_count = ARGV[2].to_i
+			
+ctx = Context.new(1, 1)
+s = Socket.new(ctx, REP);
+s.bind(bind_to);
+
+for i in 0...roundtrip_count do
+    msg = s.recv(0)
+    s.send(msg, 0)
+end
 
-	#  The message loop.
-    for i in 0...roundtrip_count.to_i do
-		rb_zmq.send(out_socket, out_msg, ZMQ_NOBLOCK)
-		in_buf = rb_zmq.recv(in_socket, ZMQ_NOBLOCK)
-        assert(rb_zmq.msg_size(in_buf.msg) == message_size.to_i)
-   	end
+sleep 1
 
-    #  Get final timestamp.
-  	end_time = Time.now
 
-    #  Compute and print out the latency.
-    latency = (end_time.to_f - start_time.to_f) *1000000 / 
-    	roundtrip_count.to_i / 2
-    puts "Your average latency is " +  "%0.2f" % latency  + "[us]"
-    
diff --git a/perf/ruby/local_thr.rb b/perf/ruby/local_thr.rb
index 6e2c62a..4d9357b 100644
--- a/perf/ruby/local_thr.rb
+++ b/perf/ruby/local_thr.rb
@@ -17,74 +17,40 @@
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 require 'librbzmq'
-class Context
-end
 
-class Socket
+if ARGV.length != 3
+	puts "usage: local_thr <bind-to> <message-size> <message-count>"
+    Process.exit
 end
 
-class AssertionFailure < StandardError
-end
+bind_to = ARGV[0]
+message_size = ARGV[1].to_i
+message_count = ARGV[2].to_i
+					
+ctx = Context.new(1, 1)
+s = Socket.new(ctx, SUB);
+s.bind(bind_to);
 
-def assert(bool, message = 'assertion failure')
-    raise AssertionFailure.new(message) unless bool
+msg = s.recv(0)
+    
+start_time = Time.now
+   
+for i in 1...message_count.to_i do
+    msg = s.recv(0)
 end
 
-	if ARGV.length != 3
-		puts "usage: local_thr <in-interface> <message-size>" + \
-		" <message-count>"
-        Process.exit
-    end
+end_time = Time.now
 
-	in_interface = ARGV[0]
-   	message_size = ARGV[1]
-	message_count = ARGV[2]
-	
-	#  Print out the test parameters.
-    puts "message size: " + message_size.to_s + " [B]"
-	puts "message count: " + message_count.to_s
-						
-	#  Create 0MQ transport.
-    rb_zmq = Zmq.new();
-    
-    #  Create context.
-	context = rb_zmq.context(1, 1);    
-    	    
-    #  Create the socket.
-	in_socket = rb_zmq.socket(context, ZMQ_SUB);
-		
-   	#  Connect.
-   	rb_zmq.connect(in_socket, in_interface.to_s);
-   	
-   	#  Receive first message
-    data = rb_zmq.recv(in_socket, ZMQ_NOBLOCK);
-    assert(rb_zmq.msg_size(data.msg) == message_size.to_i)
-	    
-    #  Get initial timestamp.
-    start_time = Time.now
-       
-    #  The message loop.
-    for i in 0...message_count.to_i-1 do
-    	data = rb_zmq.recv(in_socket, ZMQ_NOBLOCK);
-    	assert(rb_zmq.msg_size(data.msg) == message_size.to_i)
-    end
- 
-    #  Get terminal timestamp.
-    end_time = Time.now
-    
-    #  Compute and print out the throughput.
-    if end_time.to_f - start_time.to_f != 0
-    	message_throughput = message_count.to_i / 
-    		(end_time.to_f - start_time.to_f);
-    else
-    	message_throughput = message_count.to_i
-    end
-    
-    megabit_throughput = message_throughput.to_f * message_size.to_i * 8 /
-       1000000;
-    puts "Your average throughput is " + "%0.2f" % message_throughput.to_s + 
-    	" [msg/s]"
-    puts "Your average throughput is " + "%0.2f" % megabit_throughput.to_s + 
-    	" [Mb/s]"    
+elapsed = (end_time.to_f - start_time.to_f) * 1000000
+if elapsed == 0
+    elapsed = 1
+end
+
+throughput = message_count * 1000000 / elapsed
+megabits = throughput * message_size * 8 / 1000000
 
+puts "message size: %i [B]" % message_size
+puts "message count: %i" % message_count
+puts "mean throughput: %i [msg/s]" % throughput
+puts "mean throughput: %.3f [Mb/s]" % megabits
 
diff --git a/perf/ruby/remote_lat.rb b/perf/ruby/remote_lat.rb
index 953e579..9387fe1 100644
--- a/perf/ruby/remote_lat.rb
+++ b/perf/ruby/remote_lat.rb
@@ -18,44 +18,36 @@
 
 require 'librbzmq'
 
-class AssertionFailure < StandardError
+if ARGV.length != 3
+	puts "usage: remote_lat <connect-to> <message-size> <roundtrip-count>"
+    Process.exit
 end
 
-def assert(bool, message = 'assertion failure')
-    raise AssertionFailure.new(message) unless bool
+connect_to = ARGV[0]
+message_size = ARGV[1].to_i
+roundtrip_count = ARGV[2].to_i
+					
+ctx = Context.new(1, 1)
+s = Socket.new(ctx, REQ);
+s.connect(connect_to);
+
+msg = "#{'0'*message_size}"
+
+start_time = Time.now
+
+for i in 0...roundtrip_count do
+    s.send(msg, 0)
+    msg = s.recv(0)
 end
 
-	if ARGV.length != 4
-		puts "usage: remote_lat <in-interface> <out-interface>" + \
-		" <message-size> <roundtrip-count>"
-        Process.exit
-    end
-
-	in_interface = ARGV[0]
-  	out_interface = ARGV[1]
-	message_size = ARGV[2]
-	roundtrip_count = ARGV[3]
-						
-	#  Create 0MQ transport.
-    rb_zmq = Zmq.new()
-    
-    #  Create the wiring.
-    context = rb_zmq.context(1,1)
-    in_socket = rb_zmq.socket(context, ZMQ_SUB)
-    out_socket = rb_zmq.socket(context, ZMQ_PUB)
-    
-    #  Connect.
-    rb_zmq.connect(in_socket, in_interface.to_s)
-    rb_zmq.connect(out_socket, out_interface.to_s)
-	    
-    #  The message loop.
-    for i in 0...roundtrip_count.to_i do
-    	data = rb_zmq.recv(in_socket, ZMQ_NOBLOCK)
-    	assert(rb_zmq.msg_size(data.msg) == message_size.to_i)
-        rb_zmq.send(out_socket, data.msg, ZMQ_NOBLOCK)	        
-    end
-
-	#  Wait till all messages are sent.
-	sleep 2
-	
+end_time = Time.now
+
+elapsed = (end_time.to_f - start_time.to_f) * 1000000
+latency = elapsed / roundtrip_count / 2
+
+puts "message size: %i [B]" % message_size
+puts "roundtrip count: %i" % roundtrip_count
+puts "mean latency: %.3f [us]" % latency
+
+
 
diff --git a/perf/ruby/remote_thr.rb b/perf/ruby/remote_thr.rb
index 6c3392e..7d55f86 100644
--- a/perf/ruby/remote_thr.rb
+++ b/perf/ruby/remote_thr.rb
@@ -18,38 +18,24 @@
 
 require 'librbzmq'
 
-class AssertionFailure < StandardError
+if ARGV.length != 3
+	puts "usage: remote_thr <connect-to> <message-size> <message-count>"
+	Process.exit
 end
+    
+connect_to = ARGV[0]
+message_size = ARGV[1].to_i
+message_count = ARGV[2].to_i
+			
+ctx = Context.new(1, 1)
+s = Socket.new(ctx, PUB);
+s.connect(connect_to);
+
+msg = "#{'0'*message_size}"
 
-def assert(bool, message = 'assertion failure')
-    raise AssertionFailure.new(message) unless bool
+for i in 0...message_count do
+	s.send(msg, 0)
 end
 
-	if ARGV.length != 3
-		puts "usage: remote_thr <out-interface> <message-size> <message-count>"
-		Process.exit
-    end
-        
-	out_interface = ARGV[0]
-	message_size = ARGV[1]
-	message_count = ARGV[2]
-				
-	#  Create 0MQ transport.
-    rb_zmq = Zmq.new();
-    
-    #  Create the wiring.
-    context = rb_zmq.context(1,1);
-    out_socket = rb_zmq.socket(context, ZMQ_PUB);
-    rb_zmq.bind(out_socket, out_interface.to_s);
-	    
-    #  Create message data to send.
-	out_msg = rb_zmq.msg_init_size(message_size.to_s);
-	
-	#  The message loop.
-    for i in 0...message_count.to_i + 1 do
-    	rb_zmq.send(out_socket, out_msg, ZMQ_NOBLOCK);
-   	end
-   	
-    #  Wait till all messages are sent.
-    sleep 2
-    
+sleep 10
+
diff --git a/ruby/Makefile.am b/ruby/Makefile.am
index 7718e24..148daf0 100644
--- a/ruby/Makefile.am
+++ b/ruby/Makefile.am
@@ -3,7 +3,7 @@ INCLUDES = -I$(top_builddir) -I$(top_srcdir)/include -I$(top_builddir)/include
 rblib_LTLIBRARIES = librbzmq.la
 rblibdir = @RUBYDIR@
 
-librbzmq_la_SOURCES = zmq.cpp
+librbzmq_la_SOURCES = rbzmq.cpp
 
 librbzmq_la_LDFLAGS = -version-info @RBLTVER@
 librbzmq_la_CXXFLAGS = -Wall -pedantic -Werror -Wno-long-long
diff --git a/ruby/rbzmq.cpp b/ruby/rbzmq.cpp
new file mode 100644
index 0000000..5cb7f61
--- /dev/null
+++ b/ruby/rbzmq.cpp
@@ -0,0 +1,292 @@
+/*
+    Copyright (c) 2007-2009 FastMQ Inc.
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the Lesser GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    Lesser GNU General Public License for more details.
+
+    You should have received a copy of the Lesser GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <assert.h>
+#include <errno.h>
+#include <string.h>
+#include <zmq.h>
+#include <ruby.h>
+
+static void context_free (void *ctx)
+{
+    if (ctx) {
+       int rc = zmq_term (ctx);
+       assert (rc == 0);
+    }
+}
+
+static VALUE context_alloc (VALUE class_)
+{
+    return rb_data_object_alloc (class_, NULL, 0, context_free);
+}
+
+static VALUE context_initialize (VALUE self_, VALUE app_threads_,
+    VALUE io_threads_)
+{
+    assert (!DATA_PTR (self_));
+    void *ctx = zmq_init (NUM2INT (app_threads_), NUM2INT (io_threads_));
+    if (!ctx) {
+        rb_raise (rb_eRuntimeError, strerror (errno));
+        return Qnil;
+    }
+
+    DATA_PTR (self_) = (void*) ctx;
+    return self_;
+}
+
+static void socket_free (void *s)
+{
+    if (s) {
+       int rc = zmq_close (s);
+       assert (rc == 0);
+    }
+}
+
+static VALUE socket_alloc (VALUE class_)
+{
+    return rb_data_object_alloc (class_, NULL, 0, socket_free);
+}
+
+static VALUE socket_initialize (VALUE self_, VALUE context_, VALUE type_)
+{
+    assert (!DATA_PTR (self_));
+
+    if (strcmp (rb_obj_classname (context_), "Context") != 0) {
+        rb_raise (rb_eArgError, "expected Context object");
+        return Qnil;
+    }
+
+    void *s = zmq_socket (DATA_PTR (context_), NUM2INT (type_));
+    if (!s) {
+        rb_raise (rb_eRuntimeError, strerror (errno));
+        return Qnil;
+    }
+
+    DATA_PTR (self_) = (void*) s;
+    return self_;
+}
+
+/*
+static VALUE rb_setsockopt (VALUE self_, VALUE socket_, VALUE option_,
+    VALUE optval_)
+{
+	//  Get the socket.
+    void* socket;
+    Data_Get_Struct (socket_, void*, socket);
+    
+    int rc = 0;
+
+	if (TYPE (optval_) == T_STRING) {
+
+		//  Forward the code to native 0MQ library.
+		rc = zmq_setsockopt (socket, NUM2INT (option_), 
+			(void *) StringValueCStr (optval_), RSTRING_LEN (optval_));	
+	
+	}
+	else if (TYPE (optval_) == T_FLOAT) {
+
+		double optval = NUM2DBL (optval_);
+		
+		//  Forward the code to native 0MQ library.
+		rc = zmq_setsockopt (socket, NUM2INT (option_), 
+			(void*) &optval, 8);	
+	}
+	
+	else if (TYPE (optval_) == T_FIXNUM) {
+
+		long optval = FIX2LONG (optval_);
+		
+		//  Forward the code to native 0MQ library.
+		rc = zmq_setsockopt (socket, NUM2INT (option_), 
+			(void *) &optval, 4);	
+	
+	}
+	
+	else if (TYPE (optval_) == T_BIGNUM) {
+
+		long optval = NUM2LONG (optval_);
+		
+		//  Forward the code to native 0MQ library.
+		rc = zmq_setsockopt (socket, NUM2INT (option_), 
+			(void *) &optval, 4);	
+	
+	}
+	else if (TYPE (optval_) == T_ARRAY) {
+
+		//  Forward the code to native 0MQ library.
+		rc = zmq_setsockopt (socket, NUM2INT (option_), 
+			(void *) RARRAY_PTR (optval_), RARRAY_LEN (optval_));	
+	
+	}
+	
+	else if (TYPE (optval_) == T_STRUCT) {
+
+		//  Forward the code to native 0MQ library.
+		rc = zmq_setsockopt (socket, NUM2INT (option_), 
+			(void *) RSTRUCT_PTR (optval_), RSTRUCT_LEN (optval_));	
+	
+	}
+	else 
+		rb_raise(rb_eRuntimeError, "Unknown type");    			
+    
+    assert (rc == 0);
+    
+    return self_;
+}
+*/
+
+static VALUE socket_bind (VALUE self_, VALUE addr_)
+{
+    assert (DATA_PTR (self_));
+
+    int rc = zmq_bind (DATA_PTR (self_), rb_string_value_cstr (&addr_));
+    if (rc != 0) {
+        rb_raise (rb_eRuntimeError, strerror (errno));
+        return Qnil;
+    }
+
+    return Qnil;
+}
+
+static VALUE socket_connect (VALUE self_, VALUE addr_)
+{
+    assert (DATA_PTR (self_));
+
+    int rc = zmq_connect (DATA_PTR (self_), rb_string_value_cstr (&addr_));
+    if (rc != 0) {
+        rb_raise (rb_eRuntimeError, strerror (errno));
+        return Qnil;
+    }
+
+    return Qnil;
+}
+
+static VALUE socket_send (VALUE self_, VALUE msg_, VALUE flags_)
+{
+    assert (DATA_PTR (self_));
+
+    Check_Type (msg_, T_STRING);
+
+    zmq_msg_t msg;
+    int rc = zmq_msg_init_size (&msg, RSTRING_LEN (msg_));
+    if (rc != 0) {
+        rb_raise (rb_eRuntimeError, strerror (errno));
+        return Qnil;
+    }
+    memcpy (zmq_msg_data (&msg), RSTRING_PTR (msg_), RSTRING_LEN (msg_));
+ 
+    rc = zmq_send (DATA_PTR (self_), &msg, NUM2INT (flags_));
+    if (rc != 0 && errno == EAGAIN) {
+        rc = zmq_msg_close (&msg);
+        assert (rc == 0);
+        return Qfalse;
+    }
+
+    if (rc != 0) {
+        rb_raise (rb_eRuntimeError, strerror (errno));
+        rc = zmq_msg_close (&msg);
+        assert (rc == 0);
+        return Qnil;
+    }
+
+    rc = zmq_msg_close (&msg);
+    assert (rc == 0);
+    return Qtrue;
+}
+
+static VALUE socket_flush (VALUE self_)
+{
+    assert (DATA_PTR (self_));
+
+    int rc = zmq_flush (DATA_PTR (self_));
+    if (rc != 0) {
+        rb_raise (rb_eRuntimeError, strerror (errno));
+        return Qnil;
+    }
+
+    return Qnil;
+}
+
+static VALUE socket_recv (VALUE self_, VALUE flags_)
+{
+    assert (DATA_PTR (self_));
+
+    zmq_msg_t msg;
+    int rc = zmq_msg_init (&msg);
+    assert (rc == 0);
+
+    rc = zmq_recv (DATA_PTR (self_), &msg, NUM2INT (flags_));
+    if (rc != 0 && errno == EAGAIN) {
+        rc = zmq_msg_close (&msg);
+        assert (rc == 0);
+        return Qnil;
+    }
+
+    if (rc != 0) {
+        rb_raise (rb_eRuntimeError, strerror (errno));
+        rc = zmq_msg_close (&msg);
+        assert (rc == 0);
+        return Qnil;
+    }
+
+    VALUE message = rb_str_new ((char*) zmq_msg_data (&msg),
+        zmq_msg_size (&msg));
+    rc = zmq_msg_close (&msg);
+    assert (rc == 0);
+    return message;
+}
+
+extern "C" void Init_librbzmq ()
+{	
+    VALUE context_type = rb_define_class ("Context", rb_cObject);
+    rb_define_alloc_func (context_type, context_alloc);
+    rb_define_method (context_type, "initialize",
+        (VALUE(*)(...)) context_initialize, 2);
+
+    VALUE socket_type = rb_define_class ("Socket", rb_cObject);
+    rb_define_alloc_func (socket_type, socket_alloc);
+    rb_define_method (socket_type, "initialize",
+        (VALUE(*)(...)) socket_initialize, 2);
+//    rb_define_method (socket_type, "setsockopt",
+//        (VALUE(*)(...)) socket_setsockopt, 2);
+    rb_define_method (socket_type, "bind",
+        (VALUE(*)(...)) socket_bind, 1);
+    rb_define_method (socket_type, "connect",
+        (VALUE(*)(...)) socket_connect, 1);
+    rb_define_method (socket_type, "send",
+        (VALUE(*)(...)) socket_send, 2);
+    rb_define_method (socket_type, "flush",
+        (VALUE(*)(...)) socket_flush, 0);
+    rb_define_method (socket_type, "recv",
+        (VALUE(*)(...)) socket_recv, 1);
+
+    rb_define_global_const ("HWM", INT2NUM (ZMQ_HWM));
+    rb_define_global_const ("LWM", INT2NUM (ZMQ_LWM));
+    rb_define_global_const ("SWAP", INT2NUM (ZMQ_SWAP));
+    rb_define_global_const ("MASK", INT2NUM (ZMQ_MASK));
+    rb_define_global_const ("AFFINITY", INT2NUM (ZMQ_AFFINITY));
+    rb_define_global_const ("IDENTITY", INT2NUM (ZMQ_IDENTITY));
+    rb_define_global_const ("NOBLOCK", INT2NUM (ZMQ_NOBLOCK));
+    rb_define_global_const ("NOFLUSH", INT2NUM (ZMQ_NOFLUSH));
+    rb_define_global_const ("P2P", INT2NUM (ZMQ_P2P));
+    rb_define_global_const ("SUB", INT2NUM (ZMQ_SUB));
+    rb_define_global_const ("PUB", INT2NUM (ZMQ_PUB));
+    rb_define_global_const ("REQ", INT2NUM (ZMQ_REQ));
+    rb_define_global_const ("REP", INT2NUM (ZMQ_REP));
+}
diff --git a/ruby/zmq.cpp b/ruby/zmq.cpp
deleted file mode 100644
index 7ab6143..0000000
--- a/ruby/zmq.cpp
+++ /dev/null
@@ -1,460 +0,0 @@
-/*
-    Copyright (c) 2007-2009 FastMQ Inc.
-
-    This file is part of 0MQ.
-
-    0MQ is free software; you can redistribute it and/or modify it under
-    the terms of the Lesser GNU General Public License as published by
-    the Free Software Foundation; either version 3 of the License, or
-    (at your option) any later version.
-
-    0MQ is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    Lesser GNU General Public License for more details.
-
-    You should have received a copy of the Lesser GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include <zmq.h>
-#include <zmq/err.hpp>
-#include <ruby.h>
-
-//  Class rb_zmq.
-static VALUE rb_zmq;
-
-//  Structure to return received data.
-static VALUE rb_data;
-
-static void rb_free (void *p)
-{
-   	
-} 
-
-static VALUE rb_alloc (VALUE self_)
-{
-    VALUE obj;
-    obj = Data_Wrap_Struct (self_, 0, rb_free, NULL);
-	
-    return obj;
-}
-
-static VALUE rb_msg_init (VALUE self_)
-{
-	zmq_msg_t *msg;
-	msg = new zmq_msg_t;
-	VALUE obj;
-	
-	int rc = zmq_msg_init (msg);
-	if (rc == -1) {
-        assert (errno == ENOMEM);
-        rb_raise(rb_eRuntimeError, "Out of memory"); 
-    }	
-	
-	obj = Data_Wrap_Struct (rb_zmq, 0, rb_free, msg);
-	return obj;
-}
-
-static VALUE rb_msg_init_size (VALUE self_, VALUE size_)
-{
-	zmq_msg_t *msg;
-	msg = new zmq_msg_t;
-	VALUE obj;
-
-	//  Forward the code to zmq library.	
-	int rc = zmq_msg_init_size (msg, NUM2INT (size_));
-	if (rc == -1) {
-        assert (errno == ENOMEM);
-        rb_raise(rb_eRuntimeError, "Out of memory"); 
-    }	
-
-	obj = Data_Wrap_Struct (rb_zmq, 0, rb_free, msg);
-	return obj;
-}
-
-static VALUE rb_msg_init_data (VALUE self_, VALUE data_, VALUE size_)
-{
-	//  Get the message.
-	zmq_msg_t *msg;
-	VALUE obj;
-	msg = new zmq_msg_t;
-
-	//  Forward the code to zmq library.		
-	int rc = zmq_msg_init_data (msg, StringValueCStr (data_), 
-		NUM2INT (size_), rb_free);
-	assert (rc == 0);
-	
-	obj = Data_Wrap_Struct (rb_zmq, 0, rb_free, msg);
-	return obj;
-}
-
-static VALUE rb_msg_close (VALUE self_, VALUE msg_)
-{
-	//  Get the message.
-    zmq_msg_t* msg;
-    Data_Get_Struct (msg_, zmq_msg_t, msg);
-
-	//  Forward the code to zmq library.    
-	int rc = zmq_close (msg);
-	assert (rc == 0);
-	
-	return self_;
-}
-
-static VALUE rb_msg_move (VALUE self_, VALUE src_)
-{
-    //  Get the message.
-    zmq_msg_t* src;
-    Data_Get_Struct (src_, zmq_msg_t, src);
-	
-	zmq_msg_t *dest;
-	dest = new zmq_msg_t;
-	VALUE obj;
-
-	//  Forward the code to zmq library.	
-	int rc = zmq_msg_move (dest, src);
-	assert (rc == 0);
-	
-	obj = Data_Wrap_Struct (rb_zmq, 0, rb_free, dest);
-	return obj;
-}
-
-
-static VALUE rb_msg_copy (VALUE self_, VALUE src_)
-{
-    //  Get the message.
-    zmq_msg_t* src;
-    Data_Get_Struct (src_, zmq_msg_t, src);
-	
-	zmq_msg_t *dest;
-	dest = new zmq_msg_t;
-	VALUE obj;
-
-	//  Forward the code to zmq library.	
-	int rc = zmq_msg_copy (dest, src);
-	assert (rc == 0);
-	
-	obj = Data_Wrap_Struct (rb_zmq, 0, rb_free, dest);
-	return obj;
-}
-
-static VALUE rb_msg_data (VALUE self_, VALUE msg_)
-{
-    //  Get the message.
-    zmq_msg_t* msg;
-    Data_Get_Struct (msg_, zmq_msg_t, msg);
-
-	const char* data;
-
-	//  Forward the code to zmq library.
-	data = (const char*) zmq_msg_data (msg);
-	
-	return rb_str_new (data, zmq_msg_size (msg));
-}
-
-static VALUE rb_msg_size (VALUE self_, VALUE msg_)
-{
-    //  Get the message.
-    zmq_msg_t* msg;
-    Data_Get_Struct (msg_, zmq_msg_t, msg);
-    
-   	//  Forward the code to zmq library.
-	return INT2NUM (zmq_msg_size (msg));
-}
-
-static VALUE rb_msg_type (VALUE self_, VALUE msg_)
-{
-    //  Get the message.
-    zmq_msg_t* msg;
-    Data_Get_Struct (msg_, zmq_msg_t, msg);
-
-	//  Forward the code to zmq library.    
-	return INT2NUM (zmq_msg_type (msg));
-}
-
-static VALUE rb_init (VALUE self_)
-{
-	return self_;
-}
-
-static VALUE rb_context (VALUE self_, VALUE app_threads_, VALUE io_threads_)
-{
-	void *context;
-	VALUE obj;
-
-	//  Forward the code to zmq library.	
-	context = zmq_init (NUM2INT (app_threads_), NUM2INT (io_threads_));	
-	if (context == NULL) {
-        assert (errno == EINVAL);
-        rb_raise(rb_eRuntimeError, "Invalid argument"); 
-    }
-
-	obj = Data_Wrap_Struct (rb_zmq, 0, free, context);
-    return self_;
-}
-
-static VALUE rb_term (VALUE self_, VALUE context_)
-{
-	//  Get the context.
-    void* context;
-    Data_Get_Struct (context_, void*, context);
-
-	//  Forward the code to zmq library.    
-   	int rc = zmq_term ((void*) context);
-   	assert (rc == 0);
-   	
-    return self_;
-}
-
-static VALUE rb_socket (VALUE self_, VALUE context_, VALUE type_)
-{
-	//  Get the context.
-    void* context;
-    Data_Get_Struct (context_, void*, context);
-    
-    void* socket = NULL;
-    VALUE obj;
-
-    //  Forward the call to native 0MQ library.
-	socket = zmq_socket(context, NUM2INT (type_));
-	if (socket == NULL) {
-        assert (errno == EMFILE || errno == EINVAL);
-        if (errno == EMFILE)
-	        rb_raise(rb_eRuntimeError, "Too many threads"); 
-        else
-	        rb_raise(rb_eRuntimeError, "Invalid argument"); 
-    }
-	
-    obj = Data_Wrap_Struct(rb_zmq, 0, free, socket);
-    return obj;
-}
-
-static VALUE rb_close (VALUE self_, VALUE socket_)
-{
-    //  Get the message.
-    void* socket;
-    Data_Get_Struct (socket_, void*, socket);
-    
-    //  Forward the call to native 0MQ library.
-    int rc = zmq_close (socket);
-    assert (rc == 0);
-    return self_;
-}	
-
-static VALUE rb_setsockopt (VALUE self_, VALUE socket_, VALUE option_,
-    VALUE optval_)
-{
-	//  Get the socket.
-    void* socket;
-    Data_Get_Struct (socket_, void*, socket);
-    
-    int rc = 0;
-
-	if (TYPE (optval_) == T_STRING) {
-
-		//  Forward the code to native 0MQ library.
-		rc = zmq_setsockopt (socket, NUM2INT (option_), 
-			(void *) StringValueCStr (optval_), RSTRING_LEN (optval_));	
-	
-	}
-	else if (TYPE (optval_) == T_FLOAT) {
-
-		double optval = NUM2DBL (optval_);
-		
-		//  Forward the code to native 0MQ library.
-		rc = zmq_setsockopt (socket, NUM2INT (option_), 
-			(void*) &optval, 8);	
-	}
-	
-	else if (TYPE (optval_) == T_FIXNUM) {
-
-		long optval = FIX2LONG (optval_);
-		
-		//  Forward the code to native 0MQ library.
-		rc = zmq_setsockopt (socket, NUM2INT (option_), 
-			(void *) &optval, 4);	
-	
-	}
-	
-	else if (TYPE (optval_) == T_BIGNUM) {
-
-		long optval = NUM2LONG (optval_);
-		
-		//  Forward the code to native 0MQ library.
-		rc = zmq_setsockopt (socket, NUM2INT (option_), 
-			(void *) &optval, 4);	
-	
-	}
-	else if (TYPE (optval_) == T_ARRAY) {
-
-		//  Forward the code to native 0MQ library.
-		rc = zmq_setsockopt (socket, NUM2INT (option_), 
-			(void *) RARRAY_PTR (optval_), RARRAY_LEN (optval_));	
-	
-	}
-	
-	else if (TYPE (optval_) == T_STRUCT) {
-
-		//  Forward the code to native 0MQ library.
-		rc = zmq_setsockopt (socket, NUM2INT (option_), 
-			(void *) RSTRUCT_PTR (optval_), RSTRUCT_LEN (optval_));	
-	
-	}
-	else 
-		rb_raise(rb_eRuntimeError, "Unknown type");    			
-    
-    assert (rc == 0);
-    
-    return self_;
-}
-
-static VALUE rb_bind (VALUE self_, VALUE socket_, VALUE addr_)
-{
-	//  Get the socket.
-    void* socket;
-    Data_Get_Struct (socket_, void*, socket);
-    
-   	//  Forward the code to native 0MQ library.    
-    int rc = zmq_bind (socket, StringValueCStr (addr_));
-    if (rc == -1) {
-        assert (errno == EINVAL || errno == EADDRINUSE);
-        if (errno == EINVAL)
-            rb_raise(rb_eRuntimeError, "Invalid argument"); 
-        else
-            rb_raise(rb_eRuntimeError, "Address in use"); 
-    }
-    
-    return self_;
-}
-
-static VALUE rb_connect (VALUE self_, VALUE socket_, VALUE addr_)
-{
-	//  Get the socket.
-    void* socket;
-    Data_Get_Struct (socket_, void*, socket);
-
-   	//  Forward the code to native 0MQ library.
-	int rc = zmq_connect (socket, StringValueCStr (addr_));
-    if (rc == -1) {
-        assert (errno == EINVAL || errno == EADDRINUSE);
-        if (errno == EINVAL)
-            rb_raise(rb_eRuntimeError, "Invalid argument"); 
-        else
-             rb_raise(rb_eRuntimeError, "Address in use");
-    }
-    return self_;
-}
-
-static VALUE rb_send (VALUE self_, VALUE socket_, VALUE msg_, VALUE flags_)
-{
-	//  Get the socket.
-    void* socket;
-    Data_Get_Struct (socket_, void*, socket);
-    
-    //  Get the message.
-    zmq_msg_t *msg;
-    Data_Get_Struct (msg_, zmq_msg_t, msg);
-
-   	//  Forward the code to native 0MQ library.    
-    int rc = zmq_send (socket, msg, NUM2INT (flags_));
-    assert (rc == 0 || (rc == -1 && errno == EAGAIN));
-
-    return INT2NUM (rc);
-}
-
-static VALUE rb_flush (VALUE self_, VALUE socket_)
-{
-	//  Get the socket.
-    void* socket;
-    Data_Get_Struct (socket_, void*, socket);
-
-   	//  Forward the code to native 0MQ library.    
-    int rc = zmq_flush (socket);
-    assert (rc == 0);
-    
-    return self_;
-}
-
-static VALUE rb_recv (VALUE self_, VALUE socket_, VALUE flags_)
-{
-	//  Get the socket.
-    void* socket;
-    Data_Get_Struct (socket_, void*, socket);
-    
-    //  Get the message.
-    zmq_msg_t* msg;
-    msg = new zmq_msg_t;
-    VALUE obj;
-
-   	//  Forward the code to native 0MQ library.       
-	int rc = zmq_recv (socket, msg, NUM2INT (flags_));
-	assert (rc == 0 || (rc == -1 && errno == EAGAIN));
-
-	obj = Data_Wrap_Struct(rb_data, 0, rb_free, msg);
-	    
-    return rb_struct_new (obj, rc, NULL);
-}
-
-extern "C"
-void Init_librbzmq() {
-	
-	//  Define the rb_zmq class.
-    rb_zmq = rb_define_class ("Zmq", rb_cObject);
-	
-	//  Define allocation function for rb_zmq class.
-    rb_define_alloc_func (rb_zmq, rb_alloc);
-    
-    //  Parameters: <name_of_class> <name_of_method_aaccessible_from_ruby>
-    //  <name_of_method_in_the_class> <number_of_arguments> 
-    //  number of arguments is alqays except for the 'VALUE self_' argument 
-    //  (this pointer).
-    rb_define_method (rb_zmq, "msg_init", (VALUE(*)(...)) rb_msg_init, 0);
-    rb_define_method (rb_zmq, "msg_init_size", (VALUE(*)(...)) 
-    	rb_msg_init_size, 1);
-    rb_define_method (rb_zmq, "msg_init_data", (VALUE(*)(...)) 
-    	rb_msg_init_data, 3);
-    rb_define_method (rb_zmq, "msg_close", (VALUE(*)(...)) rb_msg_close, 1);
-    rb_define_method (rb_zmq, "msg_move", (VALUE(*)(...)) rb_msg_move, 1);
-    rb_define_method (rb_zmq, "msg_copy", (VALUE(*)(...)) rb_msg_copy, 1);
-    rb_define_method (rb_zmq, "msg_data", (VALUE(*)(...)) rb_msg_data, 1);
-    rb_define_method (rb_zmq, "msg_size", (VALUE(*)(...)) rb_msg_size, 1);
-    rb_define_method (rb_zmq, "msg_type", (VALUE(*)(...)) rb_msg_type, 1);
-  
-    rb_define_method (rb_zmq, "initialize", (VALUE(*)(...)) rb_init, 0);
-	rb_define_method (rb_zmq, "term", (VALUE(*)(...)) rb_term, 1);  
-    rb_define_method (rb_zmq, "free", (VALUE(*)(...)) rb_free, 0); 
-	
-	rb_define_method (rb_zmq, "context", (VALUE(*)(...)) rb_context, 2);
-    rb_define_method (rb_zmq, "socket", (VALUE(*)(...)) rb_socket, 2);
-    rb_define_method (rb_zmq, "close", (VALUE(*)(...)) rb_close, 1);
-    rb_define_method (rb_zmq, "setsockopt", (VALUE(*)(...)) rb_setsockopt, 3);    
-    rb_define_method (rb_zmq, "bind", (VALUE(*)(...)) rb_bind, 2);
-    rb_define_method (rb_zmq, "connect", (VALUE(*)(...)) rb_connect, 2);
-    rb_define_method (rb_zmq, "send", (VALUE(*)(...)) rb_send, 3);
-    rb_define_method (rb_zmq, "flush", (VALUE(*)(...)) rb_flush, 1);
-    rb_define_method (rb_zmq, "recv", (VALUE(*)(...)) rb_recv, 2);
-  
-	//  Define structure to hold data that are returned from receive function.
-    rb_data = rb_struct_define (NULL, "msg", "rc", NULL);
-    rb_define_const (rb_zmq, "DATA", rb_data);
-
-	//  Define global constants.
-    rb_define_global_const ("ZMQ_MAX_VSM_SIZE", INT2NUM (ZMQ_MAX_VSM_SIZE));
-    rb_define_global_const ("ZMQ_GAP", INT2NUM (ZMQ_GAP));
-    rb_define_global_const ("ZMQ_DELIMITER", INT2NUM (ZMQ_DELIMITER));
-    rb_define_global_const ("ZMQ_VSM", INT2NUM (ZMQ_VSM));
-    rb_define_global_const ("ZMQ_HWM", INT2NUM (ZMQ_HWM));
-    rb_define_global_const ("ZMQ_SWAP", INT2NUM (ZMQ_SWAP));
-    rb_define_global_const ("ZMQ_MASK", INT2NUM (ZMQ_MASK));
-    rb_define_global_const ("ZMQ_AFFINITY", INT2NUM (ZMQ_AFFINITY));
-    rb_define_global_const ("ZMQ_IDENTITY", INT2NUM (ZMQ_IDENTITY));
-    rb_define_global_const ("ZMQ_NOBLOCK", INT2NUM (ZMQ_NOBLOCK));
-    rb_define_global_const ("ZMQ_NOFLUSH", INT2NUM (ZMQ_NOFLUSH));
-    rb_define_global_const ("ZMQ_P2P", INT2NUM (ZMQ_P2P));
-    rb_define_global_const ("ZMQ_SUB", INT2NUM (ZMQ_SUB));
-    rb_define_global_const ("ZMQ_PUB", INT2NUM (ZMQ_PUB));
-    rb_define_global_const ("ZMQ_REQ", INT2NUM (ZMQ_REQ));
-    rb_define_global_const ("ZMQ_REP", INT2NUM (ZMQ_REP));
-
-}