X-Git-Url: http://dxcluster.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=perl%2FMsg.pm;h=ec07d61da6878851f6b8f11f19aba403e5729cbd;hb=0bbd79b480f385485ce6b0be25f9dee47e955eb1;hp=c730773aff702f9c1cbb4d79cad00932dd2f5036;hpb=2f1b948ea733e0ece1909a31987dc8f03044e851;p=spider.git

diff --git a/perl/Msg.pm b/perl/Msg.pm
index c730773a..ec07d61d 100644
--- a/perl/Msg.pm
+++ b/perl/Msg.pm
@@ -15,8 +15,6 @@ use IO::Select;
 use IO::Socket;
 use DXDebug;
 use Timer;
-use Errno qw(EWOULDBLOCK EAGAIN EINPROGRESS);
-use POSIX qw(F_GETFL F_SETFL O_NONBLOCK);
 
 use vars qw(%rd_callbacks %wt_callbacks %er_callbacks $rd_handles $wt_handles $er_handles $now %conns $noconns);
 
@@ -28,6 +26,27 @@ $wt_handles   = IO::Select->new();
 $er_handles   = IO::Select->new();
 
 $now = time;
+my $blocking_supported = 0;
+
+BEGIN {
+    # Checks if blocking is supported
+    eval {
+        require POSIX; POSIX->import(qw (F_SETFL F_GETFL O_NONBLOCK));
+    };
+    $blocking_supported = 1 unless $@;
+
+	# import as many of these errno values as are available
+	eval {
+		require Errno; Errno->import(qw(EAGAIN EINPROGRESS EWOULDBLOCK));
+	};
+}
+
+my $w = $^W;
+$^W = 0;
+my $eagain = eval {EAGAIN()};
+my $einprogress = eval {EINPROGRESS()};
+my $ewouldblock = eval {EWOULDBLOCK()};
+$^W = $w;
 
 #
 #-----------------------------------------------------------------
@@ -71,6 +90,8 @@ sub set_rproc
 
 sub blocking
 {
+	return unless $blocking_supported;
+	
 	my $flags = fcntl ($_[0], F_GETFL, 0);
 	if ($_[1]) {
 		$flags &= ~O_NONBLOCK;
@@ -135,10 +156,9 @@ sub connect {
 	
 	blocking($sock, 0);
 	my $ip = gethostbyname($to_host);
-	my $r = $sock->connect($to_port, $ip);
-	unless ($r) {
-		return undef unless $! == EINPROGRESS;
-	}
+#	my $r = $sock->connect($to_port, $ip);
+	my $r = connect($sock, pack_sockaddr_in($to_port, $ip));
+	return undef unless $r || _err_will_block($!);
 	
 	$conn->{sock} = $sock;
     
@@ -167,8 +187,6 @@ sub disconnect {
 	$call ||= 'unallocated';
 	dbg('connll', "Connection $call disconnected");
 	
-    set_event_handler ($sock, read => undef, write => undef, error => undef);
-
 	unless ($^O =~ /^MS/i) {
 		kill 'TERM', $conn->{pid} if exists $conn->{pid};
 	}
@@ -181,6 +199,7 @@ sub disconnect {
 	}
 
 	return unless defined($sock);
+    set_event_handler ($sock, read => undef, write => undef, error => undef);
     shutdown($sock, 3);
 	close($sock);
 }
@@ -264,8 +283,25 @@ sub _send {
     1;  # Success
 }
 
+sub dup_sock
+{
+	my $conn = shift;
+	my $oldsock = $conn->{sock};
+	my $rc = $rd_callbacks{$oldsock};
+	my $wc = $wt_callbacks{$oldsock};
+	my $ec = $er_callbacks{$oldsock};
+	my $sock = $oldsock->new_from_fd($oldsock, "w+");
+	if ($sock) {
+		set_event_handler($oldsock, read=>undef, write=>undef, error=>undef);
+		$conn->{sock} = $sock;
+		set_event_handler($sock, read=>$rc, write=>$wc, error=>$ec);
+		$oldsock->close;
+	}
+}
+
 sub _err_will_block {
-	return ($_[0] == EAGAIN || $_[0] == EWOULDBLOCK || $_[0] == EINPROGRESS);
+	return 0 unless $blocking_supported;
+	return ($_[0] == $eagain || $_[0] == $ewouldblock || $_[0] == $einprogress);
 }
 
 sub close_on_empty
@@ -425,7 +461,6 @@ sub event_loop {
         last unless ($rd_handles->count() || $wt_handles->count());
         
 		($rset, $wset) = IO::Select->select($rd_handles, $wt_handles, $er_handles, $timeout);
-		$now = time;
 		
         foreach $e (@$eset) {
             &{$er_callbacks{$e}}($e) if exists $er_callbacks{$e};