X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?p=scpubgit%2FObject-Remote.git;a=blobdiff_plain;f=lib%2FObject%2FRemote%2FMiniLoop.pm;h=faa4a38d371911d60ecfaa452447ba3f8eb5c772;hp=18c0b478ee83f038b2524b66a4b6e7335804b1f1;hb=8c3529062a426181861d58ee59fb8f10e0be68e5;hpb=6b7b2732b7cc6b6c626469f2e6300b7012caef07

diff --git a/lib/Object/Remote/MiniLoop.pm b/lib/Object/Remote/MiniLoop.pm
index 18c0b47..faa4a38 100644
--- a/lib/Object/Remote/MiniLoop.pm
+++ b/lib/Object/Remote/MiniLoop.pm
@@ -2,12 +2,20 @@ package Object::Remote::MiniLoop;
 
 use IO::Select;
 use Time::HiRes qw(time);
-use Object::Remote::Logging qw( :log :dlog );
+use Object::Remote::Logging qw( :log :dlog router );
 use Moo;
 
-# this is ro because we only actually set it using local in sub run
+BEGIN { 
+  $SIG{PIPE} = sub { log_debug { "Got a PIPE signal" } };
+  
+  router()->exclude_forwarding
+}
 
+# this is ro because we only actually set it using local in sub run
 has is_running => (is => 'ro', clearer => 'stop');
+#maximum duration that select() will block - undef means indefinite,
+#0 means no blocking, otherwise maximum time in seconds
+has block_duration => ( is => 'rw' );
 
 has _read_watches => (is => 'ro', default => sub { {} });
 has _read_select => (is => 'ro', default => sub { IO::Select->new });
@@ -38,19 +46,6 @@ sub watch_io {
   my ($self, %watch) = @_;
   my $fh = $watch{handle};
   Dlog_debug { "Adding IO watch for $_" } $fh;
-
-  #TODO if this works out non-blocking support
-  #will need to be integrated in a way that
-  #is compatible with Windows which has no
-  #non-blocking support
-  if (0) {
-    Dlog_warn { "setting file handle to be non-blocking: $_" } $fh;
-    use Fcntl qw(F_GETFL F_SETFL O_NONBLOCK);
-    my $flags = fcntl($fh, F_GETFL, 0)
-      or die "Can't get flags for the socket: $!\n";
-    $flags = fcntl($fh, F_SETFL, $flags | O_NONBLOCK)
-      or die "Can't set flags for the socket: $!\n"; 
-  }
   
   if (my $cb = $watch{on_read_ready}) {
     log_trace { "IO watcher is registering with select for reading" };
@@ -82,23 +77,43 @@ sub unwatch_io {
   return;
 }
 
+sub _sort_timers {
+  my ($self, @new) = @_;
+  my $timers = $self->_timers; 
+  
+  log_trace { "Sorting timers" };
+  
+  @{$timers} = sort { $a->[0] <=> $b->[0] } @{$timers}, @new;
+  return;   
+}
+
 sub watch_time {
   my ($self, %watch) = @_;
-  my $at = $watch{at} || do {
-    die "watch_time requires at or after" unless my $after = $watch{after};
-    time() + $after;
-  };
+  my $at; 
+  
+  Dlog_trace { "watch_time() invoked with $_" } \%watch;
+ 
+  if (exists($watch{every})) {
+    $at = time() + $watch{every};
+  } elsif (exists($watch{after})) {
+    $at = time() + $watch{after}; 
+  } elsif (exists($watch{at})) {
+    $at = $watch{at}; 
+  } else {
+    die "watch_time requires every, after or at";
+  }
+  
   die "watch_time requires code" unless my $code = $watch{code};
   my $timers = $self->_timers;
-  my $new = [ $at => $code ];
-  @{$timers} = sort { $a->[0] <=> $b->[0] } @{$timers}, $new;
-  log_debug { "Created new timer that expires at '$at'" };
+  my $new = [ $at => $code, $watch{every} ];
+  $self->_sort_timers($new); 
+  log_debug { "Created new timer with id '$new' that expires at '$at'" };
   return "$new";
 }
 
 sub unwatch_time {
   my ($self, $id) = @_;
-  log_debug { "Removing timer with id of '$id'" };
+  log_trace { "Removing timer with id of '$id'" };
   @$_ = grep !($_ eq $id), @$_ for $self->_timers;
   return;
 }
@@ -106,12 +121,7 @@ sub unwatch_time {
 sub _next_timer_expires_delay {
   my ($self) = @_;
   my $timers = $self->_timers;
-  #undef means no timeout, select only returns
-  #when data is ready - when the system
-  #deadlocks the chatter from the timeout in
-  #select clogs up the logs
-  #TODO should make this an attribute
-  my $delay_max = undef;
+  my $delay_max = $self->block_duration;
     
   return $delay_max unless @$timers;
   my $duration = $timers->[0]->[0] - time;
@@ -136,24 +146,11 @@ sub loop_once {
   my $write_count = 0; 
   my @c = caller;
   my $wait_time = $self->_next_timer_expires_delay;
-  log_trace {  sprintf("Run loop: loop_once() has been invoked by $c[1]:$c[2] with read:%i write:%i select timeout:%s",
-      scalar(keys(%$read)), scalar(keys(%$write)), defined $wait_time ? $wait_time : 'indefinite' ) };
-  #TODO The docs state that select() in some instances can return a socket as ready to
-  #read data even if reading from it would block and the recomendation is to set
-  #handles used with select() as non-blocking but Perl on Windows can not set a 
-  #handle to use non-blocking IO - If Windows is not one of the operating
-  #systems where select() returns a handle that could block it would work to
-  #enable non-blocking mode only under Posix - the non-blocking sysread()
-  #logic would work unmodified for both blocking and non-blocking handles
-  #under Posix and Windows.
+  log_trace {
+    sprintf("Run loop: loop_once() has been invoked by $c[1]:$c[2] with read:%i write:%i select timeout:%s",
+      scalar(keys(%$read)), scalar(keys(%$write)), defined $wait_time ? $wait_time : 'indefinite' )
+  };
   my ($readable, $writeable) = IO::Select->select(
-    #TODO how come select() isn't used to identify handles with errors on them?
-    #TODO is there a specific reason for a half second maximum wait duration?
-    #The two places I've found for the runloop to be invoked don't return control
-    #to the caller until a controlling variable interrupts the loop that invokes
-    #loop_once() - is this to allow that variable to be polled and exit the
-    #run loop? If so why isn't that behavior event driven and causes select() to
-    #return? 
     $self->_read_select, $self->_write_select, undef, $wait_time
   ); 
   log_trace { 
@@ -173,7 +170,6 @@ sub loop_once {
     $read_count++;
     $read->{$fh}();
     last if $Loop_Entered;
-#    $read->{$fh}() if $read->{$fh};
   }
   log_trace { "Writing to all ready filehandles" };
   foreach my $fh (@$writeable) {
@@ -181,27 +177,39 @@ sub loop_once {
     $write_count++;
     $write->{$fh}();
     last if $Loop_Entered;
-#    $write->{$fh}() if $write->{$fh};
   }
+  
   log_trace { "Read from $read_count filehandles; wrote to $write_count filehandles" };
   my $timers = $self->_timers;
   my $now = time();
   log_trace { "Checking timers" };
   while (@$timers and $timers->[0][0] <= $now) {
-    Dlog_debug { "Found timer that needs to be executed: $_" } $timers->[0];
-    (shift @$timers)->[1]->();
+    my $active = $timers->[0]; 
+    Dlog_trace { "Found timer that needs to be executed: '$active'" };
+     
+    if (defined($active->[2])) {
+      #handle the case of an 'every' timer
+      $active->[0] = time() + $active->[2]; 
+      Dlog_trace { "scheduling timer for repeat execution at $_"} $active->[0];
+      $self->_sort_timers;
+    } else {
+      #it doesn't repeat again so get rid of it  
+      shift(@$timers);    
+    }
+
+    #execute the timer
+    $active->[1]->();
+     
     last if $Loop_Entered;
   }
+  
   log_trace { "Run loop: single loop is completed" };
   return;
 }
 
-#::Node and ::ConnectionServer use the want_run() / want_stop()
-#counter to cause a run-loop to execute while something is active;
-#the futures do this via a different mechanism
 sub want_run {
   my ($self) = @_;
-  Dlog_debug { "Run loop: Incrimenting want_running, is now $_" }
+  Dlog_debug { "Run loop: Incremeting want_running, is now $_" }
     ++$self->{want_running};
 }
 
@@ -223,11 +231,6 @@ sub want_stop {
     --$self->{want_running};
 }
 
-#TODO Hypothesis: Futures invoke run() which gives that future
-#it's own localized is_running attribute - any adjustment to the
-#is_running attribute outside of that future will not effect that
-#future so each future winds up able to call run() and stop() at 
-#will with out interfering with each other 
 sub run {
   my ($self) = @_;
   log_trace { "Run loop: run() invoked" };