ChangeLogTag:Tue May 18 10:14:47 1999 Carlos O'Ryan <coryan@cs.wustl.edu>

1 files changed, 309 insertions, 0 deletions

diff --git a/ace/FlReactor.cpp b/ace/FlReactor.cpp
new file mode 100644
index 00000000000..e4a9e7128f5
--- /dev/null
+++ b/ace/FlReactor.cpp
@@ -0,0 +1,309 @@
+// $Id$
+
+#define ACE_BUILD_DLL
+#include "ace/FlReactor.h"
+#include "ace/Synch_T.h"
+
+ACE_RCSID(ace, FlReactor, "$Id$")
+
+#if defined (ACE_HAS_FL)
+
+#include "FL/Fl.h"
+
+ACE_ALLOC_HOOK_DEFINE (ACE_FlReactor)
+
+// Must be called with lock held
+ACE_FlReactor::ACE_FlReactor (size_t size,
+			      int restart,
+			      ACE_Sig_Handler *h)
+  : ACE_Select_Reactor (size, restart, h)
+{
+  // When the ACE_Select_Reactor is constructed it creates the notify
+  // pipe and registers it with the register_handler_i() method. The
+  // FlReactor overloads this method BUT because the
+  // register_handler_i occurs when constructing the base class
+  // ACE_Select_Reactor, the ACE_Select_Reactor register_handler_i()
+  // is called not the FlReactor register_handler_i().  This means
+  // that the notify pipe is registered with the ACE_Select_Reactor
+  // event handling code not the FlReactor and so notfications don't
+  // work.  To get around this we simply close and re-opened the
+  // notification handler in the constructor of the FlReactor.
+
+#if defined (ACE_MT_SAFE) && (ACE_MT_SAFE != 0)
+  this->notify_handler_->close ();
+  this->notify_handler_->open (this, 0);
+#endif /* ACE_MT_SAFE */
+}
+
+ACE_FlReactor::~ACE_FlReactor (void)
+{
+}
+
+// This is just the <wait_for_multiple_events> from ace/Reactor.cpp
+// but we use the Fl functions to wait for an event, not <select>
+
+int
+ACE_FlReactor::wait_for_multiple_events (ACE_Select_Reactor_Handle_Set &handle_set,
+					 ACE_Time_Value *max_wait_time)
+{
+  ACE_TRACE ("ACE_FlReactor::wait_for_multiple_events");
+  int nfound;
+
+  do
+    {
+      max_wait_time = this->timer_queue_->calculate_timeout (max_wait_time);
+
+      size_t width = this->handler_rep_.max_handlep1 ();
+      handle_set.rd_mask_ = this->wait_set_.rd_mask_;
+      handle_set.wr_mask_ = this->wait_set_.wr_mask_;
+      handle_set.ex_mask_ = this->wait_set_.ex_mask_;
+
+      // Check to make sure our handle's are all usable.
+      ACE_Select_Reactor_Handle_Set temp_set = handle_set;
+
+      ACE_Time_Value zero = ACE_Time_Value::zero;
+      if (ACE_OS::select (width,
+                          temp_set.rd_mask_,
+                          temp_set.wr_mask_,
+                          temp_set.ex_mask_,
+                          &zero) == -1)
+        return -1; // Bad file arguments...
+
+      // Instead of waiting using <select>, just use the Fl mechanism
+      // to wait for one or more events...
+
+      // Wait for something to happen.
+      double t = 0;
+      if (max_wait_time != 0)
+        t = max_wait_time->sec () + max_wait_time->usec () / 1000000.0F;
+
+      while (t > 0) {
+        t = Fl::wait (t);
+      }
+
+      // Reset the width, in case it changed during the upcalls.
+      width = this->handler_rep_.max_handlep1 ();
+
+      // Now actually read the result needed by the <Select_Reactor>
+      // using <select>.
+      zero = ACE_Time_Value::zero;
+      nfound = ACE_OS::select (width,
+                               handle_set.rd_mask_,
+                               handle_set.wr_mask_,
+                               handle_set.ex_mask_,
+                               &zero);
+
+    } while (nfound == -1 && this->handle_error () > 0);
+
+  if (nfound > 0)
+    {
+#if !defined (ACE_WIN32)
+      handle_set.rd_mask_.sync (this->handler_rep_.max_handlep1 ());
+      handle_set.wr_mask_.sync (this->handler_rep_.max_handlep1 ());
+      handle_set.ex_mask_.sync (this->handler_rep_.max_handlep1 ());
+#endif /* ACE_WIN32 */
+    }
+  return nfound; // Timed out or input available
+}
+
+void
+ACE_FlReactor::fl_io_proc (int fd, void* reactor)
+{
+  ACE_FlReactor *self = ACE_static_cast(ACE_FlReactor *, reactor);
+  ACE_HANDLE handle = ACE_reinterpret_cast(ACE_HANDLE, fd);
+
+  // my copy isn't const.
+  ACE_Time_Value zero = ACE_Time_Value::zero;
+
+  ACE_Select_Reactor_Handle_Set wait_set;
+
+  // Deal with one file event.
+
+  // - read which kind of event
+  if (self->wait_set_.rd_mask_.is_set (handle))
+    wait_set.rd_mask_.set_bit (handle);
+  if (self->wait_set_.wr_mask_.is_set (handle))
+    wait_set.wr_mask_.set_bit (handle);
+  if (self->wait_set_.ex_mask_.is_set (handle))
+    wait_set.ex_mask_.set_bit (handle);
+
+  int result = ACE_OS::select (fd + 1,
+			       wait_set.rd_mask_,
+			       wait_set.wr_mask_,
+			       wait_set.ex_mask_, &zero);
+
+  ACE_Select_Reactor_Handle_Set dispatch_set;
+
+  // - Use only that one file event (removes events for other files).
+  if (result > 0)
+    {
+      if (wait_set.rd_mask_.is_set (handle))
+	dispatch_set.rd_mask_.set_bit (handle);
+      if (wait_set.wr_mask_.is_set (handle))
+	dispatch_set.wr_mask_.set_bit (handle);
+      if (wait_set.ex_mask_.is_set (handle))
+	dispatch_set.ex_mask_.set_bit (handle);
+
+      self->dispatch (1, dispatch_set);
+    }
+}
+
+void
+ACE_FlReactor::fl_timeout_proc (void* reactor)
+{
+  ACE_FlReactor *self = ACE_static_cast (ACE_FlReactor *, reactor);
+
+  // Deal with any timer events
+  ACE_Select_Reactor_Handle_Set handle_set;
+  self->dispatch (0, handle_set);
+  self->reset_timeout ();
+}
+
+
+int
+ACE_FlReactor::register_handler_i (ACE_HANDLE handle,
+				   ACE_Event_Handler *handler,
+				   ACE_Reactor_Mask mask)
+{
+  ACE_TRACE ("ACE_FlReactor::register_handler_i");
+
+  int result = ACE_Select_Reactor::register_handler_i (handle,
+                                                       handler, mask);
+  if (result == -1)
+    return -1;
+
+  int condition = 0;
+
+  if (ACE_BIT_ENABLED (mask, ACE_Event_Handler::READ_MASK))
+    ACE_SET_BITS (condition, FL_READ);
+  if (ACE_BIT_ENABLED (mask, ACE_Event_Handler::WRITE_MASK))
+    ACE_SET_BITS (condition, FL_WRITE);
+  if (ACE_BIT_ENABLED (mask, ACE_Event_Handler::EXCEPT_MASK))
+    ACE_SET_BITS (condition, FL_EXCEPT);
+  if (ACE_BIT_ENABLED (mask, ACE_Event_Handler::ACCEPT_MASK))
+    ACE_SET_BITS (condition, FL_READ);
+  if (ACE_BIT_ENABLED (mask, ACE_Event_Handler::CONNECT_MASK))
+    {
+      ACE_SET_BITS (condition, FL_WRITE); // connected, you may write
+      ACE_SET_BITS (condition, FL_READ);  // connected, you have data/err
+    }
+
+  if (condition != 0)
+    {
+      Fl::add_fd (ACE_reinterpret_cast(int,handle),
+                  ACE_FlReactor::fl_io_proc,
+                  this);
+    }
+  return 0;
+}
+
+int
+ACE_FlReactor::register_handler_i (const ACE_Handle_Set &handles,
+				   ACE_Event_Handler *handler,
+				   ACE_Reactor_Mask mask)
+{
+  return ACE_Select_Reactor::register_handler_i (handles,
+                                                 handler,
+                                                 mask);
+}
+
+int
+ACE_FlReactor::remove_handler_i (ACE_HANDLE handle,
+				 ACE_Reactor_Mask mask)
+{
+  ACE_TRACE ("ACE_FlReactor::remove_handler_i");
+
+  // In the registration phase we registered first with
+  // ACE_Select_Reactor and then with X.  Now we are now doing things
+  // in reverse order.
+
+  // First clean up the corresponding X11Input.
+  Fl::remove_fd (ACE_reinterpret_cast(int,handle));
+
+  // Now let the reactor do its work.
+  return ACE_Select_Reactor::remove_handler_i (handle,
+                                               mask);
+}
+
+int
+ACE_FlReactor::remove_handler_i (const ACE_Handle_Set &handles,
+				 ACE_Reactor_Mask mask)
+{
+  return ACE_Select_Reactor::remove_handler_i (handles,
+					       mask);
+}
+
+// The following functions ensure that there is an Fl timeout for the
+// first timeout in the Reactor's Timer_Queue.
+
+void
+ACE_FlReactor::reset_timeout (void)
+{
+  ACE_Time_Value *max_wait_time =
+    this->timer_queue_->calculate_timeout (0);
+
+  if (max_wait_time != 0)
+    {
+      float t = max_wait_time->sec ()
+        + max_wait_time->usec () / 1000000.0F;
+      Fl::add_timeout (t, ACE_FlReactor::fl_timeout_proc, this);
+    }
+}
+
+long
+ACE_FlReactor::schedule_timer (ACE_Event_Handler *handler,
+			       const void *arg,
+			       const ACE_Time_Value &delta_time,
+			       const ACE_Time_Value &interval)
+{
+  ACE_TRACE ("ACE_FlReactor::schedule_timer");
+  ACE_MT (ACE_GUARD_RETURN (ACE_Select_Reactor_Token, ace_mon, this->token_, -1));
+
+  long result = ACE_Select_Reactor::schedule_timer (handler,
+                                                    arg,
+                                                    delta_time,
+                                                    interval);
+  if (result == -1)
+    return -1;
+  else
+    {
+      this->reset_timeout ();
+      return result;
+    }
+}
+
+int
+ACE_FlReactor::cancel_timer (ACE_Event_Handler *handler,
+			     int dont_call_handle_close)
+{
+  ACE_TRACE ("ACE_FlReactor::cancel_timer");
+
+  if (ACE_Select_Reactor::cancel_timer (handler,
+					dont_call_handle_close) == -1)
+    return -1;
+  else
+    {
+      this->reset_timeout ();
+      return 0;
+    }
+}
+
+int
+ACE_FlReactor::cancel_timer (long timer_id,
+			     const void **arg,
+			     int dont_call_handle_close)
+{
+  ACE_TRACE ("ACE_FlReactor::cancel_timer");
+
+  if (ACE_Select_Reactor::cancel_timer (timer_id,
+					arg,
+					dont_call_handle_close) == -1)
+    return -1;
+  else
+    {
+      this->reset_timeout ();
+      return 0;
+    }
+}
+
+#endif /* ACE_HAS_FL */