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// $Id: test_XtReactor1.cpp 91673 2010-09-08 18:49:47Z johnnyw $
// The following is another test that exercises the Eric C. Newton's
// <ecn@clark.net> XtReactor implementation.
#include "ace/OS_main.h"
#include "ace/XtReactor/XtReactor.h"
#include "ace/Reactor.h"
#include "ace/Message_Block.h"
#include "ace/Log_Msg.h"
#include "ace/OS_NS_unistd.h"
#include "ace/OS_NS_fcntl.h"
#include <Xm/PushB.h>
class Stdout : public ACE_Event_Handler
{
public:
Stdout (ACE_Reactor * r)
: reactor_ (r),
msg_ (1000000) // Make a very big message block.
{
int flags = ACE_OS::fcntl (ACE_STDOUT, F_GETFL);
if (flags != -1
&& ACE_OS::fcntl (ACE_STDOUT,
F_SETFL, flags | O_NONBLOCK) != -1)
return;
else
ACE_DEBUG ((LM_DEBUG,
"Unable to set stdout to non-block."));
}
ACE_HANDLE get_handle (void) const { return ACE_STDOUT; }
int handle_output (ACE_HANDLE)
{
char *s = msg_.rd_ptr ();
if (ACE_OS::write (ACE_STDOUT, s, 1) == 1)
{
ACE_DEBUG ((LM_DEBUG,
"wrote output '%d'\n",
(int) *s));
msg_.rd_ptr (1);
}
if (msg_.length () == 0)
{
reactor_->remove_handler (this,
ACE_Event_Handler::WRITE_MASK);
msg_.rd_ptr (msg_.base ());
msg_.wr_ptr (msg_.base ());
}
return 0;
}
void put (char c)
{
if (msg_.length () == 0)
reactor_->register_handler (this,
ACE_Event_Handler::WRITE_MASK);
if (msg_.wr_ptr () < msg_.end ())
{
*msg_.wr_ptr () = c;
msg_.wr_ptr (1);
}
else
ACE_DEBUG ((LM_DEBUG,
"Oops... data falling off the end of the buffer!\n"));
}
private:
ACE_Reactor *reactor_;
ACE_Message_Block msg_;
};
class Stdin : public ACE_Event_Handler
{
public:
Stdin (Stdout *out)
: out_ (out) {}
ACE_HANDLE get_handle () const { return ACE_STDIN; }
int handle_input (ACE_HANDLE)
{
char c;
if (ACE_OS::read (ACE_STDIN, &c, 1) == 1)
out_->put (c);
return 0;
}
int handle_timeout (const ACE_Time_Value &tv, const void *)
{
ACE_DEBUG ((LM_DEBUG,
"Timeout! %f\n",
(double) (tv.msec () / 1000.)));
return 0;
}
private:
Stdout *out_;
};
static void
ActivateCB (Widget, XtPointer, XtPointer)
{
ACE_DEBUG ((LM_DEBUG,
"Button pushed!\n"));
}
int
ACE_TMAIN (int argc, ACE_TCHAR**argv)
{
// The worlds most useless user interface
Widget top_level = XtVaAppInitialize (0,
"buttontest",
0,
0,
&argc,
argv,
0,
static_cast<void *>(0));
char change[] = "change"; // XmCreatePushButton() wants a non-const
// string.
Widget button = XmCreatePushButton (top_level,
change,
0,
0);
XtManageChild (button);
XtAddCallback (button,
XmNactivateCallback,
ActivateCB,
0);
// A reactor beastie.
ACE_XtReactor xreactor (XtWidgetToApplicationContext (top_level));
ACE_Reactor reactor (&xreactor);
// Print a message when data is recv'd on stdin...
ACE_Event_Handler *stdin_;
ACE_NEW_RETURN (stdin_,
Stdin (new Stdout (&reactor)),
-1);
reactor.register_handler (stdin_,
ACE_Event_Handler::READ_MASK);
// Print a message every 10 seconds.
if (reactor.schedule_timer (stdin_, 0,
ACE_Time_Value (10),
ACE_Time_Value (10)) == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"schedule_timer"),
-1);
// Show the top_level widget.
XtRealizeWidget (top_level);
// Demonstrate Reactor/Xt event loop unification.
XtAppMainLoop (XtWidgetToApplicationContext (top_level));
return 0;
}
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