Software Público Brasileiro

/*
 * "Software pw3270, desenvolvido com base nos códigos fontes do WC3270  e X3270
 * (Paul Mattes Paul.Mattes@usa.net), de emulação de terminal 3270 para acesso a
 * aplicativos mainframe. Registro no INPI sob o nome G3270.
 *
 * Copyright (C) <2008> <Banco do Brasil S.A.>
 *
 * Este programa é software livre. Você pode redistribuí-lo e/ou modificá-lo sob
 * os termos da GPL v.2 - Licença Pública Geral  GNU,  conforme  publicado  pela
 * Free Software Foundation.
 *
 * Este programa é distribuído na expectativa de  ser  útil,  mas  SEM  QUALQUER
 * GARANTIA; sem mesmo a garantia implícita de COMERCIALIZAÇÃO ou  de  ADEQUAÇÃO
 * A QUALQUER PROPÓSITO EM PARTICULAR. Consulte a Licença Pública Geral GNU para
 * obter mais detalhes.
 *
 * Você deve ter recebido uma cópia da Licença Pública Geral GNU junto com este
 * programa; se não, escreva para a Free Software Foundation, Inc., 51 Franklin
 * St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Este programa está nomeado como - e possui - linhas de código.
 *
 * Contatos:
 *
 * perry.werneck@gmail.com	(Alexandre Perry de Souza Werneck)
 * erico.mendonca@gmail.com	(Erico Mascarenhas Mendonça)
 *
 */

 #include <config.h>
 #include "../private.h"

/*---[ Structs ]-------------------------------------------------------------------------------------------*/

 typedef struct _IO_Source
 {
	GSource		  gsrc;
	GPollFD		  poll;
 	gboolean	  enabled;
	int			  fd;
	void		  (*call)(H3270 *, int, LIB3270_IO_FLAG, void *);
	H3270		* session;
	void		* userdata;
 } IO_Source;

/*---[ Implement ]-----------------------------------------------------------------------------------------*/

static gboolean IO_prepare(G_GNUC_UNUSED GSource *source, G_GNUC_UNUSED gint *timeout)
{
	/*
 	 * Called before all the file descriptors are polled.
	 * If the source can determine that it is ready here
	 * (without waiting for the results of the poll() call)
	 * it should return TRUE.
	 *
	 * It can also return a timeout_ value which should be the maximum
	 * timeout (in milliseconds) which should be passed to the poll() call.
	 * The actual timeout used will be -1 if all sources returned -1,
	 * or it will be the minimum of all the timeout_ values
	 * returned which were >= 0.
	 *
	 */
	return 0;
}

static gboolean IO_check(GSource *source)
{
	/*
 	 * Called after all the file descriptors are polled.
 	 * The source should return TRUE if it is ready to be dispatched.
	 * Note that some time may have passed since the previous prepare
	 * function was called, so the source should be checked again here.
	 *
	 */
	fd_set rfds, wfds;
	struct timeval tm;

	memset(&tm,0,sizeof(tm));

	FD_ZERO(&rfds);
	FD_ZERO(&wfds);
//	FD_ZERO(&xfds);

	if(((IO_Source *) source)->poll.events & G_IO_IN)
	{
		FD_SET(((IO_Source *) source)->poll.fd, &rfds);
	}

	if(((IO_Source *) source)->poll.events & G_IO_OUT)
	{
		FD_SET(((IO_Source *) source)->poll.fd, &wfds);
	}

	if(select(((IO_Source *) source)->poll.fd+1, &rfds, &wfds, NULL, &tm) > 0)
		return TRUE;

	return FALSE;
}

static gboolean IO_dispatch(GSource *source, G_GNUC_UNUSED GSourceFunc callback, G_GNUC_UNUSED gpointer user_data)
{
	/*
	 * Called to dispatch the event source,
	 * after it has returned TRUE in either its prepare or its check function.
	 * The dispatch function is passed in a callback function and data.
	 * The callback function may be NULL if the source was never connected
	 * to a callback using g_source_set_callback(). The dispatch function
	 * should call the callback function with user_data and whatever additional
	 * parameters are needed for this type of event source.
	 */
	IO_Source *obj = (IO_Source *) source;

	obj->call(obj->session,obj->fd,0,obj->userdata);

	return TRUE;
}

static void IO_finalize(G_GNUC_UNUSED GSource *source)
{

}

static gboolean IO_closure(G_GNUC_UNUSED gpointer data)
{
	return 0;
}