obt/instance.c


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/* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-

   obt/instance.c for the Openbox window manager
   Copyright (c) 2007        Dana Jansens

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   See the COPYING file for a copy of the GNU General Public License.
*/

#include "obt/obt.h"

#ifdef HAVE_STRING_H
#  include <string.h>
#endif
#ifdef HAVE_FCNTL_H
#  include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#  include <unistd.h>
#endif

struct _ObtInstance
{
    gint ref;
    Display *d;
};

ObtInstance* obt_instance_new(const char *display_name)
{
    gchar *n;
    Display *d;
    ObtInstance *inst = NULL;

    n = display_name ? g_strdup(display_name) : NULL;
    d = XOpenDisplay(n);
    if (d) {
        if (fcntl(ConnectionNumber(d), F_SETFD, 1) == -1)
            g_message("Failed to set display as close-on-exec");

        inst = g_new(ObtInstance, 1);
        inst->ref = 1;
        inst->d = d;
    }
    g_free(n);

    return inst;
}

void obt_instance_ref(ObtInstance *inst)
{
    ++inst->ref;
}

void obt_instance_unref(ObtInstance *inst)
{
    if (inst && --inst->ref == 0) {
        XCloseDisplay(inst->d);
        obt_free0(inst, ObtInstance, 1);
    }
}

Display* obt_display(const ObtInstance *inst)
{
    return inst->d;
}