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dbus-resources.c

00001 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
00002 /* dbus-resources.c Resource tracking/limits
00003  *
00004  * Copyright (C) 2003  Red Hat Inc.
00005  *
00006  * Licensed under the Academic Free License version 2.1
00007  * 
00008  * This program is free software; you can redistribute it and/or modify
00009  * it under the terms of the GNU General Public License as published by
00010  * the Free Software Foundation; either version 2 of the License, or
00011  * (at your option) any later version.
00012  *
00013  * This program is distributed in the hope that it will be useful,
00014  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00015  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016  * GNU General Public License for more details.
00017  * 
00018  * You should have received a copy of the GNU General Public License
00019  * along with this program; if not, write to the Free Software
00020  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
00021  *
00022  */
00023 
00024 #include <config.h>
00025 #include <dbus/dbus-resources.h>
00026 #include <dbus/dbus-internals.h>
00027 
00054 struct DBusCounter
00055 {
00056   int refcount;  
00058   long size_value;       
00059   long unix_fd_value;    
00061   long notify_size_guard_value;    
00062   long notify_unix_fd_guard_value; 
00064   DBusCounterNotifyFunction notify_function; 
00065   void *notify_data; 
00066 };
00067   /* end of resource limits internals docs */
00069 
00081 DBusCounter*
00082 _dbus_counter_new (void)
00083 {
00084   DBusCounter *counter;
00085 
00086   counter = dbus_new (DBusCounter, 1);
00087   if (counter == NULL)
00088     return NULL;
00089   
00090   counter->refcount = 1;
00091   counter->size_value = 0;
00092   counter->unix_fd_value = 0;
00093 
00094   counter->notify_size_guard_value = 0;
00095   counter->notify_unix_fd_guard_value = 0;
00096   counter->notify_function = NULL;
00097   counter->notify_data = NULL;
00098   
00099   return counter;
00100 }
00101 
00108 DBusCounter *
00109 _dbus_counter_ref (DBusCounter *counter)
00110 {
00111   _dbus_assert (counter->refcount > 0);
00112   
00113   counter->refcount += 1;
00114 
00115   return counter;
00116 }
00117 
00124 void
00125 _dbus_counter_unref (DBusCounter *counter)
00126 {
00127   _dbus_assert (counter->refcount > 0);
00128 
00129   counter->refcount -= 1;
00130 
00131   if (counter->refcount == 0)
00132     {
00133       
00134       dbus_free (counter);
00135     }
00136 }
00137 
00147 void
00148 _dbus_counter_adjust_size (DBusCounter *counter,
00149                            long         delta)
00150 {
00151   long old = counter->size_value;
00152 
00153   counter->size_value += delta;
00154 
00155 #if 0
00156   _dbus_verbose ("Adjusting counter %ld by %ld = %ld\n",
00157                  old, delta, counter->size_value);
00158 #endif
00159 
00160   if (counter->notify_function != NULL &&
00161       ((old < counter->notify_size_guard_value &&
00162         counter->size_value >= counter->notify_size_guard_value) ||
00163        (old >= counter->notify_size_guard_value &&
00164         counter->size_value < counter->notify_size_guard_value)))
00165     (* counter->notify_function) (counter, counter->notify_data);
00166 }
00167 
00177 void
00178 _dbus_counter_adjust_unix_fd (DBusCounter *counter,
00179                               long         delta)
00180 {
00181   long old = counter->unix_fd_value;
00182   
00183   counter->unix_fd_value += delta;
00184 
00185 #if 0
00186   _dbus_verbose ("Adjusting counter %ld by %ld = %ld\n",
00187                  old, delta, counter->unix_fd_value);
00188 #endif
00189   
00190   if (counter->notify_function != NULL &&
00191       ((old < counter->notify_unix_fd_guard_value &&
00192         counter->unix_fd_value >= counter->notify_unix_fd_guard_value) ||
00193        (old >= counter->notify_unix_fd_guard_value &&
00194         counter->unix_fd_value < counter->notify_unix_fd_guard_value)))
00195     (* counter->notify_function) (counter, counter->notify_data);
00196 }
00197 
00204 long
00205 _dbus_counter_get_size_value (DBusCounter *counter)
00206 {
00207   return counter->size_value;
00208 }
00209 
00216 long
00217 _dbus_counter_get_unix_fd_value (DBusCounter *counter)
00218 {
00219   return counter->unix_fd_value;
00220 }
00221 
00233 void
00234 _dbus_counter_set_notify (DBusCounter               *counter,
00235                           long                       size_guard_value,
00236                           long                       unix_fd_guard_value,
00237                           DBusCounterNotifyFunction  function,
00238                           void                      *user_data)
00239 {
00240   counter->notify_size_guard_value = size_guard_value;
00241   counter->notify_unix_fd_guard_value = unix_fd_guard_value;
00242   counter->notify_function = function;
00243   counter->notify_data = user_data;
00244 }
00245   /* end of resource limits exported API */

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