• Main Page
  • Related Pages
  • Modules
  • Data Structures
  • Files
  • File List

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   dbus_bool_t notify_pending : 1; 
00067 };
00068   /* end of resource limits internals docs */
00070 
00082 DBusCounter*
00083 _dbus_counter_new (void)
00084 {
00085   DBusCounter *counter;
00086 
00087   counter = dbus_new (DBusCounter, 1);
00088   if (counter == NULL)
00089     return NULL;
00090   
00091   counter->refcount = 1;
00092   counter->size_value = 0;
00093   counter->unix_fd_value = 0;
00094 
00095   counter->notify_size_guard_value = 0;
00096   counter->notify_unix_fd_guard_value = 0;
00097   counter->notify_function = NULL;
00098   counter->notify_data = NULL;
00099   counter->notify_pending = FALSE;
00100   
00101   return counter;
00102 }
00103 
00110 DBusCounter *
00111 _dbus_counter_ref (DBusCounter *counter)
00112 {
00113   _dbus_assert (counter->refcount > 0);
00114   
00115   counter->refcount += 1;
00116 
00117   return counter;
00118 }
00119 
00126 void
00127 _dbus_counter_unref (DBusCounter *counter)
00128 {
00129   _dbus_assert (counter->refcount > 0);
00130 
00131   counter->refcount -= 1;
00132 
00133   if (counter->refcount == 0)
00134     {
00135       
00136       dbus_free (counter);
00137     }
00138 }
00139 
00150 void
00151 _dbus_counter_adjust_size (DBusCounter *counter,
00152                            long         delta)
00153 {
00154   long old = counter->size_value;
00155 
00156   counter->size_value += delta;
00157 
00158 #if 0
00159   _dbus_verbose ("Adjusting counter %ld by %ld = %ld\n",
00160                  old, delta, counter->size_value);
00161 #endif
00162 
00163   if (counter->notify_function != NULL &&
00164       ((old < counter->notify_size_guard_value &&
00165         counter->size_value >= counter->notify_size_guard_value) ||
00166        (old >= counter->notify_size_guard_value &&
00167         counter->size_value < counter->notify_size_guard_value)))
00168     counter->notify_pending = TRUE;
00169 }
00170 
00179 void
00180 _dbus_counter_notify (DBusCounter *counter)
00181 {
00182   if (counter->notify_pending)
00183     {
00184       counter->notify_pending = FALSE;
00185       (* counter->notify_function) (counter, counter->notify_data);
00186     }
00187 }
00188 
00199 void
00200 _dbus_counter_adjust_unix_fd (DBusCounter *counter,
00201                               long         delta)
00202 {
00203   long old = counter->unix_fd_value;
00204   
00205   counter->unix_fd_value += delta;
00206 
00207 #if 0
00208   _dbus_verbose ("Adjusting counter %ld by %ld = %ld\n",
00209                  old, delta, counter->unix_fd_value);
00210 #endif
00211   
00212   if (counter->notify_function != NULL &&
00213       ((old < counter->notify_unix_fd_guard_value &&
00214         counter->unix_fd_value >= counter->notify_unix_fd_guard_value) ||
00215        (old >= counter->notify_unix_fd_guard_value &&
00216         counter->unix_fd_value < counter->notify_unix_fd_guard_value)))
00217     counter->notify_pending = TRUE;
00218 }
00219 
00226 long
00227 _dbus_counter_get_size_value (DBusCounter *counter)
00228 {
00229   return counter->size_value;
00230 }
00231 
00238 long
00239 _dbus_counter_get_unix_fd_value (DBusCounter *counter)
00240 {
00241   return counter->unix_fd_value;
00242 }
00243 
00255 void
00256 _dbus_counter_set_notify (DBusCounter               *counter,
00257                           long                       size_guard_value,
00258                           long                       unix_fd_guard_value,
00259                           DBusCounterNotifyFunction  function,
00260                           void                      *user_data)
00261 {
00262   counter->notify_size_guard_value = size_guard_value;
00263   counter->notify_unix_fd_guard_value = unix_fd_guard_value;
00264   counter->notify_function = function;
00265   counter->notify_data = user_data;
00266   counter->notify_pending = FALSE;
00267 }
00268   /* end of resource limits exported API */

Generated on Fri Jul 11 2014 20:41:49 for D-Bus by  doxygen 1.7.1