* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
+
+#include <config.h>
#include <dbus/dbus-resources.h>
#include <dbus/dbus-internals.h>
* @brief DBusCounter and other stuff related to resource limits
*
* Types and functions related to tracking resource limits,
- * such as the maximum amount of memory a connection can use
+ * such as the maximum amount of memory/unix fds a connection can use
* for messages, etc.
*/
{
int refcount; /**< reference count */
- long value; /**< current counter value */
+ long size_value; /**< current size counter value */
+ long unix_fd_value; /**< current unix fd counter value */
+
+#ifdef DBUS_ENABLE_STATS
+ long peak_size_value; /**< largest ever size counter value */
+ long peak_unix_fd_value; /**< largest ever unix fd counter value */
+#endif
+
+ long notify_size_guard_value; /**< call notify function when crossing this size value */
+ long notify_unix_fd_guard_value; /**< call notify function when crossing this unix fd value */
- long notify_guard_value; /**< call notify function when crossing this value */
DBusCounterNotifyFunction notify_function; /**< notify function */
void *notify_data; /**< data for notify function */
+ dbus_bool_t notify_pending : 1; /**< TRUE if the guard value has been crossed */
};
/** @} */ /* end of resource limits internals docs */
{
DBusCounter *counter;
- counter = dbus_new (DBusCounter, 1);
+ counter = dbus_new0 (DBusCounter, 1);
if (counter == NULL)
return NULL;
-
+
counter->refcount = 1;
- counter->value = 0;
- counter->notify_guard_value = 0;
- counter->notify_function = NULL;
- counter->notify_data = NULL;
-
return counter;
}
}
/**
- * Adjusts the value of the counter by the given
+ * Adjusts the value of the size counter by the given
* delta which may be positive or negative.
- * Calls the notify function from _dbus_counter_set_notify()
- * if that function has been specified.
+ *
+ * This function may be called with locks held. After calling it, when
+ * any relevant locks are no longer held you must call _dbus_counter_notify().
*
* @param counter the counter
- * @param delta value to add to the counter's current value
+ * @param delta value to add to the size counter's current value
+ */
+void
+_dbus_counter_adjust_size (DBusCounter *counter,
+ long delta)
+{
+ long old = counter->size_value;
+
+ counter->size_value += delta;
+
+#ifdef DBUS_ENABLE_STATS
+ if (counter->peak_size_value < counter->size_value)
+ counter->peak_size_value = counter->size_value;
+#endif
+
+#if 0
+ _dbus_verbose ("Adjusting counter %ld by %ld = %ld\n",
+ old, delta, counter->size_value);
+#endif
+
+ if (counter->notify_function != NULL &&
+ ((old < counter->notify_size_guard_value &&
+ counter->size_value >= counter->notify_size_guard_value) ||
+ (old >= counter->notify_size_guard_value &&
+ counter->size_value < counter->notify_size_guard_value)))
+ counter->notify_pending = TRUE;
+}
+
+/**
+ * Calls the notify function from _dbus_counter_set_notify(),
+ * if that function has been specified and the counter has crossed the
+ * guard value (in either direction) since the last call to this function.
+ *
+ * This function must not be called with locks held, since it can call out
+ * to user code.
*/
void
-_dbus_counter_adjust (DBusCounter *counter,
- long delta)
+_dbus_counter_notify (DBusCounter *counter)
{
- long old = counter->value;
+ if (counter->notify_pending)
+ {
+ counter->notify_pending = FALSE;
+ (* counter->notify_function) (counter, counter->notify_data);
+ }
+}
+
+/**
+ * Adjusts the value of the unix fd counter by the given
+ * delta which may be positive or negative.
+ *
+ * This function may be called with locks held. After calling it, when
+ * any relevant locks are no longer held you must call _dbus_counter_notify().
+ *
+ * @param counter the counter
+ * @param delta value to add to the unix fds counter's current value
+ */
+void
+_dbus_counter_adjust_unix_fd (DBusCounter *counter,
+ long delta)
+{
+ long old = counter->unix_fd_value;
- counter->value += delta;
+ counter->unix_fd_value += delta;
+
+#ifdef DBUS_ENABLE_STATS
+ if (counter->peak_unix_fd_value < counter->unix_fd_value)
+ counter->peak_unix_fd_value = counter->unix_fd_value;
+#endif
#if 0
_dbus_verbose ("Adjusting counter %ld by %ld = %ld\n",
- old, delta, counter->value);
+ old, delta, counter->unix_fd_value);
#endif
if (counter->notify_function != NULL &&
- ((old < counter->notify_guard_value &&
- counter->value >= counter->notify_guard_value) ||
- (old >= counter->notify_guard_value &&
- counter->value < counter->notify_guard_value)))
- (* counter->notify_function) (counter, counter->notify_data);
+ ((old < counter->notify_unix_fd_guard_value &&
+ counter->unix_fd_value >= counter->notify_unix_fd_guard_value) ||
+ (old >= counter->notify_unix_fd_guard_value &&
+ counter->unix_fd_value < counter->notify_unix_fd_guard_value)))
+ counter->notify_pending = TRUE;
}
/**
- * Gets the current value of the counter.
+ * Gets the current value of the size counter.
*
* @param counter the counter
- * @returns its current value
+ * @returns its current size value
*/
long
-_dbus_counter_get_value (DBusCounter *counter)
+_dbus_counter_get_size_value (DBusCounter *counter)
{
- return counter->value;
+ return counter->size_value;
+}
+
+/**
+ * Gets the current value of the unix fd counter.
+ *
+ * @param counter the counter
+ * @returns its current unix fd value
+ */
+long
+_dbus_counter_get_unix_fd_value (DBusCounter *counter)
+{
+ return counter->unix_fd_value;
}
/**
* Sets the notify function for this counter; the notify function is
- * called whenever the counter's value crosses the guard value in
+ * called whenever the counter's values cross the guard values in
* either direction (moving up, or moving down).
*
* @param counter the counter
- * @param guard_value the value we're notified if the counter crosses
+ * @param size_guard_value the value we're notified if the size counter crosses
+ * @param unix_fd_guard_value the value we're notified if the unix fd counter crosses
* @param function function to call in order to notify
* @param user_data data to pass to the function
*/
void
_dbus_counter_set_notify (DBusCounter *counter,
- long guard_value,
+ long size_guard_value,
+ long unix_fd_guard_value,
DBusCounterNotifyFunction function,
void *user_data)
{
- counter->notify_guard_value = guard_value;
+ counter->notify_size_guard_value = size_guard_value;
+ counter->notify_unix_fd_guard_value = unix_fd_guard_value;
counter->notify_function = function;
counter->notify_data = user_data;
+ counter->notify_pending = FALSE;
}
+#ifdef DBUS_ENABLE_STATS
+long
+_dbus_counter_get_peak_size_value (DBusCounter *counter)
+{
+ return counter->peak_size_value;
+}
+
+long
+_dbus_counter_get_peak_unix_fd_value (DBusCounter *counter)
+{
+ return counter->peak_unix_fd_value;
+}
+#endif
+
/** @} */ /* end of resource limits exported API */
projects / platform / upstream / dbus.git / blobdiff