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+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: t -*-*/
+
+#ifndef fooreservemonitorhfoo
+#define fooreservemonitorhfoo
+
+/***
+ Copyright 2009 Lennart Poettering
+
+ Permission is hereby granted, free of charge, to any person
+ obtaining a copy of this software and associated documentation files
+ (the "Software"), to deal in the Software without restriction,
+ including without limitation the rights to use, copy, modify, merge,
+ publish, distribute, sublicense, and/or sell copies of the Software,
+ and to permit persons to whom the Software is furnished to do so,
+ subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ SOFTWARE.
+***/
+
+#include <dbus/dbus.h>
+#include <inttypes.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct rm_monitor rm_monitor;
+
+/* Prototype for a function that is called whenever the reservation
+ * device of a device changes. Use rm_monitor_busy() to find out the
+ * new state.*/
+typedef void (*rm_change_cb_t)(rm_monitor *m);
+
+/* Creates a monitor for watching the lock status of a device. Returns
+ * 0 on success, a negative errno style return value on error. The
+ * DBus error might be set as well if the error was caused D-Bus. */
+int rm_watch(
+ rm_monitor **m, /* On success a pointer to the newly allocated rm_device object will be filled in here */
+ DBusConnection *connection, /* Session bus (when D-Bus learns about user busses we should switchg to user busses) */
+ const char *device_name, /* The device to monitor, e.g. "Audio0" */
+ rm_change_cb_t change_cb, /* Will be called whenever the lock status changes. May be NULL */
+ DBusError *error); /* If we fail due to a D-Bus related issue the error will be filled in here. May be NULL. */
+
+/* Free a rm_monitor object */
+void rm_release(rm_monitor *m);
+
+/* Checks whether the device is currently reserved, and returns 1
+ * then, 0 if not, negative errno style error code value on error. */
+int rm_busy(rm_monitor *m);
+
+/* Attach a userdata pointer to an rm_monitor */
+void rm_set_userdata(rm_monitor *m, void *userdata);
+
+/* Query the userdata pointer from an rm_monitor. Returns NULL if no
+ * userdata was set. */
+void* rm_get_userdata(rm_monitor *m);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif