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