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/* DBus device reservation API
*
* Copyright © 2019 Wim Taymans
*
* 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 (including the next
* paragraph) 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.
*/
#ifndef DEVICE_RESERVE_H
#define DEVICE_RESERVE_H
#include <dbus/dbus.h>
#include <inttypes.h>
#ifdef __cplusplus
extern "C" {
#endif
struct rd_device;
struct rd_device_callbacks {
/** the device is acquired by us */
void (*acquired) (void *data, struct rd_device *d);
/** request a release of the device */
void (*release) (void *data, struct rd_device *d, int forced);
/** the device is busy by someone else */
void (*busy) (void *data, struct rd_device *d, const char *name, int32_t priority);
/** the device is made available by someone else */
void (*available) (void *data, struct rd_device *d, const char *name);
};
/* create a new device and start watching */
struct rd_device *
rd_device_new(DBusConnection *connection, /**< Bus to watch */
const char *device_name, /**< The device to lock, e.g. "Audio0" */
const char *application_name, /**< A human readable name of the application,
* e.g. "PipeWire Server" */
int32_t priority, /**< The priority for this application.
* If unsure use 0 */
const struct rd_device_callbacks *callbacks, /**< Called when device name is acquired/released */
void *data);
/** try to acquire the device */
int rd_device_acquire(struct rd_device *d);
/** request the owner to release the device */
int rd_device_request_release(struct rd_device *d);
/** complete the release of the device */
int rd_device_complete_release(struct rd_device *d, int res);
/** release a device */
void rd_device_release(struct rd_device *d);
/** destroy a device */
void rd_device_destroy(struct rd_device *d);
/* Set the application device name for an rd_device object. Returns 0
* on success, a negative errno style return value on error. */
int rd_device_set_application_device_name(struct rd_device *d, const char *name);
#ifdef __cplusplus
}
#endif
#endif
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